VG01 not mounting after reboot

[Tracie Davis]

Hi All,

I am using a HP900/J210xc/770 10.20 box. I was going to remove an external scsi drive which had a lv on it. Then I changed my mind. When I connected it back up and rebooted the system, the system will not come back on line unless I turn that drive off. It sat at the "looking of LVM that are available" and never moved. The lights on the external drive is flickering on and off like its trying to do something. Why isn't it not mounting anymore? How can I fix this problem?
This external disk drive contains some online backups I created. Nothing that the system needs.

Please help!!!!!!!!!!!!!!!!

[Murray Jones]

Tracie,

Double check that you have not bumped (re-assigned) the scsi-id's on the external unit, and also confirm external scsi cabling - is it still terminated? The system really hates it when it tries to probe the scsi bus and finds two of the same thing. If the unit has mulitple scsi-id's for multiple devices, confirm them all - they should be unique.

If you can't remember the scsi id it should be (you don't have it written down?) you can delve a bit deeper. Remove the drive (be sure to terminiate the exposed connector. Interrupt the boot sequence and search for boot paths - you should see the scsi id's for the units you have on the chain. The ID you're after won't be one of these. From memory, disk drive ID's tend to be issued lower in the scsi-id range, whereas tape drives etc tend to be higher - but there's no guarantee that's how yours was configured.

Hope that helps,

Cheers,

Murray

[Denver Osborn]

It seems as though the controler instance number for the external drive may have changed after disconnecting/reconnecting the drive. If this happened then the device file would be different and lvm would think the drive is no longer there. Here's one suggestion, export vg01 and then import it.

Boot to su mode.
-Interrupt boot (10 sec message hold esc)
-from main menu type: boot pri isl
-yes to interract w/ ipl
-from ISL prompt type: hpux -is

# vgexport -v -s -m vg01.map /dev/vg01

# mkdir /dev/vg01

# mknod /dev/vg01/group c 64 0x010000

# vgimport -v -s -m vg01.map /dev/vg01

# vgchange -a y /dev/vg01

# shutdown -ry 0

-If all goes well your box will boot back up and vg01's filesystems will be mounted. Hope this helped!