Seagate ST34572WC Especificaciones descargar pdf (Pagina 14)

physical extents on that disk to any other disks in the volume group, subject to any mirroring allocation policies.

For example:

# pvmove pvname

You can select a particular target disk or disks, if desired. For example, to move all the physical extents from

c0t5d0 to the physical volume c0t2d0, enter the following command:

# pvmove /dev/dsk/c0t5d0 /dev/dsk/c0t2d0

You can choose to move only the extents belonging to a particular logical volume. Use this option if only certain

sectors on the disk are readable, or if you want to move only unmirrored logical volumes. For example, to move

all physical extents of lvol4 that are located on physical volume c0t5d0 to c1t2d0, enter the following command:

# pvmove -n /dev/vg01/lvol4 /dev/dsk/c0t5d0 /dev/dsk/c1t2d0

Note that pvmove is not an atomic operation, and moves data extent by extent. If pvmove is abnormally

terminated by a system crash or kill -9, the volume group can be left in an inconsistent configuration showing

an additional pseudo mirror copy for the extents being moved. You can remove the extra mirror copy using the

lvreduce command with the –m option on each of the affected logical volumes; there is no need to specify a

disk.

Removing the Disk from the Volume Group

After the disk no longer holds any physical extents, you can use the vgreduce command to remove it from the

volume group so it is not inadvertently used again. Check for alternate links before removing the disk, since you

must remove all the paths to a multipathed disk. Use the pvdisplay command as follows:

# pvdisplay /dev/dsk/c0t5d0

--- Physical volumes ---

PV Name /dev/dsk/c0t5d0

PV Name /dev/dsk/c1t6d0 Alternate Link

VG Name /dev/vg01

PV Status available

Allocatable yes

VGDA 2

Cur LV 0

PE Size (Mbytes) 4

Total PE 1023

Free PE 1023

Allocated PE 0

Stale PE 0

IO Timeout (Seconds) default

Autoswitch On

In this example, there are two entries for the PV Name. Use the vgreduce command to reduce each path as

follows:

# vgreduce vgname /dev/dsk/c0t5d0

# vgreduce vgname /dev/dsk/c1t6d0

If the disk is unavailable, the vgreduce command fails. You can still forcibly reduce it, but you must then rebuild

the lvmtab, which has two side effects. First, any deactivated volume groups are left out of the lvmtab, so you

must manually vgimport them later. Second, any multipathed disks have their link order reset; if you arranged

your pvlinks to implement load-balancing, you might have to arrange them again. The procedure to remove the

disk and rebuild lvmtab is as follows:

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