boot 7410 npar

[Rick Garland]

Hi all:

Got HPUX 11.11 on rp7410. Replaced a failed primary root mirror disk. The vgdisplay shows the device unavailable. HP CE said to reboot the box and it will spin up.

Question, is this true? In rebooting the system will I affect the other npar on the same system? What other tasks do I need to perform to get this disk back into play as the primary root disk?

[Steven E. Protter · Accepted solution]

You probably need to run pvcreate on the disk to get it recognized.

This may or may happen at boot depending on /etc/lvmtab configuration.

If you have an Ignite vg00 backup tape, you can boot off that tape and rebuild the system, vg00 only the way it was before the failure.

What you need to do depends on your backup methodology and what was on the disk.

What was on the disk? All ov vg00, you either do an Ignite restore or possbily cold install of the OS.

Tell me more and I'll give more advice.

SEP

[Sridhar Bhaskarla]

Rick,

RP7410's disks are hot-pluggable. Did you run

'ioscan -f' before running vgdisplay?. If ioscan still shows it as 'NO_HW', then the HP CE may have to re-seat it. Do you see any suspecious LED activity on the disk?. Like the LED continuously on or no power etc.,I suggest you have a look at RP7410's documentation (docs.hp.com) on how the disks are allocated to nPars. Check to see if he replaced a wrong disk.

Rebooting is not necessary. You don't need to worry about other nPar if you decided to reboot. It will not be affected as long as the CE replaced the harddisk belonging to this nPar.

-Sri

[Rick Garland]

This disk was a vg00 disk - all vg00. This is a primary root disk, the first half of the mirror. The secondary mirror of the root disk is intact and is continuing to run the system.

[RAC_1]

Is the disk hot pluggable?? Can you get it on ioscan?? If it is, do pvcreate -B on it, include it in vg00 and
vgcfgrestore -n /dev/vg00 /dev/dsk/cxtxdx
vgchange -a y vg00
vgsync

Rebooting npar will not affect other npar.

Anil

[Sridhar Bhaskarla]

Hi Rick (Again):

Before you can see it part of VG and after it is claimed in the 'ioscan -f', you will have to follow the boot mirror restore process. There are many threads on restoring the mirror disk. Basically until the vgcfgrestore is done (after making it a boot disk) to restore the LVM headers on the disk and the VG is re-activated, it will not be recognized as part of the volume group.

-Sri

[Rick Garland]

The ioscan reports the device as claimed. The CE stated that there is a patch to have the disks switch from hot swap to hot plug. It is a PHKL patch so a reboot is called for regardless.

Seems like I should be able to synchronize the new primary root disk with the existing secondary root disk and be in business?

[Sridhar Bhaskarla]

Yep. Once you follow the mirror boot disk process - (pvcreate, mkboot, vgcfgrestore, vgchange, vgsync) you should see the PV as claimed in vg00.

-Sri

[Rick Garland]

Hi all:

Many thanks!