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Replacing a Primary Boot Drive in a RP7410

System Administration_2
Occasional Contributor

Replacing a Primary Boot Drive in a RP7410

Could someone tell me if the below procedure is what is needed to replace a Mirror'ed Primary Boot Drive in a rp7410.
Save the hardware paths to the disk.

# ioscan –m lun /dev/disk/disk14
/dev/disk/disk14 /dev/rdisk/disk14
/dev/disk/disk14_p1 /dev/rdisk/disk14_p1
/dev/disk/disk14_p2 /dev/rdisk/disk14_p2
/dev/disk/disk14_p3 /dev/rdisk/disk14_p3

**LUN instance number is 14, the LUN hardware path is 64000/0xfa00/0x0, and the lunpath hardware path is 0/1/1/1.0x3.0x0.

# pvchange -a N /dev/disk/disk14_p2 (non-hp9000)
# pvchange -a N /dev/disk/disk14 (hp9000)

Replace the drive

If the system was not rebooted:

# scsimgr replace_wwid –D /dev/rdisk/disk14
This command allows the storage subsystem to replace the old disk’s LUN World-Wide-Identifier (WWID) with the new disk’s LUN WWID. The storage subsystem creates a new LUN instance and new device special files for the replacement disk.

Determine the new LUN instance number for the replacement disk.

For example:

# ioscan –m lun
Class I Lun H/W Path Driver S/W State H/W Type Health Description
disk 14 64000/0xfa00/0x0 esdisk NO_HW DEVICE offline HP MSA Vol
/dev/disk/disk14 /dev/rdisk/disk14
/dev/disk/disk14_p1 /dev/rdisk/disk14_p1
/dev/disk/disk14_p2 /dev/rdisk/disk14_p2
/dev/disk/disk14_p3 /dev/rdisk/disk14_p3
disk 28 64000/0xfa00/0x1c esdisk CLAIMED DEVICE online HP MSA Vol
/dev/disk/disk28 /dev/rdisk/disk28

In this example, LUN instance 28 was created for the new disk, with LUN hardware path 64000/0xfa00/0x1c, device special files /dev/disk/disk28 and /dev/rdisk/disk28, at the same lunpath hardware path as the old disk, 0/1/1/1.0x3.0x0. The old LUN instance 14 for the old disk now has no lunpath associated with it.

Assign the old instance number to the replacement disk.
# io_redirect_dsf -d /dev/disk/disk14 -n /dev/disk/disk28

Restore LVM configuration information to the new disk.
# vgcfgrestore -n /dev/vg00 /dev/rdisk/disk14_p2 (non-hp9000)
# vgcfgrestore -n /dev/vg00 /dev/rdisk/disk14 (hp9000)

Restore LVM access to the disk.
# pvchange –a y /dev/disk/disk14_p2 (non-hp9000)
# pvchange –a y /dev/disk/disk14 (hp9000)

Place boot utilities in the boot area as follows:
# mkboot /dev/rdisk/disk4
Add an autoboot file to the disk boot area as follows:
# mkboot -a "hpux" /dev/rdisk/disk4
James R. Ferguson
Acclaimed Contributor

Re: Replacing a Primary Boot Drive in a RP7410