vg01 config hosed in SAM, now can't create additional groups

[Matthew Byrd]

Hello everyone. I'm running a 715/50 with HP-UX 10.20. I tried to configure a second hard drive as part of a new volume (vg01). SAM was unable to create the group, and told me to check the device minor number of the new device file "group" in /dev/vg01, which showed major/minor of 64/0x0010000 (unique on this system). vg00 has a group file on a different minor number. I have already added this drive to vg00 just to get it running for now, but I am really perplexed as to how to fix the larger issue. I have already deleted/rebuilt the lgtab, and have deleted the vg01 directory from /dev. It doesn't show up anywhere that I can see, and the scan comes back clean with just vg00, but there is obviously some file stopping this process. Any pointers ?

[Karthik S S · Accepted solution]

Hi Mathew,

The minor number should be 0x010000 not 0x0010000 ... I think that will solve your problem.

-Karthik S S

[Michael Tully]

Try to create it manually:

# pvcreate /dev/rdsk/cxtydz (sub your disk id here)
# mkdir /dev/vg01
# mknod /dev/vg01/group c 64 0x010000
# vgcreate /dev/vg01 /dev/dsk/cxtydz

Once this is successful, you should be able to create whatever logical volumes you like. I believe SAM tries to use the next available minor number. You can use whatever number you like (within reason) like 0x020000 or 0x030000

[Steven E. Protter]

You may need to go through a vgexport vgimport process to restore the situation.

SEP

[Brian Vance]

The procedure above should work. One tip to choose a minor number.
ls -l /dev/*/group will give a list of already used minor numbers.

[Gerhard Roets]

Hi

Maybe the number is typed incorrectly in itrc. I can not say where the mistake is off course.

His minor number was, with the number of digits below.
0x0010000
001234567
A minor number should only contain 6 digits.

If i do an "mknod 0x0010000" the machine rewrites is to "0x010000" as a side note. This is off course correct behaviour in this case.

Regards
Gerhard

[Matthew Byrd]

Thanks, everyone, I'll take a look at it, and see if my memory was correct about the minor number. I am pretty sure it was showing *7* digits, though. I remember thinking it was an odd-looking number when I first saw it. If the minor number really is hosed, I'll try to do the mknod first, then go the vgexport/vgimport route. Thanks for all your help ! - Matt