Re: SLES15 SP3 Quarterly Update Images (QU2) released

[Christer Solskogen]

On Tue, Feb 15, 2022 at 3:00 PM Mark Post  wrote:

>
> Scroll further down and you'll also see:
> SLE-15-SP3-Online-s390x-QU2-Media1.iso and
> SLE-15-SP3-Online-s390x-QU2-Media2.iso. The Media2 image only contains
> source, so it will not be needed to perform an install.
>
> These are the "online" version of the install media. That means to
> perform a brand new installation, you'll need to either access the SUSE
> repositories for all the packages that have not been updated, or a local
> mirror of the packages, such as provided by SMT (Subscription Management
> Tool), RMT (Repository Mirroring Tool), or SUSE Manager.
>
>
Are there any doc on how to connect it to SuSE Manager? Earlier I only
found the installer to support SMT/RMT.

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Re: Thinly provisioned dasd and SuSE

[Christer Solskogen]

On Thu, May 6, 2021 at 5:13 PM Jan Höppner  wrote:

> On 06/05/2021 09:00, Christer Solskogen wrote:
> > When installing SuSE (15SP2) I cannot use the installer to format a 3390
> > which is thinly provisioned from the disk system. The installer will fail
> > when formatting.
> > I can do a dasdfmt manually with "-M full" before starting the
> > installation, and that will work. Is this a known bug?
>
> Hi Christer,
>
> I suspect there is still an issue with parallel formatting and
> thin-provisioned DASD devices in SLES15SP2. Do you have any logs
> or more details how this failure is expressed?
>
> I'll get in touch with Mark from Suse as he fixed the parallel
> formatting in SP3. I reckon we need these changes for SP2, too.
>
>
I suspect it's a bug in dasdfmt, because "-M full" is supposed to be the
default (according to the man page), but without that option
it will use quick instead.

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Thinly provisioned dasd and SuSE

[Christer Solskogen]

When installing SuSE (15SP2) I cannot use the installer to format a 3390
which is thinly provisioned from the disk system. The installer will fail
when formatting.
I can do a dasdfmt manually with "-M full" before starting the
installation, and that will work. Is this a known bug?

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Re: Satellite server for zlinux

[Christer Solskogen]

It should also work.

On Thu, Feb 27, 2020 at 9:58 AM Peter  wrote:

> In my case server as X86 and client s390 for redhat ?
>
> On Thu, 27 Feb, 2020, 12:49 PM Christer Solskogen, <
> christer.solsko...@gmail.com> wrote:
>
> > It should. We run SuSE Manager on s390x and only serving s390x machines,
> > but in theory we could also add x86_64 clients to it.
> >
> > On Thu, Feb 27, 2020 at 8:50 AM Peter  wrote:
> >
> > > Hello
> > >
> > > Does satellite Server concept works for Mainframe ?
> > >
> > > If this is a doable can we run satellite Server on x86 and push the
> fixes
> > > running on zVM ?
> > >
> > >
> > > Peter
> > >
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Re: Satellite server for zlinux

[Christer Solskogen]

It should. We run SuSE Manager on s390x and only serving s390x machines,
but in theory we could also add x86_64 clients to it.

On Thu, Feb 27, 2020 at 8:50 AM Peter  wrote:

> Hello
>
> Does satellite Server concept works for Mainframe ?
>
> If this is a doable can we run satellite Server on x86 and push the fixes
> running on zVM ?
>
>
> Peter
>
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Re: dasd_configure in SLES 12 SP4

[Christer Solskogen]

On Fri, May 31, 2019 at 12:48 PM Michael MacIsaac 
wrote:

> Mark,
>
> > The wrappers will be removed at some point in the future.
> Why?  Doing so will break scripts we have ...
>
>
Same here. I would urge SuSE to keep them.

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ucarp alternative on SLES?

[Christer Solskogen]

It looks to me that ucarp is not available for SLES. Is there a good
alternative that I can use?

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Diagnose high wait

[Christer Solskogen]

While we're at talking about high steal% , could somebody share some
insights about how to diagnose high wait%?

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Re: Problems registering with SUSEConnect

[Christer Solskogen]

Already done.

