Controller Settings page
www.3ware.com
199
Continue on Source Error During Rebuild.
This policy applies only to units
which are redundant. (For units which are not redundant, a check box is not
available.) When this policy is set, ECC errors are ignored when they are
encountered during a rebuild. When this policy is not set, a rebuild will abort
upon encountering an ECC error and the unit will be set back to Degraded.
Since this option could result in the loss of some source data in the event of
source errors, select this option only if you want to ensure that a rebuild will
complete successfully without manual intervention. If the rebuild fails and
Continue on Source Error During Rebuild
is not selected, then you have the
option to start a rebuild manually. It is recommended that you execute a file
system check when the rebuild completes. Under Windows, you can do this
by right-clicking on the Drive and choosing Properties; then on the Tools tab,
click Check Now.
Queuing.
This policy enables or disables Native Command Queuing (NCQ)
for drives in the unit. By default, queuing is disabled. You can enable it, if
desired.
NCQ only operates when the feature is enabled at both the drive and the
controller. If a drive does not support NCQ, the policy setting for the
controller is ignored.
Enabling NCQ can improve performance in many applications; it causes
command reordering to be done on the drive itself.
StorSave Profile.
The StorSave feature includes an option that lets you
change the StorSave Profile used for a unit. Three profiles are available:
Protection, Balanced, and Performance. These profiles automatically adjust
several different factors that affect protection and performance, including
whether FUA (Forced Unit Access) is honored, whether Write Journaling is
enabled, and whether Disable Cache on Degrade is enabled. For additional
information, see “Setting the StorSave Profile for a Unit” on page 117.
Note:
The policy
Continue on Source Error During Rebuild
is equivalent to the
“Force continue on source errors” option in 3DM v 1.x and the “ignoreEcc” option in
the CLI.
Note:
If the write cache setting is disabled for a unit, the StorSave Profile capability
does not apply and is automatically disabled.
