VERITAS Volume Manager 4.1 Hardware Notes

Hardware Notes

Dynamic LUN Expansion

Chapter 114

NOTE If you are upgrading a system to Base-VXVM 4.1, which has PowerPath

installed, and the Cx600 ASL and its associated Cx600 APM are also installed,

you must uninstall both the Cx600 ASL and APM, otherwise the Cx600 will

claim the disks and the PowerPath discs will not be identiﬁed.

If you are upgrading a system to Base-VXVM 4.1, which does not have

PowerPath installed, but the Cx600 ASL and its APM are both installed, then

the Cx600 ASL and its associated APM should not be uninstalled.

Dynamic LUN Expansion

The following form of the vxdisk command can be used to make VxVM aware of the

new size of a virtual disk device that has been resized:

# vxdisk [-f] [-g diskgroup] resize {accessname|medianame} \

[length=value]

The device must have a SCSI interface that is presented by a smart switch, smart array or

RAID controller. Following a resize operation to increase the length that is deﬁned for a

device, additional disk space on the device is available for allocation. You can optionally

specify the new size by using the length attribute.

If a disk media name rather than a disk access name is speciﬁed, the disk group must either

be speciﬁed using the -g option or the default disk group will be used. If the default disk

group has not been set up, an error message will be generated.

NOTE A Storage Foundation license is required to use the vxdisk resize command.

Not installed; the array is not

Cx600

libvxemc.so handles the EMC

Symmetrix array. DMP handles

multipathing.

Not installed, but the array is

Cx600

DMP handle multipathing. Cx600

ASL and Cx600 APM must be

installed

Table 1-3 Scenarious and Required Array Modes (Continued)

PowerPath DMP Array mode