On Feb 18, 2017 23:42, "Mark Post" <mp...@suse.com> wrote:

> >>> On 2/17/2017 at 02:03 AM, Christer Solskogen <
> christer.solsko...@gmail.com>
> wrote:
> > Both "read_vaule -s" and "read_value -c" gives return_code=-2. This is
> > running on zVM 6.2 on a zEC12.
> > return_value -V gives
> > Version 1.0 2015-10-12 13:31.
>
> Based on this, I think you should open up a problem report with your
> service provider.
>
>
> Mark Post
>
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Re: Problems registering with SUSEConnect

[Christer Solskogen]

I tried running the same LPAR (and Linux) on z13. Same error.

On Fri, Feb 17, 2017 at 8:03 AM, Christer Solskogen <
christer.solsko...@gmail.com> wrote:

> Both "read_vaule -s" and "read_value -c" gives return_code=-2. This is
> running on zVM 6.2 on a zEC12.
> return_value -V gives
> Version 1.0 2015-10-12 13:31.
>
> On Thu, Feb 16, 2017 at 10:31 PM, Mark Post <mp...@suse.com> wrote:
>
>> >>> On 2/16/2017 at 08:17 AM, Christer Solskogen <
>> christer.solsko...@gmail.com>
>> wrote:
>> > Any by node name, you mean hostname?
>> > I still get it with a hostname that is only six characters long :/
>> >
>> > On Thu, Feb 16, 2017 at 1:44 PM, Waite, Dick (External) <
>> > dick.wa...@softwareag.com> wrote:
>> >
>> >> Grand Day,
>> >> It's a known issue. I expect your node name is 8 chars long. There is a
>> >> fix, sorry I'm in the wilds at the moment. As a work-a-round us a 7
>> byte or
>> >> less node name.
>> >> __R
>>
>> Dick didn't have it quite right.  The trigger he's remembering is
>> anything less than 8 characters (not 7) in the z/VM guest name (not Linux
>> host name) will trigger a bug.  I'm not convinced that's the same bug as
>> you're seeing.  The bug he's referring to was getting a "-3" return code
>> from "read_values -s", and you're getting a "-2" from "read_values -c".
>> What type of processor is this running on?  A z13, or z13s?  Also, what
>> does "read_values -V" return?
>>
>>
>> Mark Post
>>
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>
>

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Re: Problems registering with SUSEConnect

[Christer Solskogen]

Both "read_vaule -s" and "read_value -c" gives return_code=-2. This is
running on zVM 6.2 on a zEC12.
return_value -V gives
Version 1.0 2015-10-12 13:31.

On Thu, Feb 16, 2017 at 10:31 PM, Mark Post <mp...@suse.com> wrote:

> >>> On 2/16/2017 at 08:17 AM, Christer Solskogen <
> christer.solsko...@gmail.com>
> wrote:
> > Any by node name, you mean hostname?
> > I still get it with a hostname that is only six characters long :/
> >
> > On Thu, Feb 16, 2017 at 1:44 PM, Waite, Dick (External) <
> > dick.wa...@softwareag.com> wrote:
> >
> >> Grand Day,
> >> It's a known issue. I expect your node name is 8 chars long. There is a
> >> fix, sorry I'm in the wilds at the moment. As a work-a-round us a 7
> byte or
> >> less node name.
> >> __R
>
> Dick didn't have it quite right.  The trigger he's remembering is anything
> less than 8 characters (not 7) in the z/VM guest name (not Linux host name)
> will trigger a bug.  I'm not convinced that's the same bug as you're
> seeing.  The bug he's referring to was getting a "-3" return code from
> "read_values -s", and you're getting a "-2" from "read_values -c".  What
> type of processor is this running on?  A z13, or z13s?  Also, what does
> "read_values -V" return?
>
>
> Mark Post
>
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Re: Problems registering with SUSEConnect

[Christer Solskogen]

Any by node name, you mean hostname?
I still get it with a hostname that is only six characters long :/

On Thu, Feb 16, 2017 at 1:44 PM, Waite, Dick (External) <
dick.wa...@softwareag.com> wrote:

