HP P2000 G3 MSA System CLI Reference Guide 197
show cache-parameters
Description
Shows cache settings and status for the system and optionally for a volume.
Syntax
show cache-parameters [
volume
]
Parameters
volume
Optional. Name or serial number of the volume to show settings for. For volume syntax, see
Command syntax
on page 22. If this parameter is not specified, only system-wide settings are
shown.
Output System/controller cache parameters:
Operation Mode
Shows the system’s operating mode, also called the cache redundancy mode:
•
Active-Active ULP
: Both controllers are active using ULP (Unified LUN Presentation). Data
for volumes configured to use write-back cache is automatically mirrored between the two
controllers to provide fault tolerance.
•
Single Controller
: There is only a single controller in the enclosure.
•
Fail Over
: Operation has failed over to one controller because its partner is not operational.
The system has lost redundancy.
•
Down
: Both controllers are not operational.
Write Back Status
Shows the current, system-wide cache policy as determined by auto-write-through (AWT) logic. This
value is not settable by users. If an AWT trigger condition (such as a CompactFlash failure) is met,
the cache policy for all volumes changes to write-through, overriding the volume-specific settings.
When the problem is corrected, the cache policy reverts to the value configured for each individual
volume.
•
Enabled
: Write-back. This is the normal state.
•
Disabled
: Write-through.
•
Not up
: The controller is not up.
CompactFlash Status
•
Not Installed
: The CompactFlash card is not installed.
•
Installed
: The CompactFlash card is installed.
•
Unknown
: The CompactFlash card's status is unknown.
Cache Flush
•
Enabled
: If the controller loses power, it will automatically write cache data to the
CompactFlash card. Cache flush is normally enabled, but is temporarily disabled during
controller shut down.
•
Disabled
: Cache flush is disabled.
Volume cache parameters:
Serial Number
If a volume is specified, its serial number.
Name
If a volume is specified, its name.
Summary of Contents for P2000 G3
Page 1: ...HP P2000 G3 MSA System CLI Reference Guide Part number 500912 009 First edition February 2014 ...
Page 14: ...14 About this guide ...
Page 30: ...30 Categorical list of commands ...
Page 199: ...HP P2000 G3 MSA System CLI Reference Guide 199 See also set cache parameters show volumes ...
Page 294: ...294 Alphabetical list of commands See also set volume set vdisk ...
Page 498: ...498 XML API basetype properties PROPERTY name mrc version type uint8 0 PROPERTY OBJECT ...
Page 524: ...524 Glossary ...
Page 532: ...532 Index ...