Dell PowerVault MD3260i - Manual (Page 334)

Populate Actions
(Host Reads) -
Blocks Number of blocks in Populate Actions (Host Reads).
Populate Actions
(Host Writes) Number of host writes where data was copied from the base virtual disk to the SSD cache.
The Populate Actions (Host Writes) count may be zero for the cache configuration settings that
do not fill the cache as a result of a Write I/O operation.
Populate Actions
(Host Writes) -
Blocks Number of blocks in Populate Actions (Host Writes).
Invalidate
Actions Number of times data was invalidated/removed from the SSD cache. A cache invalidate
operation is performed for every host write request, every host read request with Forced Unit
Access (FUA), every verify request, and in some other circumstances.
Recycle Actions Number of times that the SSD cache block has been reused for another base virtual disk
and/or a different LBA range.
For effective cache operation, it is important that the number of recycles is small compared to
the combined number of read and write operations. If the number of Recycle Actions is close
to the combined number of Reads and Writes, then the SSD cache is thrashing. Either the
cache capacity needs to be increased or the workload is not favorable for use with SSD cache.
Available Bytes Number of bytes available in the SSD cache for use by this RAID controller module.
The available bytes, allocated bytes, and user data bytes are used to compute the Cache
Allocation % and the Cache Utilization %.
Allocated Bytes Number of bytes allocated from the SSD cache by this RAID controller module. Bytes allocated
from the SSD cache may be empty or they may contain data from base virtual disks.
The available bytes, allocated bytes, and user data bytes are used to compute the Cache
Allocation % and the Cache Utilization %.
User Data Bytes Number of allocated bytes in the SSD cache that contain data from base virtual disks.
The available bytes, allocated bytes, and user data bytes are used to compute the Cache
Allocation % and the Cache Utilization %.
Show Storage Array
Description
This command returns configuration information about the storage array. The parameters return lists of values for the
components and features in the storage array. You can enter the command with a single parameter or more than one
parameter. If you enter the command with no parameters, the entire storage array profile is displayed (which is the
same information as if you entered the profile parameter).
Syntax
show storageArray (autoSupportConfig | profile | batteryAge
| connections | defaultHostType | healthStatus | hostTypeTable |
hotSpareCoverage | features | time | virtualDiskDistribution
longRunningOperations
| summary)
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