Re: Consistent Network Device Naming for LOMs coming...

2010-11-20 Thread Tino Schwarze
Hi Andreas,

On Tue, Nov 16, 2010 at 03:42:33PM +0100, Andreas Bergstrøm wrote:

 However, couldn't the entire naming issue be alleviated by adding symlinks
 from ethX to ethomX/enX/lomX to ensure backwards compatibility while
 making things easier to setup on multi-NIC machines?

Unfortunately not since network interfaces break the Unix everything is
a file philosophy. There's no eth0 in /dev. :-(

Tino.

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Re: perc6i alignment?

2010-10-12 Thread Tino Schwarze
On Mon, Oct 11, 2010 at 09:33:35PM -0500, Eugene Vilensky wrote:

 What partition offset should one use when trying to align Windows
 2003, 2008R2, or RHEL 5 partitions to PERC6i characteristics for best
 performance?

Any multiple of your RAID volume's stripe size. What is your RAID
configuration, exactly? IMO, block alignment should only matter for RAID
levels involving checksums. 

Tino.

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Re: perc6i alignment?

2010-10-12 Thread Tino Schwarze
On Tue, Oct 12, 2010 at 03:37:48PM +0100, Robin Bowes wrote:
 On 12/10/10 09:18, Tino Schwarze wrote:
  On Mon, Oct 11, 2010 at 09:33:35PM -0500, Eugene Vilensky wrote:
  
  What partition offset should one use when trying to align Windows
  2003, 2008R2, or RHEL 5 partitions to PERC6i characteristics for best
  performance?
  
  Any multiple of your RAID volume's stripe size. What is your RAID
  configuration, exactly? IMO, block alignment should only matter for RAID
  levels involving checksums. 
 
 Hmm, this is potentially interesting.
 
 We're using PERC 6/i with 4 x 10k 2.5 146GB drives in RAID10.
 
 I currently do a straight-forward CentOS install onto the logical drive,
 creating two partitions, one small one for /boot and the other across
 the rest of the disk which I make an lvm PV and slice it up using lvm.

 The main performance bottleneck for us is write performance for MySQL.
 
 Could I get better performance by doing things differently?

I suppose(!) alignment doesn't matter that much (or at all) for RAID10
(which is the right choice for DB loads with only few disks).

But that's just my gut feeling.

If write performance is the bottleneck, you might want to consider an
external file system journal (on SSD, preferably). But I've only
heard/read that it helps and I don't know about MySQL tuning.

Tino.

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Re: perc6i alignment?

2010-10-12 Thread Tino Schwarze
On Tue, Oct 12, 2010 at 02:57:56PM +, Jefferson Ogata wrote:
 On 2010-10-12 14:52, Tino Schwarze wrote:
  I suppose(!) alignment doesn't matter that much (or at all) for RAID10
  (which is the right choice for DB loads with only few disks).
  
  But that's just my gut feeling.
 
 My gut thinks your gut is wrong about that. :^) Why would RAID10 be
 exempt? The PERC is still going to bunch up disk addressing into RAID
 chunks. If your filesystem blocks aren't aligned with the chunk
 boundaries, you're going to need two disks to seek to satisfy some read
 requests, and four disks for some write requests.

Right. These disks could be doing other stuff instead of reading one
another RAID chunk.

So better always align to stripe size.

Thanks,

Tino.

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Re: Collect info about few dozen servers

2010-10-07 Thread Tino Schwarze
Hi Ruben,

On Thu, Oct 07, 2010 at 10:45:39AM +0200, Ruben Laban wrote:

 I have about 2-3 dozen servers (a mix of SC1425 and PE860) in storage. I'd 
 like to have an as complete as possible inventory of what components each of 
 those servers contain. I'm thinking of: 
 * cpu type/model/speed/etc
 * memory (how many sticks of a certain size)
 * disks
 * raid controller present?
 * cd/dvd drive present?
 * any other info would be a nice bonus
 
 I just tried booting the OMSA Live cd, which after quite some boottime, and 
 using omreport I was able to collect pretty much all the required info. It 
 would take quite some time per server though.
 Ideally I would netboot each server into an omsa enabled environment, from 
 where I could run a script which would dump all info to an usb stick (in a 
 file 
 based on the server's tag).
 
