I sort of understand what you are saying here, but I had to forward it to our 
LINUX guy and haven't heard back from him..

Has SWAPGEN ben updated recently? .. the version I have was from about MARCH of 
this year.

-----Original Message-----
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
RPN01
Sent: Thursday, July 31, 2008 12:24 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: VDISK-SWAP-SWAPGEN ???


>From one of my systems, here's the contents of /proc/dasd/devices:

iwydzl03:/home/rpn01 # cat /proc/dasd/devices
0.0.0391(ECKD) at ( 94:     0) is dasda       : active at blocksize: 4096,
22500 blocks, 87 MB
0.0.0392(ECKD) at ( 94:     4) is dasdb       : active at blocksize: 4096,
1802880 blocks, 7042 MB
0.0.0393(ECKD) at ( 94:     8) is dasdc       : active at blocksize: 4096,
1802880 blocks, 7042 MB
0.0.0394(ECKD) at ( 94:    12) is dasdd       : active at blocksize: 4096,
1802880 blocks, 7042 MB
0.0.0395(ECKD) at ( 94:    16) is dasde       : active at blocksize: 4096,
5896620 blocks, 23033 MB
0.0.0396(ECKD) at ( 94:    20) is dasdf       : active at blocksize: 4096,
5896620 blocks, 23033 MB
0.0.0397(ECKD) at ( 94:    24) is dasdg       : active at blocksize: 4096,
5896620 blocks, 23033 MB
0.0.0398(ECKD) at ( 94:    28) is dasdh       : active at blocksize: 4096,
5896620 blocks, 23033 MB
0.0.0399(ECKD) at ( 94:    32) is dasdi       : active at blocksize: 4096,
5896620 blocks, 23033 MB
0.0.039a(ECKD) at ( 94:    36) is dasdj       : active at blocksize: 4096,
1440000 blocks, 5625 MB
0.0.07ff(FBA ) at ( 94:    40) is dasdk       : active at blocksize: 512,
2097152 blocks, 1024 MB
iwydzl03:/home/rpn01 #

The last entry (0.0.7ff) ends up being /dev/dasdk. Using udev, entries for
each disk are made in the path /dev/disk/by-path directory such as follows:

iwydzl03:/dev/disk/by-path # ls
.   ccw-0.0.0395    ccw-0.0.0396    ccw-0.0.0397    ccw-0.0.0398
ccw-0.0.0399    ccw-0.0.039a   ccw-0.0.07ff
..  ccw-0.0.0395p1  ccw-0.0.0396p1  ccw-0.0.0397p1  ccw-0.0.0398p1
ccw-0.0.0399p1  ccw-0.0.039a1  ccw-0.0.07ff1
iwydzl03:/dev/disk/by-path #

(Sorry for the formatting, or lack thereof) The entry I'm interested in for
swap is ccw-0.0.07ff1 (the first partition of ccw device 07ff). This is used
in fstab, as so:

/dev/vg_system/lv_var /var                 reiserfs   acl,user_xattr
1 2
/dev/disk/by-path/ccw-0.0.07ff1 swap    swap    defaults,pri=100  0 0
/dev/vg_system/lv_swap swap                 swap       defaults,pri=50
0 0
devpts               /dev/pts             devpts     mode=0620,gid=5       0
0

This allows me to access the swap without having to know what /dev/dasd?
Device it is, or be worried about it changing positions in the list.
Swapgen, used in a CMS profile which starts the boot process, makes sure
that the swap space is formatted.

--
Robert P. Nix          Mayo Foundation        .~.
RO-OE-5-55             200 First Street SW    /V\
507-284-0844           Rochester, MN 55905   /( )\
-----                                        ^^-^^
"In theory, theory and practice are the same, but
 in practice, theory and practice are different."




On 7/31/08 11:51 AM, "Huegel, Thomas" <[EMAIL PROTECTED]> wrote:

> Tried changing to /dev/dasdb1   ...
> Still getting these messages..
>
> FBA SWAP DISK DEFINED AT VIRTUAL ADDRESS 151 (12498 4K PAGES OF SWAP SPACE)
>
>
> ACTIVATING SWAP-DEVICES IN /ETC/FSTAB..."""
>  [1A..FAILED
>
> ACTIVATING REMAINING SWAP-DEVICES IN /ETC/FSTAB..."""
>  [1A..FAILED
>
> and no swap space gets defined.
>
>
>
> -----Original Message-----
> From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
> Adam Thornton
> Sent: Thursday, July 31, 2008 11:02 AM
> To: LINUX-390@VM.MARIST.EDU
> Subject: Re: VDISK-SWAP-SWAPGEN ???
>
>
> On Jul 31, 2008, at 10:48 AM, Huegel, Thomas wrote:
>
>> /dev/dasdb      swap    swap    sw      0       0
>> /dev/dasda1          /                    ext3
>> acl,user_xattr        1 1
>> devpts               /dev/pts             devpts
>> mode=0620,gid=5       0 0
>> proc                 /proc                proc
>> defaults              0 0
>> sysfs                /sys                 sysfs
>> noauto                0 0
>
> If you didn't run SWAPGEN in FBA mode, you want to swap to /dev/dasdb1.
>
> Adam
>
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