Chapter 2: Using the Command Line Utility
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Parameters
Controller# is the controller number.
LogicalDrive# is the number of the logical drive. You can specify one or more logical drives.
Channel# is the channel number for the SSD.
Device# is the device number for the SSD.
Read#/Write# is the read/write ratio for invalidating data on the SSD. When the ratio is
reached, the page is removed from the cache. Values range from 1-10 for each parameter.
FlushAndFetchRate# is the read cache fetch rate from 1 to 1000: 1-50=Low, 51-100=Medium,
101-1000=High. The default is 100.
Note:
The lower the rate the longer the page is kept on the SSD before it is flushed from the
cache.
dirtyPageThreshold# controls the amount cache space allocated to “dirty” data; that is, data
that has not been committed to disk. The threshold value ranges from 1-100 (percent). Once
the percentage of dirty pages crosses the threshold, the data are flushed to disk.
Policy is the maxCache write cache policy:
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WB - write back enabled. maxCache will store the data on the SSD and write it back to the
hard disks when there is little or no impact on performance. This is the default policy.
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INSTWB - instant write back enabled. In addition to the default policy, maxCache will
create dirty pages on-the-fly for full-stripe writes if there is room on the SSD and the
number of dirty pages is below the threshold.
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WT - write through enabled. Similar to instant write back, but full-stripe writes go to both
the cache and hard disk and no dirty pages are created on-the-fly.
Clear clears the maxCache pool.
Examples
ARCCONF SETMAXCACHE 1 LOGICALDRIVE 1 READCACHE ENABLE
ARCCONF SETMAXCACHE 1 LOGICALDRIVE 1 WRITECACHE ENABLE WRITEPOLICY WT
ARCCONF SETMAXCACHE 1 DIRTYPAGETHRESHOLD 50
ARCCONF SETMAXCACHE 1 ADDTOPOOL 0 1
ARCCONF SETMAXCACHE 1 REMOVEFROMPOOL 0 1 0 2
ARCCONF SETMAXCACHE 1 RWBALANCE 4 1
ARCCONF SETMAXCACHE 1 FLUSHANDFETCHRATE 200
ARCCONF SETMAXCACHE 1 CLEAR
arcconf setname
Renames a logical drive.
Syntax
ARCCONF SETNAME <Controller#> LOGICALDRIVE <LogicalDrive#> <New Name>
Parameters
Controller# is the controller number