> Grand Day,
> It's a known issue. I expect your node name is 8 chars long. There is a
> fix, sorry I'm in the wilds at the moment. As a work-a-round us a 7 byte or
> less node name.
> __R
>
> Sent from my BlackBerry 10 smartphone.
>   Original Message
> From: Christer Solskogen
> Sent: Thursday, 16 February 2017 11:53
> To: LINUX-390@VM.MARIST.EDU
> Reply To: Linux on 390 Port
> Subject: Problems registering with SUSEConnect
>
>
> OS: SLES12 SP2
>
> It seems like the command "read_values" is having problems.
> Output of "read_values -c" gives:
> Error: Unable to open configuration, return_code= -2
>
> anyone else seen this?
>
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> Software AG – Sitz/Registered office: Uhlandstraße 12, 64297 Darmstadt,
> Germany – Registergericht/Commercial register: Darmstadt HRB 1562 -
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> of the Supervisory Board: Dr. Andreas Bereczky - http://www.softwareag.com
>
>

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Problems registering with SUSEConnect

[Christer Solskogen]

OS: SLES12 SP2

It seems like the command "read_values" is having problems.
Output of "read_values -c" gives:
Error: Unable to open configuration, return_code= -2

anyone else seen this?

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Re: WWN change

[Christer Solskogen]

On Fri, Oct 28, 2016 at 1:24 PM, Steffen Maier 
wrote:
< a lot>

This was *really* helpful. Thanks!

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Re: WWN change

[Christer Solskogen]

On Thu, Oct 27, 2016 at 6:55 PM, Alan Altmark 
wrote:

> On Thursday, 10/27/2016 at 02:32 GMT, "Cohen, Sam" 
> wrote:
> > If you're not replacing the target SAN disks, then there are no changes
> to z/VM or a Linux
> > connections (as long as the IOADDRS are unchanged).  Your SAN fabric has
> to change for the new
> > WWPNS on the z.
>
> The z13 includes support to retain the NPIV WWPNs during an upgrade.  Look
> for the "Update I/O World Wide Port Number" task.  (Read it as "Update I/O
> Serial Number Portion of WWPNs".)  This was previously an RPQ.
>
> To the extent you keep the same IOCDS definitions and PCHID assignments,
> you can keep the same NPIV WWPNs.
>
>
But we are changing the target SAN disks as well. And new SAN switches.

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WWN change

[Christer Solskogen]

Hi!

We are in the process of moving our z/VMs and all of the linux systems over
to z13 from a zEC12.
And just to make it even more complicated we are moving. That also means
that the disk system is also moved (DS8870). The disk system is somehow in
sync with the old system, I'm no storage guy so I'm not sure how this work.
I only know that it works ;-)

But after the move the wwn is going to change (I guess it would have
changed anyways?) - Is there an easy way or do I have to add the luns
manually for every server once the linux system is running on z13?

Linux system disks are on 3390, but data is on SAN / zfcp.

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Re: 2016-07-21 Linux on z Systems - Kernel 4.5 related updates on developerWorks

[Christer Solskogen]

Are there any distributions that package this kernels?

On Thu, Aug 18, 2016 at 11:07 AM, Gerhard Hiller  wrote:

> Please refer to
> http://www.ibm.com/developerworks/linux/linux390/whatsnew.html
> for several updates to the 'Development stream':
>  * kernel 4.5 patch for kernel message catalog
>  * s390-tools 1.35.0 delivers new functionality
>and bug fixes
> * end of message
>
> Mit freundlichen Grüßen / Kind regards
> *Gerhard Hiller*
>
> Software Management and Linux Technologies
> IBM Systems
> Phone:  +49-7031-16-4388  IBM Deutschland
>  Schoenaicher Str. 220
> E-Mail:  ghil...@de.ibm.com  71032 Boeblingen
>  Germany
> IBM Deutschland Research & Development GmbH
> Vorsitzende des Aufsichtsrats: Martina Koederitz,  Geschäftsführung: Dirk
> Wittkopp
> Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart,
> HRB 243294
>
>

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Re: qeth.5cb8a3: 0.0.0700: The qeth device is not configured for the OSI layer required by z/VM

[Christer Solskogen]

False alarm, folks!
It seems like the ftp-server and the guest is *not* on the same
network, and that for some reason the vswitch is configured as layer
2.
Sorry for the noise!

