Seagate ST34572WC Specifications download pdf (Page 8)

LVM Command Errors

Sometimes LVM commands, such as vgdisplay, return an error suggesting that a disk has problems. For

example:

# vgdisplay –v | more

…

--- Physical volumes ---

PV Name /dev/dsk/c0t3d0

PV Status unavailable

Total PE 1023

Free PE 173

…

The physical volume status of unavailable indicates that LVM is having problems with the disk. You can get the

same status information from pvdisplay.

The next two examples are warnings from vgdisplay and vgchange indicating that LVM has no contact with a

disk:

# vgdisplay -v vg

vgdisplay: Warning: couldn't query physical volume "/dev/dsk/c0t3d0":

The specified path does not correspond to physical volume attached to this volume

group

vgdisplay: Warning: couldn't query all of the physical volumes.

# vgchange -a y /dev/vg01

vgchange: Warning: Couldn't attach to the volume group physical volume

"/dev/dsk/c0t3d0":

A component of the path of the physical volume does not exist.

Volume group "/dev/vg01" has been successfully changed.

Another sign that you might have a disk problem is seeing stale extents in the output from lvdisplay. If you

have stale extents on a logical volume even after running the vgsync or lvsync commands, you might have an

issue with an I/O path or one of the disks used by the logical volume, but not necessarily the disk showing stale

extents. For example:

# lvdisplay –v /dev/vg01/lvol3 | more

…

LV Status available/stale

…

--- Logical extents ---

LE PV1 PE1 Status 1 PV2 PE2 Status 2

0000 /dev/dsk/c0t3d0 0000 current /dev/dsk/c1t3d0 0100 current

0001 /dev/dsk/c0t3d0 0001 current /dev/dsk/c1t3d0 0101 current

0002 /dev/dsk/c0t3d0 0002 current /dev/dsk/c1t3d0 0102 stale

0003 /dev/dsk/c0t3d0 0003 current /dev/dsk/c1t3d0 0103 stale

…

All LVM error messages tell you which device file is associated with the problematic disk. This is useful for the next

step, confirming disk failure.

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Seagate ST34572WC Specifications Page 8