Installation guide

Software Operation Manual
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4.8.1.12 Auto Activate Incomplete Raid
When some of the disk drives are removed in power off state or boot up stage, the
RAID set state will change to “Incomplete State”. But if a user wants to automatically
continue to work while the SAS RAID controller is powered on, the user can set the
“Auto Activate Incomplete Raid” option to enable. The RAID state will change to
“Degraded Mode” while it powers on.
4.8.1.13 Disk Write Cache Mode
Disk cache can be turned off to prevent data lost, turned on to increase the
performance of the machine. The following is the reason why a user might want to
turn off the cache. In case of power failure, the data stored in the disk cache waiting
to be process might be lost. The disadvantage to turn off the disk cache is that
performance will decrease dramatically.
Auto: Disk cache's setting will accord the installation of battery backup. When battery
backup is installed, Disk cache is disabled. No battery backup installed, Disk cache is
enabled.
A user can set the “Disk Write Cache Mode”: "Auto", "Enabled", or "Disabled".
4.8.1.14 Write Same For Initialization
Drives that support the Write Same feature (SCT) can write to multiple drive sectors
at once, improving initialization time. To take advantage of this feature, all the drives
in the unit must support Write Same. User can set the “SAS And SATA”, “SAS Only”,
“SATA Only” or “Disabled” for the controller initialization.
4.8.1.15 Hot Plugged Disk For Rebuilding
It defines if the RAID volume should start rebuilding or not when controller detects a
disk is inserted/re-inserted during online. The options are: “Blank Disk Only”,
“Always”, and “Disable”. The default is “Blank Disk Only”.
Blank Disk Only: it will trigger the rebuilding if and only if the inserted disk has not
been in the RAID array before, which has no RAID signature on it. When a previously
removed disk is self re-inserted, it won’t trigger the degraded RAID array to rebuild,
and the administrator has a chance to identify this misbehaving disk and replaces it.
Always: whenever a disk is inserted/re-inserted whether new or previously existed, it
always trigger a rebuilding for the Degraded RAID set/Volume.
Disable: it will not trigger rebuilding regardless what sort of disk plugging in. When
“Disable” and/or “Blank Disk Only” is selected, the re-inserted/previously removed
disk will be identified as a disk in a separate RAID set with duplicated RAID set# and
with all the rest of RAID members missing.
4.8.1.16 PCIe Gen3
The “Disabled” option is used to force PCIe running Gen2 mode for compatible issue