 Anyone have some ideas on how to go about it?

Did you try dmidecode? It outputs quite a lot of stuff...

HTH,

Tino.

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Re: ordering a T610: what options?

2010-09-30 Thread Tino Schwarze
Hi Louis,

*never* order via online shop. Always get a Dell sales person to talk
to. Just tell them what you want, then let them send you an offer. The
price difference is significant (and the Online configurator IMO has
been sucking for years). A sales rep obviously has access to a lot more
configurations (and the knowledge which one to choose).

To answer one of your questions: You may either just order 8 small disks
from Dell if you don't want to pay their premium prices or you could get
the trays from somewhere else (there are other sources on the net).
Getting empty drive trays from Dell has turned out impossible in the
past.

HTH,

Tino.

On Thu, Sep 30, 2010 at 03:00:29PM +0200, Louis-David Mitterrand wrote:

 I am about to order a T610 but find some options baffling.
 
 This will be a backup server with 8 sata disks running linux software
 raid (raid6 mdadm). So it needs no raid hardware, just a competent sata
 controller.
 
 Here are my questions:
 
 - what Raid Connectivity (C0 to C16) should I select?
 
 - which Raid Controller is the best in plain JBOD mode? Which will
   allow 'smartctl' to monitor the individual disks' health?
 
 - do I need to order 8 disks from Dell to get 8 sata hotplug trays
   preinstalled?
 
 - which is best among low-voltage/standard UDIMM/RDIMM ? (there is also
   an Others RAM choice, what is that?)
 
 Thanks,

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Re: PowerEdge R410 Motherboards Ship with malware/trojan in Firmware

2010-07-21 Thread Tino Schwarze
Hi,

On Wed, Jul 21, 2010 at 01:01:51PM -0500, Sabuj Pattanayek wrote:
 I've heard from comments on /. and elsewhere that only replacement
 boards were infected and that Dell has contacted users who received
 these boards. I've got a new unopened R410 with the iDrac Express
 still sitting in the box, so it's probably safe, but I'd feel better
 if there was some utility that could be run to check for the infected
 image and then flash it with the clean image of the embedded OS.
 
 Sabuj Pattanayek
 
 On Wed, Jul 21, 2010 at 11:30 AM, Brian A. Seklecki
 laval...@spiritual-machines.org wrote:
 
  Oh man:
 
  http://www.newscientist.com/blogs/shortsharpscience/2010/07/pc-giant-warns-of-hardware-tro.html
 
  http://en.community.dell.com/support-forums/servers/f/956/t/19339458.aspx

Citing this URL:

1.   This issue does not affect any Dell PowerEdge servers shipped
from our factories  and is limited to a small number of the replacement
motherboards only which were sent via Dell’s service and replacement
process for four servers: PowerEdge R310, PowerEdge R410, PowerEdge R510
and PowerEdge T410.  The maximum potential exposure is less than 1% of
these server models.
2.   Dell has removed all impacted motherboards from the service
supply. New shipping replacement stock does not contain the malware.
3.   The W32.Spybot worm was discovered in flash storage on the
motherboard during Dell testing. The malware does not reside in the
firmware.
4.   All industry-standard antivirus programs on the market today
have the ability to identify and prevent the code from infecting the
customer’s operating system. 
5.   Systems running non-Microsoft Windows operating systems cannot
be affected.
6.   Systems with the iDRAC Express or iDRAC Enterprise card
installed cannot be affected. 
7.   Remaining systems can only be exposed if the customer chooses
to run an update to either Unified Server Configurator (USC) or 32-bit
Diagnostics.  

HTH,

Tino, (not affiliated with Dell!)

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Re: GParted Support for Dell PERC Cards?

2010-07-08 Thread Tino Schwarze
Hi James,

On Thu, Jul 08, 2010 at 02:52:48PM +0100, James Bensley wrote:

 Knowers-of-all;

Not yet. ;)

 I am wanting to alter the partition sizes of a Windows Server 2003 box
 we have and I was planning to boot up with a GParted Live CD but will
 it be able to see my NTFS partitions to resize them?
 
