User manual

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Write cache
Hard drive write cache is enabled or disabled. Default is
“Enabled”.
Standby
HDD auto spindown to save power. Default is “Disabled”.
Readahead
This feature makes data be loaded to disk’s buffer in
advance for further use. Default is “Enabled”.
Command
queuing
Newer SATA and most SCSI disks can queue multiple
commands and handle one by one. Default is “Enabled”.
•
PD operation description:
Set Free disk
Make the selected hard drive be free for use.
Set Global
spare
Set the selected hard drive to global spare of all RGs.
Set
Dedicated
spares
Set a hard drive to dedicated spare of the selected RG.
Disk Scrub
Scrub the hard drive.
Upgrade
Upgrade hard drive firmware.
Turn on/off
the indication
LED
Turn on the indication LED of the hard drive. Click again to
turn off.
More
information
Show hard drive detail information.
4.4.2 RAID group
“RAID group” can view the status of each RAID group. The following is an example
to create a RG.
Step 1: Click “Create”, enter “Name”, choose “RAID level”, click “Select PD” to
select PD. Then click “Next”. The “Write Cache” option is to enable or disable the
write cache option of hard drives. The “Standby” option is to enable or disable the
auto spindown function of hard drives, when this option is enabled and hard drives
have no I/O access after certain period of time, they will spin down automatically. The
“Readahead” option is to enable or disable the read ahead function. The
“Command queuing” option is to enable or disable the hard drives’ command
queue function.
RAG362