On Tue, Aug 16, 2016 at 3:00 PM, Michael Weiner
<mwei...@infinite-blue.com> wrote:
> Interesting. I had an issue when upgrading from a service pack to SLES11 SP4, 
> after the upgrade I had to reconfigure the network with yast.
>
> Sent from my iPhone
>
>> On Aug 16, 2016, at 08:47, Christer Solskogen <christer.solsko...@gmail.com> 
>> wrote:
>>
>> This is a fresh install.
>> The weird thing is that if I configure the nic as a layer 2, I can the
>> network "up". And by up I mean that I can ping the host from my
>> machine, but the guest itself cannot get to my ftp-server which it
>> *should* be able to do as it is on the same network.
>>
>> On Tue, Aug 16, 2016 at 2:35 PM, Michael Weiner
>> <mwei...@infinite-blue.com> wrote:
>>> Hi Christer,
>>>
>>> Are you upgrading or fresh install?
>>>
>>>
>>> Sent from my iPhone
>>>
>>>> On Aug 16, 2016, at 08:26, Christer Solskogen 
>>>> <christer.solsko...@gmail.com> wrote:
>>>>
>>>> Hi!
>>>>
>>>> I'm trying to install SLES11SP4 on a machine on one of our z/VMs, but
>>>> I can't seem to get past the error mentioned in subject when I
>>>> configure the network.
>>>>
>>>> As far as I know, our vswitches are all layer 3 (how can I check if it
>>>> is?) - and even if I configure it as layer 2, the network does not
>>>> work as it really should. I've installed many linuxes on zVM now, and
>>>> I've never seen this problem before.
>>>>
>>>> (z/VM is 6.2)
>>>>
>>>> --
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>>>
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Re: qeth.5cb8a3: 0.0.0700: The qeth device is not configured for the OSI layer required by z/VM

[Christer Solskogen]

This is a fresh install.
The weird thing is that if I configure the nic as a layer 2, I can the
network "up". And by up I mean that I can ping the host from my
machine, but the guest itself cannot get to my ftp-server which it
*should* be able to do as it is on the same network.

On Tue, Aug 16, 2016 at 2:35 PM, Michael Weiner
<mwei...@infinite-blue.com> wrote:
> Hi Christer,
>
> Are you upgrading or fresh install?
>
>
> Sent from my iPhone
>
>> On Aug 16, 2016, at 08:26, Christer Solskogen <christer.solsko...@gmail.com> 
>> wrote:
>>
>> Hi!
>>
>> I'm trying to install SLES11SP4 on a machine on one of our z/VMs, but
>> I can't seem to get past the error mentioned in subject when I
>> configure the network.
>>
>> As far as I know, our vswitches are all layer 3 (how can I check if it
>> is?) - and even if I configure it as layer 2, the network does not
>> work as it really should. I've installed many linuxes on zVM now, and
>> I've never seen this problem before.
>>
>> (z/VM is 6.2)
>>
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qeth.5cb8a3: 0.0.0700: The qeth device is not configured for the OSI layer required by z/VM

[Christer Solskogen]

Hi!

I'm trying to install SLES11SP4 on a machine on one of our z/VMs, but
I can't seem to get past the error mentioned in subject when I
configure the network.

As far as I know, our vswitches are all layer 3 (how can I check if it
is?) - and even if I configure it as layer 2, the network does not
work as it really should. I've installed many linuxes on zVM now, and
I've never seen this problem before.

(z/VM is 6.2)

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Re: A must...

[Christer Solskogen]

On Thu, Apr 7, 2016 at 4:41 PM, Agblad Tore (Supplier)
 wrote:
> Anyone got a car with this extra feature ?   :)
>
> https://pbs.twimg.com/media/CToKWCDUAAAUeJ7.jpg
>

What?! Photoshop?

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Re: zswap missing?

[Christer Solskogen]

On Mar 11, 2016 15:19, "Nix, Robert P."  wrote:
>
> I have to agree with Mark. From the beginning, the goal was to keep Linux
> from swapping, and allow zVM to page if necessary. There¹s no sense in two
> different layers virtualizing memory. If you¹re pushing into swap,
> consider making the virtual machine bigger.
>
> zVM can easily handle a 2:1 overallocation of memory, and paging rates in
> the thousands per second. There¹s no reason to have Linux paging or
> swapping, let alone wasting resources compressing the swap.

Point taken. Thanks, guys!

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Re: zswap missing?

[Christer Solskogen]

On Thu, Mar 10, 2016 at 6:27 PM,   wrote:
> https://en.wikipedia.org/wiki/Zswap
>
> Seems like this is experimental


This is a bit more technical: https://lwn.net/Articles/537422/
I wouldn't say experimental anymore, since it's been in the kernel since 3.7.

