Seagate ST34572WC Specifications download pdf (Page 24)

Appendix A: Procedures

This section contains details on some of the procedures described earlier.

Mirroring the Root Volume on PA-RISC Servers

To set up a mirrored root configuration, you must add a disk to the root volume group, mirror all the root logical

volumes onto it, and make it bootable. For this example, the disk is at path 2/0/7.15.0 and has device special

files named /dev/rdsk/c2t15d0 and /dev/dsk/c2t15d0.

1. Use the insf command with the -e option to make sure the device files are in place. For example:

# insf -e -H 2/0/7.15.0

You should now have the following device files for this disk:

/dev/dsk/c2t15d0

The entire disk (block access)

/dev/rdsk/c2t15d0

The entire disk (character access)

2. Create a physical volume using pvcreate with the -B option:

# pvcreate -B /dev/rdsk/c2t15d0

3. Add the physical volume to your existing root volume group using vgextend:

# vgextend /dev/vg00 /dev/dsk/c2t15d0

4. Use the mkboot command to set up the boot area:

# mkboot /dev/rdsk/c2t15d0

5. Use the mkboot command to add an autoboot file to the disk boot area. If you expect to boot from this disk

only when you lose quorum, you can use the alternate string “hpux –lq” to disable quorum checking:

# mkboot –a “hpux” /dev/rdsk/c2t15d0

1. Use the lvextend command to mirror each logical volume in vg00 (the root volume group) onto the

specified physical volume. The logical volumes must be extended in the same order that they are configured

on the original boot disk. Use the pvdisplay command with the -v option to determine the list of logical

volumes and their order. For example:

# pvdisplay -v /dev/dsk/c0t6d0 | grep 'current.*0000 $'

00000 current /dev/vg00/lvol1 00000

00038 current /dev/vg00/lvol2 00000

00550 current /dev/vg00/lvol3 00000

00583 current /dev/vg00/lvol4 00000

00608 current /dev/vg00/lvol5 00000

00611 current /dev/vg00/lvol6 00000

00923 current /dev/vg00/lvol7 00000

01252 current /dev/vg00/lvol8 00000

In this example, mirror the logical volumes as follows:

# lvextend –m 1 /dev/vg00/lvol1 /dev/dsk/c2t15d0

# lvextend –m 1 /dev/vg00/lvol2 /dev/dsk/c2t15d0

# lvextend –m 1 /dev/vg00/lvol3 /dev/dsk/c2t15d0

# lvextend –m 1 /dev/vg00/lvol4 /dev/dsk/c2t15d0

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Seagate ST34572WC Specifications Page 24