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extents are mapped to an unavailable physical volume. The lvdisplay command shows ’???’ for the physical

volume if it is unavailable.

The problem with this approach is that it is not precise if more than one disk is unavailable; to ensure that multiple

simultaneous disk failures have not occurred, run vgdisplay to see if the active and current number of physical

volumes differs by exactly one.

A third option for determining which logical volumes are on the disk is to use the vgcfgdisplay command. This

command is available from your HP support representative.

If you have mirrored any logical volume onto a separate disk, confirm that the mirror copies are current. For each

of the logical volumes affected, use lvdisplay to determine if the number of mirror copies is greater than zero.

This verifies that the logical volume is mirrored. Then use lvdisplay again to determine which logical extents

are mapped onto the suspect disk, and whether there is a current copy of that data on another disk. For example:

# lvdisplay -v /dev/vg00/lvol1

--- Logical volumes ---

LV Name /dev/vg00/lvol1

VG Name /dev/vg00

LV Permission read/write

LV Status available/syncd

Mirror copies 1

Consistency Recovery MWC

Schedule parallel

LV Size (Mbytes) 300

Current LE 75

Allocated PE 150

Stripes 0

Stripe Size (Kbytes) 0

Bad block off

Allocation strict/contiguous

IO Timeout (Seconds) default

# lvdisplay -v /dev/vg00/lvol1 | grep –e /dev/dsk/c0t5d0 –e ’???’

00000 /dev/dsk/c0t5d0 00000 current /dev/dsk/c2t6d0 00000 current

00001 /dev/dsk/c0t5d0 00001 current /dev/dsk/c2t6d0 00001 current

00002 /dev/dsk/c0t5d0 00002 current /dev/dsk/c2t6d0 00002 current

00003 /dev/dsk/c0t5d0 00003 current /dev/dsk/c2t6d0 00003 current

00004 /dev/dsk/c0t5d0 00004 current /dev/dsk/c2t6d0 00004 current

00005 /dev/dsk/c0t5d0 00005 current /dev/dsk/c2t6d0 00005 current

…

The first lvdisplay command output shows that lvol1 is mirrored. In the second lvdisplay command output,

you can see that all extents of the failing disk have a current copy elsewhere on the system, specifically on

/dev/dsk/c2t6d0. If the disk is unavailable when the volume group is activated, its column contains a ‘???’

instead of the disk name.

With this information in hand, you can now decide how best to resolve the disk failure.

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Seagate ST34572WC Especificaciones Pagina 12

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