The reason I'm asking is that on x86_64 is enabled on Ubuntu like this:
CONFIG_ZSWAP=y

While on SLES11 and SLES12 on s390x CONFIG_ZSWAP isn't even mentioned,
so at first it didn't even look like ZSWAP is available at all on
s390x.
If the module was available, but not compiled in it would look
something like this: #CONFIG_ZSWAP is not set

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Re: Development sources for SLES12SP1

[Christer Solskogen]

On Thu, Mar 10, 2016 at 3:23 PM, Roger Evans
 wrote:
> Does anybody know where to find the development sources for SLES12 SP1?   
> Specifically, I need the readline.h, prcre.h and openssl header files to 
> build Openresty.
>

You'll find them in the following packages: readline-devel pcre-devel
and libopenssl-devel.

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zswap missing?

[Christer Solskogen]

Hi!

Isn't zswap available for s390x? I can't find anything on either
SLES11 or SLES12.

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Re: LINUX SSH problem.

[Christer Solskogen]

Do you happen to log in as root? Because that won't work.

On Thu, Mar 3, 2016 at 6:21 PM, Offer Baruch  wrote:
> I think that ssh does not allow for your home directory to be write enabled
> for the group (i have seen this on redhat).
> Make sure your home directory has the correct permissions...
>
> Good luck
> Offer Baruch
> On Mar 3, 2016 5:36 PM, "Tom Huegel"  wrote:
>
>> I wish I had some idea of what I might have changed. Intentionally I
>> haven't changed anything.
>> There are no new messages in the /var/log/messages file after a failed
>> logon.
>>
>> Comparing /etc/parm.d/sshd to another system that allows SSH logons ...
>> they are identical.
>> cat
>> /etc/pam.d/sshd
>>
>> #%PAM-1.0
>>
>> auth   required
>> pam_sepermit.so
>> auth   substack
>> password-auth
>> auth   include
>> postlogin
>> # Used with polkit to reauthorize users in remote
>> sessions
>> -auth  optional pam_reauthorize.so
>> prepare
>> accountrequired
>> pam_nologin.so
>> accountinclude
>> password-auth
>> password   include
>> password-auth
>> # pam_selinux.so close should be the first session
>> rule
>> sessionrequired pam_selinux.so
>> close
>> sessionrequired
>> pam_loginuid.so
>> # pam_selinux.so open should only be followed by sessions to be executed in
>> the user context
>> sessionrequired pam_selinux.so open
>> env_params
>> sessionoptional pam_keyinit.so force
>> revoke
>> sessioninclude
>> password-auth
>> sessioninclude
>> postlogin
>> # Used with polkit to reauthorize users in remote
>> sessions
>> -session   optional pam_reauthorize.so
>> prepare
>>
>>
>>
>>
>>
>>
>> On Thu, Mar 3, 2016 at 7:11 AM, van Sleeuwen, Berry <
>> berry.vansleeu...@atos.net> wrote:
>>
>> > Hi Tom,
>> >
>> > Could it be the pam configuration for ssh is changed? Perhaps the
>> password
>> > checking in pam?
>> >
>> > I once had such an issue when I made a typo in /etc/pam.d/sshd. After
>> this
>> > I couldn't login anymore. It showed up in the console log as "Error: PAM:
>> > Module is unknown for  from .". (This might be in
>> > /var/log/messages as well.)
>> >
>> > I had to correct the typo using "sed" in the Linux console.
>> >
>> > Met vriendelijke groet/With kind regards/Mit freundlichen Grüßen,
>> > Berry van Sleeuwen
>> >
>> > -Original Message-
>> > From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of
>> Tom
>> > Huegel
>> > Sent: Thursday, March 03, 2016 3:23 PM
>> > To: LINUX-390@VM.MARIST.EDU
>> > Subject: LINUX SSH problem.
>> >
>> > This seems strange to me (a LINUX novice) but I have FEDORA f21 system
>> > that has been working fine until recently.
>> > It seems strange LINUX starts up just fine but when I try to SSH
>> > (Putty) into it I get the initial logon screen but the password is always
>> > rejected.
>> > From the z/VM console I can logon using the same password.
>> >
>> > I must have touched something *&&*&%.
>> > Any idea how to fix it?
>> > Thanks
>> > Tom
>> >
>> > --
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>> > solely for the addressee; it may also be privileged. If you receive this
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MTU size

[Christer Solskogen]

Hi!