 The box in question is a PE1950 with a Perc 5/i with two SATAII drives
 in a hardware RAID1, on that sits two Logical Volumes, ignore volume
 1; on volume 0 there are two partitions C: and P: and I want to shrink
 P: and then grow C: but does anyone know if Gparted can see NTFS
 partitions, on a LV, on the hardware RAID on a Perc 5/i? Seems a bit
 far fetched to me?

Just try it. ;-) It should work since the PERC drivers have been part of
standard Linux kernels for quite some time and GParted is based on
rather recent kernels. The kernel driver will make your LVs appear as
/dev/sda and /dev/sdb, GParted should know about the rest.

HTH,

Tino.

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Re: Moving PD slots while preserving VD

2010-06-30 Thread Tino Schwarze
Hi Ken,

On Tue, Jun 29, 2010 at 05:36:39PM -0700, Ken Nishimura wrote:

 I'm halfway through a disk migration to increase space and now want to
 poll the group before proceeding...
 
 OLD: One virtual disk (Virtual Disk 0) comprised of two 146 GB physical drives
 in controller slots 0 and 1.  This was the system disk.
 
 WANT: One virtual disk (named Virtual Disk 0) comprised of two 300 GB 
 physical drives in controller slots 0 and 1.  This will be the new system 
 disk.
 
 Steps taken so far:
 
 1) Inserted two 300 GB physical drives in controller slots 2 and 3 and
 created Virtual Disk 1.
 
 2) Copied all the info from Virtual Disk 0 to Virtual Disk 1.
 
 3) Rebooted into PERC BIOS, and:
 
   a) Forced offline the two 146 GB drives.  This made VD0 disappear
   as expected.
 
   b) Physically removed the two 146 GB drives.
 
 4) This worked fine.  Machine rebooted and now on a larger virtual disk.
 
 What I want may seem petty, but I'd like to move the two physical disks
 from slots 2 and 3 back into slots 0 and 1, and rename the VD from
 Virtual Disk 1 to Virtual Disk 0.
 
 The rename is trivial, but moving disks scares me.  Am I correct in
 fearing that if I were to force offline the two drives and move them
 from slots 2/3 into slots 0/1, that things would go awry?
 
 What is the safe way (if any) of moving the disks?

Simply power off the machine, pull all disks, insert in desired order.
The controller should pick them up - slot position does not matter since
config is stored on disk.

HTH,

Tino.

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Re: dell 2850 initrd problem.

2010-06-03 Thread Tino Schwarze
Hi Ron,

the typical solution in such a case is: Restore from backup. :-|

On Thu, Jun 03, 2010 at 11:27:42AM -0400, Ron Croonenberg wrote:

 I found the FC3  rescuecd somewhere it is  2.6.12-1.667
 (that was what was initially installed.)
 
 
 btw:  I remember, before the reboot with the kernel panic, that  when I 
 booted the machine it said it booted from an unclean shutdown (or 
 something along that road).
 I thought a reboot would take care of that (but probably not with broken 
 raid memory)
 
 I tried to boot with all 4 kernels (667,  1381 both  regular and smp)  
 and they all give me the same error.
 
 I mounted the file system with the rescue cd and saw the following.
 
 there is nothing in  /mnt/sysimage/initrd(so if it tries to do 
 something with /initrd/dev I understand that can't work)
 
 I also checked what is in  /etc (/mnt/sysimage/etc)   with:
 
 ls /mnt/sysimage/etc/in*
 
 I get:
 
 /etc/init-d Input/Output error
 /etc/inittab Input/Output error
 /etc/initlog.conf Input/Output error
 
 (btw, other places don't seem affected,  it looks like all the data etc 
 is there)

 Maybe I should run fsck on that drive (it is a raid) first, and than try 
 and see what happens?
 
 Can I (I how do I) run fsck from the rescue cd?

I'd suggest running rpm --verify -a, then re-installing the affected 
packages. Of course, do 1) backup first, 2) run e2fsck on the partition.
Input/Output error is either a sign of severe filesystem corruption or a
sign of hardware failure - check your logs!

