HP MSA 1040 CLI Reference Guide (762782-001, March 2014)
volumes 493
cache-
optimization
string • 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.
cache-
optimization-
numeric
uint32 Numeric equivalents for cache-optimization values.
• 0: standard
• 2: no-mirror
read-ahead-size string The volume's read-ahead cache setting.
• Disabled: Read-ahead is disabled.
• Adaptive: Adaptive read-ahead is enabled, which allows the controller to
dynamically calculate the optimum read-ahead size for the current workload.
• Stripe: Read-ahead is set to one stripe. The controllers treat non-RAID and
RAID-1 vdisks internally as if they have a stripe size of 512 KB, even though
they are not striped.
• 512 KB, 1 MB, 2 MB, 4 MB, 8 MB, 16 MB, or 32 MB: Size
selected by a user.
read-ahead-
size-numeric
uint32 Numeric equivalents for read-ahead-size values.
• -2: Stripe
• -1: Adaptive
• 0: Disabled
• 524288: 512 KB
• 1048576: 1 MB
• 2097152: 2 MB
• 4194304: 4 MB
• 8388608: 8 MB
• 16777216: 16 MB
• 33554432: 32 MB
•
-
2147483648: Maximum
volume-type string • standard: Standard volume.
• standard*: Destination of an in-progress volume copy and cannot be
mounted until the copy is complete.
• snap-pool: Snap-pool volume.
• master volume: Master volume.
• snapshot: Snapshot volume.
• replication source: Source for an in-progress replication to a
secondary volume.
volume-type-
numeric
uint32 Numeric equivalents for volume-type values.
• 0: standard
• 1: snap-pool
• 2: master volume
• 3: snapshot
• 4: standard*
• 8: replication source
Table 95 volumes properties (continued)
Name Type Description