HP StorageWorks 9100 Extreme Data Storage System administration guide V1.0.2 (AN540-96018, February 2010)

Viewing LUN information
The ExDS> show luns command shows information on all LUNs in the system.
The Role attribute indicates how the LUN is used. Table 3 explains LUN roles:
Table 3 LUN roles
DescriptionState
Reserved for future use.
cfg
LUN is a membership partition (used by Matrix software to manage its cluster).
Normally, a system has three membership partitions - each on a different array.
mp
An unused LUN that can be used as a management partition if the array
hosting an mp LUN is lost.
mpspare
The LUN used to hold the utility filesystem (/var/mxso).adm
An unused LUN that can be used to hold the utility filesystem (/var/mxso)
if the array hosting the adm LUN is lost.
admspare
The LUN used for user data. Generally, these are imported and a filesystem
is created on these LUNs.
data
When the LUN is imported by the Matrix software, Used by shows the psd device name assigned
to that LUN.
The HP ExDS9100cc controllers manage RAID logic of logical disks. If a disk is replaced, the HP
ExDS9100cc controller automatically rebuilds to the replaced disk. The show lun command shows
the status of the logical drives associated with a LUN. Table 4 explains the logical disk states:
Table 4 Logical disk states
DescriptionState
The logical disk is operating normally with full RAID ADG protections.
Ok
9100 Extreme Data Storage System administration guide 51