HP MSA 2040 CLI Reference Guide

show volumes 341
show volumes
Description Shows volume information for all or specified vdisks.
Syntax
show volumes
[vdisk
vdisks ]
[class standard|ptsnap]
[type snap-pool|mastervolume|snapshot|standard|primary-volume|
secondary-volume|replication-volume]
[
volumes ]
Parameters vdisk vdisks
Optional. A comma-separated list of the names or serial numbers of the vdisks containing the
volumes to show. For vdisk syntax, see "Command syntax" (page 20).
class standard|ptsnap
Optional. Specifies the class of volumes to show.
type snap-pool|mastervolume|snapshot|standard|primary-volume|
secondary-volume|replication-volume
Optional. Specifies the type of volumes to show. The replication-volume option shows primary
and secondary volumes.
volumes
Optional. A comma-separated list of the names or serial numbers of volumes for which to show
information. For volume syntax, see "Command syntax" (page 20).
Output Vdisk
Name of the vdisk
Name
Name of the volume
Size
Volume size
Serial Number
Volume serial number
WR Policy
Cache write policy:
• write-back: Write-back caching does not wait for data to be completely written to disk before
signaling the host that the write is complete. This is the preferred setting for a fault-tolerant
environment because it improves the performance of write operations and throughput. This is the
default.
• write-through: Write-through caching significantly impacts performance by waiting for data
to be completely written to disk before signaling the host that the write is complete. Use this
setting only when operating in an environment with low or no fault tolerance.
Cache Opt
Cache optimization mode:
• standard: Optimizes cache for both sequential and random reads. Appropriate for
applications that read and write small files in random order, such as transaction-based and
database update applications. This is the default.
• no-mirror: When this mode is enabled, each controller stops mirroring its cache metadata to
the partner controller. This improves write I/O response time but at the risk of losing data during
a failover. ULP behavior is not affected, with the exception that during failover any write data in
cache will be lost.