On all of my x86_64 Linux boxes the default MTU is 1500. But with SuSE
(both 11 and 12) on s390 they seems to be 1492. How come?

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Re: MTU size

[Christer Solskogen]

Thanks everyone! I've learned something today as well!

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Re: New Subscriber's first question.

[Christer Solskogen]

On Sat, Dec 19, 2015 at 7:14 PM, Mark Post <mp...@suse.com> wrote:
>>>> On 12/19/2015 at 06:12 AM, Christer Solskogen 
>>>> <christer.solsko...@gmail.com>
> wrote:
>> On Fri, Dec 18, 2015 at 9:05 PM, Davis, Jim [PRI-1PP]
>> <jim.da...@primerica.com> wrote:
>>> My kernel parm has cmma=on.
>>> Is there a way to display that it is actually active?
>>>
>>
>> cat /proc/cmdline
>
> That will only show that the parameter was specified when booting the system, 
> not that it actually accomplished anything.  I have a vague memory that a few 
> pseudo files will show up under /proc/sys/vm that start with "cmm_*" if the 
> facility is active.
>
>

True. I might have misunderstood the question.

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Re: New Subscriber's first question.

[Christer Solskogen]

On Fri, Dec 18, 2015 at 9:05 PM, Davis, Jim [PRI-1PP]
 wrote:
> My kernel parm has cmma=on.
> Is there a way to display that it is actually active?
>

cat /proc/cmdline

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Re: SUSE Linux Enterprise Server 12 Service Pack 1 is now available

[Christer Solskogen]

On Wed, Dec 16, 2015 at 11:11 PM, Mark Post  wrote:
> Cross-posted to Linux-390, IBMVM, and IBM-Main.
>
> All,
>
> See $SUBJECT.  You can find the iso images for z Systems at
> https://download.suse.com/Download?buildid=oAh1b3eeGT0~
>


I cant seem to download it. Invalid token.
And if I go the suse.com and download it from there, the System Z page
will send me to ppc64le isos.

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Re: OpenMainframeProject

[Christer Solskogen]

On Sat, Dec 12, 2015 at 3:08 PM, Phil Tully  wrote:
> Yes I am involved with the Linux Foundation Open Mainframe Project. We have a 
> Technical Steering Committee which set the project direction.  We expect to 
> have focus on projects that will benefit running open software on the 
> mainframe.

I just find it interesting that it haven't been mentioned on this list
before now...

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OpenMainframeProject

[Christer Solskogen]

I haven't seen that been discussed here. Are any of you guys involved somehow?

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One zfcp channel, two wwpn

[Christer Solskogen]

Hi!

On some of our servers we have one wwpn on one zfcp channel. But on
others, we have two wwpn. (so we have four wwpn's all sumed up, since
we have two zfcp channels pr. server)

Can anyone explain how that might be?

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Re: One zfcp channel, two wwpn

[Christer Solskogen]

Please ignore. I found it when I spoke to our disk guy.
It seems like the disk is located on a other physical disk system.

On Thu, Nov 26, 2015 at 8:03 AM, Christer Solskogen
<christer.solsko...@gmail.com> wrote:
> Hi!
>
> On some of our servers we have one wwpn on one zfcp channel. But on
> others, we have two wwpn. (so we have four wwpn's all sumed up, since
> we have two zfcp channels pr. server)
>
> Can anyone explain how that might be?
>
> --
> chs

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Re: SLES12 - yast does not create a udev rule

[Christer Solskogen]

Yes, that gave me a hint.
The udev rules does NOT get created if the qeth device is active.
On Nov 10, 2015 15:49, "Mark Post" <mp...@suse.com> wrote:

> >>> On 11/10/2015 at 04:57 AM, Christer Solskogen <
> christer.solsko...@gmail.com>
> wrote:
> > Hi!
> >
> > I've setup the network in YaST, but the device does not start
> > automagicly when I reboot the machine (running as a guest in z/VM). I
> > was pretty sure that YaST would create a file under /etc/udev/rules.d
> > called 51-qeth-0.0.0603.rules (or something) - the address is 603,604
> > and 605.
> > I can get the device to work if I run znetconf -a 603 manually.
> >
> > Help, please!
>
> I've not seen that problem before.  There should be some hint of what went
> wrong in /var/log/YaST2/y2log.  Look for "qeth_configure" to see if some
> sort of error was returned.
>
>
> Mark Post
>
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SLES12 - yast does not create a udev rule

[Christer Solskogen]

Hi!

