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Galaxy Web GUI User Reference Manual

5-20 Drive-side Parameters

This feature facilitates the support for both Tagged

Command Queuing (TCQ) and Native Command Queuing

(NCQ). ICQ is a traditional feature on SCSI and Fibre disk

drives, while NCQ is recently implemented with SATA disk

drives. The queuing feature requires the support of both host

adapters and hard disk drives. Command queuing can

intelligently reorder host requests to streamline random

accesses for IOPS/multi-user environments.

The default setting is “Enabled” with a maximum tag

count of 32 (SCSI/Fibre drives) or 4 (for SATA/SAS

drives).

CAUTION!

Disabling Tag Command Queuing will disable the hard

drives’ built-in buffer. Although Command Queuing can boost

performance, however, data cached in drives’ buffer will be

affected if power outage occurs.

4. Periodic Drive Check Time(sec):

The “Periodic Drive Check Time” is the time interval for the

controller to check all disk drives that were on the drive bus

at controller startup (a list of all the drives that were detected

can be seen under “View and Edit Drives”).

5. Periodic SAF-TE and SES Device Check Time(sec):

If there are remote components in your RAID enclosure

being controlled via SAF-TE/S.E.S. devices, use this function

to select how often the controller will check the status of

these devices.

6. Periodic Auto-Detect Failure Drive Swap Check Time(sec):

The controller scans drive buses at this interval to check if a

failed drive has been replaced. If a failed drive is replaced,

the controller will proceed with the rebuild process.

IMPORTANT!

 The "Periodic Drive Check Time” is enabled by choosing a timeout value.

(Default is one second) The RAID controller will poll all connected drives

through the controller’s drive channels at the assigned interval. Drive

removal will be detected even if a host does not attempt to access data

on that specific drive.

 If the "Periodic Drive Check Time" is set to "Disabled", the controller will

not be able to detect any drive removal that occurs after the controller

initialization process. The controller will only be able to detect drive

removal when a host attempts to access data on that drive.

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