Hi Scott,

I think you may be running into problems because the Debian kernel is
compiled with the DEVFS option turned on.  You need to reference your
dasd with /dev/dasd/xxxx where xxxx is the device address instead of
/dev/dasda /dev/dasdb etc.

Lonny

-----Original Message-----
From: Scott Chapman [mailto:[EMAIL PROTECTED]]
Sent: Monday, January 27, 2003 7:36 AM
To: [EMAIL PROTECTED]
Subject: DASD not recognized in Debian


I wanted to install Debian on one of our virtual servers just to see it
work and possible to keep around as a "demo" system if we don't move
forward witha full SuSE/VM installation at this time.  Unfortunately I
haven't been successful.

I took down one of the virtual servers, and attached it's minidisk to
another one running SuSE.  I then used debootstrap to install the base
configuration on that minidisk.  I then configured the base Debian image
and ran zipl to make it bootable.  I detached the minidisk from the SuSE
system, logged on to the VM userid for the Debian system and tried to IPL
it (device 151).  It seemed to start the boot process ok, but it fails
trying to access the ext2 filesystem on the minidisk that has the root
filesystem--which is the same minidisk it was booting off from.  I can
re-attach the minidisk to the SuSE system and access the file system fine,
but I can't even do an fdasd on the volume from the Debian system--almost
like Debian isn't recognizing the DASD at all, despite being able to boot
from it.

I've probably missed something "obvious"--if somebody could point it out to
me, I'd appreciate it.

Thanks!

Scott Chapman
American Electric Power

  dasd: initializing...
  debug: dasd: new level 3
  dasd: Registered successfully to major no 94
  dasd(eckd): ECKD discipline initializing
  dasd(eckd): /dev/dasdb  ( 94:  4),0151@03: 3390/0A(CU:3990/01) Cyl:1365
Head:15
  Sec:224
  dasd(eckd): /dev/dasdb  ( 94:  4),0151@03: 3390/0A(CU:3990/01):
Configuration da
  ta read
  debug: dasdb: new level 3
  dasd(eckd): /dev/dasdb  ( 94:  4),0151@03: (4kB blks): 982800kB at
48kB/trk comp
  atible disk layout
  dasd(eckd): /dev/dasdc  ( 94:  8),0152@04: 3390/0A(CU:3990/01) Cyl:50
Head:15 Se
  c:224
  dasd(eckd): /dev/dasdc  ( 94:  8),0152@04: 3390/0A(CU:3990/01):
Configuration da
  ta read
  debug: dasdc: new level 3
  dasd: waiting for responses...
  dasd(eckd): /dev/dasdc  ( 94:  8),0152@04: (4kB blks): 36000kB at 48kB/trk
compa
  tible disk layout
  Partition check:
   /dev/dasd/0151:VOL1/  0X0180: p1
   /dev/dasd/0152:VOL1/  0X0152: p1
  Checking root file system...
  fsck 1.27 (8-Mar-2002)
  fsck.ext2: No such file or directory while trying to open /dev/dasdb1
  /dev/dasdb1:
  The superblock could not be read or does not describe a correct ext2
  filesystem.  If the device is valid and it really contains an ext2
  filesystem (and not swap or ufs or something else), then the superblock
  is corrupt, and you might try running e2fsck with an alternate superblock:
      e2fsck -b 8193 <device>

Even trying to run fdasd fails on Debian:
  (none):~# fdasd /dev/dasdb
  fdasd /dev/dasdb

  fdasd error:  device verification failed
  The specified device is not a valid DASD device
  (none):~#

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