I've setup the network in YaST, but the device does not start
automagicly when I reboot the machine (running as a guest in z/VM). I
was pretty sure that YaST would create a file under /etc/udev/rules.d
called 51-qeth-0.0.0603.rules (or something) - the address is 603,604
and 605.
I can get the device to work if I run znetconf -a 603 manually.

Help, please!

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Match zFCP lun to device

[Christer Solskogen]

Is there a simple way of matching /dev/sdX to the correct FCP lun?

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Re: Match zFCP lun to device

[Christer Solskogen]

On Thu, Sep 17, 2015 at 1:28 PM, Pedro Henrique dos Santos Principeza
 wrote:
> Christer,
>
> I believe the command:
>
> # lsluns -a
>
> May show what you're looking for.  Here:

Almost. It lists the luns, but not which device they are match to
(only some ambiguous /dev/sdg* device)

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Re: Match zFCP lun to device

[Christer Solskogen]

On Thu, Sep 17, 2015 at 1:40 PM, Berthold Gunreben <b...@suse.de> wrote:
> On Thu, 17 Sep 2015 13:14:07 +0200
> Christer Solskogen <christer.solsko...@gmail.com> wrote:
>
>> Is there a simple way of matching /dev/sdX to the correct FCP lun?
>
> I guess you are searching for something like
>
> lszfcp -D
>
> combined with
>
> multipath -ll
>
> Don't know if a command combines that directly. However, you probably
> should not use /dev/sdX anyways, because with FCP you want to use
> multipath. Instead, you can use
>
> /dev/disk/by-id/dm-uuid-mpath-
>

Ah, yes. But that's the next part :-) Map  luns to which
multipath-devices. But that's easy.

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Re: Match zFCP lun to device

[Christer Solskogen]

On Thu, Sep 17, 2015 at 3:59 PM, Benjamin Block
 wrote:
> If you only have the device-node name at hand and you want to know the
> LUN for investigation purposes or something the like, you could also ask
> udev to tell you its mapping for the node name:
>
>udevadm info /dev/sda | grep zfcp
>

That's the one I was looking for. Thank you!

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Re: SUSE Manager for z Systems

[Christer Solskogen]

On Wed, Aug 19, 2015 at 11:41 PM, Mark Post mp...@suse.com wrote:
 All,

 I'm glad to (finally) be able to announce that our SUSE Manager product is 
 now available for the mainframe.

We've been using this since february. It's working pretty good, but
taskomatic tends to crash (and not able to recover) sometimes. It
needs to be started manually.

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Re: Problem adding a zfcp disk

[Christer Solskogen]

On Wed, Jul 1, 2015 at 5:44 PM, Mark Post mp...@suse.com wrote:

 Did you select the Add function and get luns ?


Yeah, nothing shows up. But I don't recall that has ever worked either
on our setup.

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Problem adding a zfcp disk

[Christer Solskogen]

Hi!

I have trouble adding a lun to a SuSE machine.
I've tried adding the disk with channel, wwpn and lun in YaST. No
error, but the lun does not show in the list Yast - Hardware - Zfcp.
But the lun does show here:
/sys/bus/ccw/drivers/zfcp/0.0.8030/0x5974082a4120/0x002f


But I don't get a linux device! There are many other lun's activated
there (same channel and wwpn) - which works perfectly. But /dev/sdm
(which this lun should be) does not show.
Any pointers?

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Re: Problem adding a zfcp disk

[Christer Solskogen]

On Wed, Jul 1, 2015 at 10:41 PM, Mark Post mp...@suse.com wrote:
 Then I would suggest trying this:
 zfcp_disk_configure 0.0.8030 0x5974082a4120 0x002f


Problem found. The LUN was activate on another server.
But thanks anyways :-)

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Find LUN (zfcp) in use from z/VM?

[Christer Solskogen]

Is there any way to check, from z/VM, if a lun is in use in any of the
virtual machines ?

