Chapter 3 Command Descriptions
43
clear cache
Description
Clears any unwritable cache in the RAID controllers for a specified volume, or any
orphaned data for volumes that no longer online or no longer exist. Orphaned data
can occur if there is a power loss during I/O, a drive is removed from a vdisk while
the power is off, or two or more drives in the same vdisk go down causing the vdisk
to go down. Unwritable data can only exist if write-back cache is enabled. If
writeback cache is disabled, then unwritable cache will never appear.
Input
Example
Clear the cache in both controllers for volume V1.
clear cache [volume
volume
]
Parameter
Description
volume
volume
Optional. Specifies the volume by its name or serial number. For
the syntax to use, see “Volume Syntax” on page 25. If this
parameter is omitted, the command clears any unneeded
orphaned data for volumes that are no longer online or no longer
exist.
#
clear cache volume Volume1
Success: Orphan cache data has been cleared
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