Recue CDs are design to allow fsck ;) - figure out the device, then use
it to run fsck. BE SURE TO HAVE BACKUPS! If the RAID had a problem, both
disks might be broken in different ways - I would not trust that data
without some serious integrity checks or similar.

HTH,

Tino.

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Re: SAS 5/iR raid migration

2010-05-12 Thread Tino Schwarze
Hi Ben,

On Wed, May 12, 2010 at 10:01:19AM +0100, Ben Tisdall wrote:

 I wonder if someone could confirm to me that non-destructive  raid
 level migration (1 = 0) is NOT possible with the SAS5/iR controller?

Such conversion would be very risky, to say the least. (In RAID1, you
have a copy of each data block on both disks, in RAID0, you distribute
data blocks evenly: block0 - disk0, block1 - disk1, block2 - disk0,
block3 - disk1 etc.) Apart from that, the SAS 5/iR is a rather stupid
controller with no fancy logic etc, so I guess it's simply not supported.

 From the lack of that option in VD menu I assume that is the case,
 unless it's matter of a driver version:
 
 Firmware Version  00.10.51.00.06.12.05.00
 Driver Version3.04.03
 Minimum Required Driver Version   3.12.29.00
 
 This is OM 6.2 on Fedora 6 (cannot be upgraded to suit unfortunately).

OMSA or OS version shouldn't matter at all.

Tino.

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Re: PE2950, LSI SAS - SATA very slow

2010-05-04 Thread Tino Schwarze
On Tue, May 04, 2010 at 10:32:25AM +1000, Adam Nielsen wrote:
  10MB/sec does seem extremely poor. we've had read slowness when Linux block
  device read-ahead was too small. Once properly configured, performance on
  RAID-5 went from 150MB/sec to 500MB/sec, so the difference is dramatic. we
  usually tune read-ahead (in Linux) buffers starting from 8MB to 32MB and
  benchmark to see what works best. but your problem may be elsewhere... we've
  never seen 10MB/sec...
 
 Have you got any pointers to where this can be adjusted?  It seems 
 (according to Google) there are countless methods and patches, most of 
 which are for rather old kernel versions.

man blockdev
blockdev --setra blocks /dev/sda

It is part of util-linux-ng .

HTH,

Tino.

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Re: Expand nonraid to raid

2010-04-21 Thread Tino Schwarze
Hi Magnus,

On Wed, Apr 21, 2010 at 09:43:38AM +0200, Magnus Ringdahl wrote:

 I have a PE1950 with sas 6iR controller with one hdd.
 I wonder if its possible to add an identical hdd and create a raid-1 
 array, without reinstallation of OS?
 Does it mean i have to clone the drive?

As far as I know, this is not possible since any RAID setup will need
some bytes of Metadata at the start or end of a partition/device. 

BTW: If the 6i/R is similar to the 5i/R, do not trust it's RAID
capabilities but use software RAID instead. This is just an el-cheapo
RAID controller without any of the advanced features of real hardware
RAID. We're suffering from an 5i/R on one of our machines - it's
performance is abysmal.

You don't need to reinstall if you boot from a CD, then setup software
RAID devices on the new disk (with one missing device), copy everything
over, then create the devices on the old disk and let the software RAID
do the sync. If you've got LVM in place, things will get easier.

HTH,

Tino.

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Re: Hot disk change.

2010-04-20 Thread Tino Schwarze
Hi Fabio,

do you have some kind of LVM or other means of volume management in
place? What's your partition setup like? Please post output of
df -h.

Tino.

On Tue, Apr 20, 2010 at 11:28:58AM -0300, Fabio Catunda wrote:
 Thanks for all responses.
 
 Now I see that I am in trouble.
 
 I really cannot install everything from zero, it will take too long and 
 might not work.
 
