When it gives the "exiting to /bin/sh" message, use the shell to check
what you have:
ls -l /dev/disk/by-id/
cat /proc/dasd/devices
cat /proc/cmdline
As other folks have mentioned, maybe the by-id designation has changed for
the device due to the added paths or the z/VM fix. Or maybe some other
issue has caused the devices to disappear. Or perhaps there's a typo that
crept unchecked into the initrd or zipl.conf since the last working boot
attempt. Checking the above info should give some idea of what is
actually there.
Also if /proc/dasd/devices shows the correct dasd devices online you can
even try an override to bring the system up all the way so you can log in
and check and fix things from a full-screen session instead of being stuck
on the z/VM console.
If you're on a z10 you can try doing (assuming IPL device is 0150 and is
showing up as dasda1):
ipl 150 parm root=/dev/dasda1
If you're on a z9 and have the IPL going into an interactive boot menu,
you can add kernel parameters to override the default while giving the
boot section, ex:
zIPL v1.6.3-0.24.5 interactive boot menu
0. default (ipl)
1. ipl
2. Failsafe
Note: VM users please use '#cp vi vmsg <input>'
Please choose (default will boot in 10 seconds):
#cp vi vmsg 1 root=/dev/dasda1
The only thing with the second method is since you have a short time
limit, you'll probably need to prepare the full statement ahead of time in
some text editor so it can be pasted quickly onto the z/VM session when
prompted.
If the /proc/dasd/devices did not show the correct DASD devices then you
can even bring a device online and continue with the rest of boot, ex:
...
Loading ext3
Waiting for device
/dev/disk/by-id/ccw-IBM.75000000029228.8421.86-part1 to appea
r: ..............................not found -- exiting to /bin/sh
$ cat /proc/dasd/devices
$ echo 1 > /sys/bus/ccw/devices/0.0.8100/online
dasd(eckd): 0.0.8100: 3390/0C(CU:3990/01) Cyl:10017 Head:15
Sec:224
dasd(eckd): 0.0.8100: (4kB blks): 7212240kB at 48kB/trk compatible
disk layout
dasda:VOL1/ 0X8186: dasda1
$ exit
exit
fsck 1.38 (30-Jun-2005)
[/bin/fsck.ext3 (1) -- /] fsck.ext3 -a
/dev/disk/by-id/ccw-IBM.75000000029228.84
21.86-part1
/ (/dev/disk/by-id/ccw-IBM.75000000029228.8421.86-part1): clean,
141284/903168 f
iles, 763757/1803036 blocks
fsck succeeded. Mounting root device read-write.
...
Cheers,
- Mark Ver
office: Building 710 / Room 2-RF-10
phone: (845) 435-7794 [tie 8 295-7794]
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