HP Veritas Volume Manager 5.0 -UX 11i v3 manual Following is an extract from typical output

470Performance monitoring and tuning

Performance monitoring

Such output helps to identify volumes with an unusually large number of operations or excessive read or write times.

To display disk statistics, use the vxstat -dcommand. The following is a typical display of disk statistics:

		OPERATIONS		BLOCKS		AVG TIME(ms)
TYP	NAME	READ	WRITE	READ	WRITE	READ	WRITE
dm	mydg01	40473	174045	455898	951379	29.5	35.4
dm	mydg02	32668	16873	470337	351351	35.2	102.9
dm	mydg03	55249	60043	780779	731979	35.3	61.2
dm	mydg04	11909	13745	114508	128605	25.0	30.7

If you need to move the volume named archive onto another disk, use the following command to identify on which disks it lies:

#vxprint -g mydg -tvh archive

The following is an extract from typical output:

V	NAME	RVG/VSET/CO	KSTATE	STATE	LENGTH	READPOL	REFPLEX	UTYPE
PL	NAME	VOLUME	KSTATE	STATE	LENGTH	LAYOUT	NCOL/WDTH	MODE
SD	NAME	PLEX	DISK	DISKOFFS	LENGTH	[COL/]OFF	DEVICE	MODE
v	archive	-	ENABLED	ACTIVE	20480	SELECT	-	fsgen
pl	archive-01	archive	ENABLED	ACTIVE	20480	CONCAT	-	RW
sd	mydg03-03	archive-01	mydg03	0	40960	0	c1t2d0	ENA

Note: Your system may use device names that differ from these examples. For more information on device names, see “Administering disks” on page 77.

The subdisks line (beginning sd) indicates that the volume archive is on disk mydg03. To move the volume off mydg03, use the following command:

#vxassist -g mydg move archive !mydg03 dest_disk

Here dest_disk is the destination disk to which you want to move the volume. It is not necessary to specify a destination disk. If you do not specify a destination disk, the volume is moved to an available disk with enough space to contain the volume.

For example, to move a volume from disk mydg03 to disk mydg04, in the disk group, mydg, use the following command:

#vxassist -g mydg move archive !mydg03 mydg04

This command indicates that the volume is to be reorganized so that no part of it remains on mydg03.

Note: The Veritas Enterprise Administrator (VEA) has a graphical user interface (GUI), which provides an easier way to move pieces of volumes between disks. You may find that approach preferable to using the command line.