 I would like to know your opinion about the following procedure:
 1 - Shutdown
 2 - Remove both disks
 3 - Plug both 2TB new disks and create a new virtual disk on the controller
 4 - Plug one of the old 250GB disks in a separate SATA connector
 5 - dd if=/dev/sdb of=/dev/sda (where sdb is the old disk and sda is the 
 new virtual disk)
 6 - fstab, resize2fs, etc, etc...!
 
 I really don't know if the OS will recognize and be able to read the old 
 disk plugged in another SATA connector.
 
 Thanks in advance.
 
 Fábio Catunda.
 
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Re: Vendor ID?

2010-02-17 Thread Tino Schwarze
On Tue, Feb 16, 2010 at 03:06:02PM -0500, Steve Thompson wrote:
 On Tue, 16 Feb 2010, Stephan van Hienen wrote:
 
  Controller PERC 6/i Adapter (Slot 3)
  ID: 0:0:0
  Status: Ok
  Name  : Physical Disk 0:0:0
  [..]
  Vendor ID : SEAGATE
  Product ID: ST31000640SS
 
 How interesting! I have (disks not sourced from Dell):
 
 Vendor ID : DELL
 Product ID: ST3750330NS

Similar here:

Controller PERC 5/i Integrated (Embedded)
Vendor ID : DELL
Product ID: Hitachi HUA721075KLA330

Vendor ID : DELL
Product ID: WDC WD7502ABYS-02A6B0

These are SATA disks and have not been supplied by Dell.

Tino.

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Re: Third-party drives not permitted on Gen 11 servers

2010-02-16 Thread Tino Schwarze
Hi there,

On Thu, Feb 11, 2010 at 11:52:04AM +0100, Tino Schwarze wrote:

 I mailed my sales rep yesterday explaining my concerns and got a reply
 today that he'll ask the marketing department for an official statement.

I got an answer today (German, English translation below):

 [...] Ich kann Sie voll und ganz verstehen. DELL hat sich entschieden an
 dieser Stelle den gleichen Weg zu gehen wie die Konkurrenz (HP,IBM). Das
 heisst auch bei den anderen werden Sie dort kein Glück haben was diese
 Sache an geht.  Zur Zeit kann ich Ihnen dann nur den Perc 6i empfehlen
 solange dieser noch zur Verfügung steht. Falls Sie hierzu noch weitere
 Fragen haben sollten, dann rufen Sie mich bitte kurz an. Vielen Dank für
 Ihr Verständnis.
 
 P.S. ich hätte Ihnen gerne eine andere Auskunft gegeben :-/ 

Rough translation: I do fully understand you. DELL decided to go the
same route as it's competitors (HP, IBM). Which means you'll be out of
luck there as well regarding this issue. For the time being I can only
recommend the PERC 6i as long as it is available. Please call me if
you've got further questions. Thank you for your understanding.
PS: I'd rather given you a different information. 

End of translation.

Tino.

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Re: Third-party drives not permitted on Gen 11 servers

2010-02-11 Thread Tino Schwarze
Hi there,

I mailed my sales rep yesterday explaining my concerns and got a reply
today that he'll ask the marketing department for an official statement.

Tino.

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Re: help configuring a db server

2010-02-10 Thread Tino Schwarze
On Wed, Feb 10, 2010 at 03:35:06PM -0600, Eric Rostetter wrote:

  for under $6000. But I'm confused about disk. I would think disk pspeed
  would be fairly important. How can I configure a machine with a fast disk?
  What are my options from Dell in that regard?
 
 Get the fastest RAID controller you can and are comfortable with, and as many
 of the fastest disks you can afford as you can fit in the machine.
 
 Since you want to stay under $6000, using SSD or FusionIO is probably out.
 I would think (haven't verified) that you could buy 4 (or 5) 15K RPM SAS
 drives in your price range, setup as a RAID 10.  If not, try 10K RPM SAS
 drives.  If that fails, well, there is always SATA...
 
 I personally like to buy 7 drives: 2 RAID-1 for the OS, 4 RAID-10 for the
 MySQL databases, and 1 hotspare.  But, if you need to keep costs down, you
 can dump the RAID 1 and just do 5 drives (RAID 10 plus hot-spare).
 
