Avago Technologies 3ware SAS 9750-4i - Manual (Page 67)

Controller Object Commands
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to set nocache or nowrcache unless there is a BBU (battery backup unit) or
UPS (uninterruptible power supply) installed.
nordcache attribute instructs CLI to disable the read cache on the newly
created unit. Enabling the read cache increases performance. The
rdcachebasic attribute instructs CLI to set the read cache mode on the newly
created unit to Basic. By default (if you do not set a read cache attribute), the
read cache mode is set to Intelligent. This command is supported on 9650SE
and later controllers. For more information, see “/cx/ux set
rdcache=basic|intelligent|off” on page 92.
autoverify attribute enables the autoverify attribute on the unit that is to be
created. For more details on this feature, see “/cx/ux set autoverify=on|off” on
page 90. This feature is not supported on model 7000/8000. For 9750,
9690SA, and 9650SE controllers that support basic verify, autoverify will be
set to ON by default for a new unit. For other 9000-series controllers that do
not support basic verify, autoverify is set to OFF by default for a new unit.
noqpolicy attribute instructs CLI to disable the qpolicy (drive queuing for
SATA drives only) on the newly created unit. The default is for the qpolicy to
be on (in other words, noqpolicy is not specified). For a spare unit, drive
queuing is not meaningful, so the noqpolicy cannot be set. During unit
creation, specifying noqpolicy for a spare returns an error. (If the spare unit
becomes a true unit, it will adopt the qpolicy of the “new” unit.) For more
about drive queuing, see “/cx/ux show qpolicy” on page 84 and “/cx/ux set
qpolicy=on|off” on page 94.
ignoreECC attribute enables the ignoreECC/OverwriteECC attribute on the
unit that is to be created. For more details on this feature, see “/cx/ux set
ignoreECC=on|off” on page 94. The following table illustrates the supported
Model-Unit Types. This table only applies to setting this feature at unit
creation time. IgnoreECC only applies to redundant units.
For the 7/8000
series, this setting is only applicable during rebuild; it is not applicable
during creation.
Table 8: Supported Model-Unit Types for ignoreECC
Model R-0 R-1 R-5 R-6 R-10 R-50 Single Spare
7K/8K No No No N/A No No No No
9000 a
a. Models 9500S, 9550SX, and 9590SE
No Yes Yes N/A Yes Yes No No
9750,
9690SA,
and
9650SE No Yes Yes Yes Yes Yes No No