Seagate ST34572WC Spezifikationen PDF herunterladen (Seite 11)

4. Gathering Information about a Failing Disk

Once you know which disk is failing, you can decide how to deal with it. You can choose to remove the disk if

your system does not need it, or you can choose to replace it. Before deciding on your course of action, you must

gather some information to help guide you through the recovery process.

Is the Questionable Disk Hot-Swappable?

This determines whether you must power down your system to replace the disk. If you do not want to power down

your system and the failing disk is not hot-swappable, the best you can do is disable LVM access to the disk.

Is it the Root Disk or Part of the Root Volume Group?

If the root disk is failing, the replacement process has a few extra steps to set up the boot area; in addition, you

might have to boot from the mirror of the root disk if the primary root disk has failed. If a failing root disk is not

mirrored, you must reinstall to the replacement disk, or recover it from an Ignite-UX backup.

To determine whether the disk is in the root volume group, use the lvlnboot command with the –v option. It lists

the disks in the root volume group, and any special volumes configured on them. For example:

# lvlnboot –v

Boot Definitions for Volume Group /dev/vg00:

Physical Volumes belonging in Root Volume Group:

/dev/dsk/c0t5d0 (0/0/0/3/0.5.0) -- Boot Disk

Boot: lvol1 on: /dev/dsk/c0t5d0

Root: lvol3 on: /dev/dsk/c0t5d0

Swap: lvol2 on: /dev/dsk/c0t5d0

Dump: lvol2 on: /dev/dsk/c0t5d0, 0

What Recovery Strategy Do You Have for the Logical Volumes on this Disk?

Part of the disk removal or replacement process is based on what recovery strategy you have for the data on that

disk. You can have different strategies (mirroring, restoring from backup, reinitializing from scratch) for each

logical volume.

You can find the list of logical volumes using the disk with the pvdisplay command. For example:

# pvdisplay -v /dev/dsk/c0t5d0 | more

…

--- Distribution of physical volume ---

LV Name LE of LV PE for LV

/dev/vg00/lvol1 75 75

/dev/vg00/lvol2 512 512

/dev/vg00/lvol3 50 50

/dev/vg00/lvol4 50 50

/dev/vg00/lvol5 250 250

/dev/vg00/lvol6 450 450

/dev/vg00/lvol7 350 350

/dev/vg00/lvol8 1000 1000

/dev/vg00/lvol9 1000 1000

/dev/vg00/lvol10 3 3

…

If pvdisplay fails, you have several options. You can refer to any configuration documentation you created in

advance. Alternately, you can run lvdisplay –v on all the logical volumes in the volume group and see if any

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