HP MSA 1040 HP MSA 1040 CLI Reference Guide (762782-001, March 2014) - Page 330

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. 330