 You'd have to spec all that one Dell's web site to see if it comes in
 under $6K.  If not, just start dropping down until you hit your mark
 (from 7 drives to 5, from 15K SAS to 10K SAS to SATA).

Be sure to mail/call your Dell sales rep. I've seen pretty nice
discounts, just by going through the sales rep. You may outsource the
hassle of what exact drive/config to choose to them - just specify your
requirements (as fast as possible, at least xx GB, ..., for under $6K).

BTW: Don't even consider RAID-5.

HTH,

Tino.

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Re: R410's shipped out with BIOS showing 4 cores instead of 8

2010-02-01 Thread Tino Schwarze
Hi Robert,

On Mon, Feb 01, 2010 at 06:02:10PM +0100, Robert von Bismarck wrote:

[...]
   R410's R710 and R510 all are doing this currently (says my TAM).
  
  I can't say why but I was told it's a feature not a bug. 
  Very non-intuitive to me. I can't see why an 8 core server 
  defaulting to 4 core makes sense.
  
 
 We got two R410 exhibiting the same feature here.
 It's probably a feature for some alternative OS's that require
 licensing on a per-core basis.
 For higher performance, is it better to have two quad-core acting as
 dual-core processors due to bios setting, or one quad-core ?

I suppose, the only valid answer is: Do your own benchmarks. It depends
on such a lot of factors (data locality, hardware architecture details,
cache coherency, bus contention etc. pp) that you simply cannot predict
how your particular application will perform.

HTH,

Tino.

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disabling compression for tapes?

2009-12-22 Thread Tino Schwarze
Hi there,

while not totally PowerEdge-related, I suppose, there are enough folks
operating tape equipment under Linux. I've got an LTO-3 autoloader
(Quantum Superloader 3 - there's some Dell-rebranded version of that as
well) and it looks like it has compression enabled and I cannot find a
way to disable it (it's useless - the tapes only get compressed data
anyway).

 mt -f /dev/nst0 datcompression 0
Compression off.

But the web interface still says: Compression enabled. (No tape
currently loaded.) The above mt utility is from cpio-2.6...

Any hints?

Thanks,

Tino.

-- 
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www.lichtkreis-chemnitz.de
www.tisc.de

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Re: Starting OMSA manually?

2009-11-24 Thread Tino Schwarze
Hi Josh,

On Mon, Nov 23, 2009 at 02:43:37PM -0600, Baird, Josh wrote:

 I'm trying to figure out how to start OMSA 5/6 manually without using
 srvadmin-services.sh or rebooting.  Here is what I am trying:
 
  
 
 service dsm_om_shrsvc start
 
 service instsvcdrv start
 
 service dataeng start
 
 service dsm_om_connsvc start
 
  
 
 This seems to be the order that is executed upon rebooting.. however it
 does not work.  Here is what ends up running after these commands are
 executed:
 [...]
 Any idea on what init scripts (and in what order) should be executed to
 do this?

Looking at /etc/init.d/rc3.d of an 6.1 install here reveals the
following order:

dkms_autoinstaller
mptctl
instsvcdrv
dataeng
dsm_om_shrsvc

I've had success with running OMSA manually that way.

HTH,

Tino.

-- 
What we nourish flourishes. - Was wir nähren erblüht.

www.lichtkreis-chemnitz.de
www.tisc.de

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Re: Using updated JRE with Openmanage

2009-11-17 Thread Tino Schwarze
On Mon, Nov 16, 2009 at 04:17:44PM -1000, Alvarez, Angelo CIV NMFC_JTWC wrote:

 Aloha.  Periodically, there are Java vulnerabilities requiring me to
 update Java software to the latest version.  With the Dell Openmanage,
 I normally copy all .jar files from srvadmin/jre/lib/ to
 /usr/java/latest/lib/.  Are there any issues with this approach?

Yes. First: It's the wrong way around. Second: There is more to Java
than just .jar files - there are lots of .so etc. JAR files actually
rarely contain security issues, it's mostly the binaries which make up
the JVM.

HTH,

Tino.

-- 
What we nourish flourishes. - Was wir nähren erblüht.

www.lichtkreis-chemnitz.de
www.tisc.de

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