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Re: Find LUN (zfcp) in use from z/VM?

[Christer Solskogen]

On Fri, May 8, 2015 at 12:02 PM, Berthold Gunreben b...@suse.de wrote:

 I suppose you are talking about emulated DASD, right? In that case, the
 defined EDEV provides you with an rdev that can be queried like other
 DASD too.


No. Or, I don't think so.
I normally have to configure them using yast (zfcp). I'm pretty sure
that is not emulated DASD, as the disks show up as /dev/sdX in Linux.

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Re: Booting, grub etc.

[Christer Solskogen]

On Mon, Apr 20, 2015 at 5:23 PM, Mark Post mp...@suse.com wrote:
 On 4/20/2015 at 07:33 AM, Christer Solskogen christer.solsko...@gmail.com
 wrote:
 Hi again.

 With SLES 12 it seems like grub2 is being used for booting and not
 zipl(?) - I can't find a /etc/zipl.conf*  in SLES 12 at least. Is that
 normal?

 Yes, that is normal.  The zipl command is still used, infrequently, to write 
 out the kernel and ramdisk that are used to get grub2 up and running.  But 
 you shouldn't have to modify the config file for that since that isn't what 
 boots the kernel and ramdisk _you_ care about.

 With SLES 12 I also had some trouble booting the system properly after
 a clean install (it might have something to do with the swap disk I
 mentioned in a earlier mail) - unless I remove any trace of
 resume=/path/to/disk in grub-config. Does having resume on s390 have
 any meaning?

 Absolutely it has meaning, as long as your swap space is large enough to hold 
 all the memory contents that need to be written there.  One caveat there is 
 if you use something like a VDISK or a T-DISK for your paging.  If those go 
 away for any reason, you won't be able to resume the system from where it 
 was paused.



Okay, but why? What do I need resume on s390x for?
I'm sorry if I'm sounding like I'm having an attitude. I *really*
wonder what you use resume on s390x/z/VM for.
Also, you get huge kudos for replying faster than tech support at SuSE :-)

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Re: Booting, grub etc.

[Christer Solskogen]

On Mon, Apr 20, 2015 at 5:28 PM, Berthold Gunreben b...@suse.de wrote:
 On Mon, 20 Apr 2015 13:33:02 +0200
 Hi Christer,

 yes, you might fall over issues in SLES12 when using swapgen. The
 reason is, that dracut by default wants to detect all disks by UUID. To
 fix this, you will have to change the default persistency of dracut to
 by-path instead of uuid...

 to accomplish this, change /etc/dracut.conf and add
   persistent_policy=by-path
 then:
   1. grub2-install
   2. dracut -f


I've already tried that without any luck, but that might be because we
have a old version of swapgen. I'll get back to you when we've
installed the newest one.

 About the resume, this is just for people that want to do suspend to
 disk (and I don't actually know if this even works for s390).

 You should be aware, that to modify the kernel command line, you have
 to edit

 /etc/default/grub

 and afterwards run grub2-mkconfig (which is also stated in a comment at
 the top of that exact file).


Yeap, I know. Thanks :-)

--
chs

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Booting, grub etc.

[Christer Solskogen]

Hi again.

With SLES 12 it seems like grub2 is being used for booting and not
zipl(?) - I can't find a /etc/zipl.conf*  in SLES 12 at least. Is that
normal?

With SLES 12 I also had some trouble booting the system properly after
a clean install (it might have something to do with the swap disk I
mentioned in a earlier mail) - unless I remove any trace of
resume=/path/to/disk in grub-config. Does having resume on s390 have
any meaning?

--
chs

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kernel: Swap area shorter than signature indicates

[Christer Solskogen]

Hi!

In our setup we have two swap disks. One on 300 and one on 301. 300
works fine, but with the 301 swap disk I get the error in subject.
This *only* happens if I logout, if I just reboot (or ipl cms) it
works just fine, so it *might* have something to do with SWAPGEN.

'SWAPGEN 300 524288' /* create a 256M VDISK disk swap space */
'SWAPGEN 301 1048576' /* create a 512M VDISK disk swap space */

In order to fix the problem I have to run mkswap after each logout.

The error only seems to be a problem on our new SLES 12 machines (SuSE
Linux) - but that might as well be a red herring.

I'm a newbie on s390, so please bare with me if I've used the wrong wording.

--
chs

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