User Manual

Using the RAID GUI
2-25
To clear write buffers in the write cache of a JBOD disk, select a JBOD and
click the Flush button.
• Create JBOD volume pair
Instead of creating volume pairs in the Snapshot Volumes page, you can
directly create volume pair to a specified JBOD disk by clicking the S.VOL
button. Specify a virtual disk as the secondary volume from the SV ID
drop-down menu, then click the Apply button to confirm.
• Detailed JBOD disk information
Click to display a complete list of JBOD disk information. You will see
the following details.
Write Sorting This option enables or disables the sorting in the
write cache. To improve writing performance, it is
recommended to turn this option on for random
access. This option is available only if the write
cache is on.
Read Ahead
Policy
Always: The controller performs pre-fetching data
for every read command from hosts.
Adaptive: The controller performs pre-fetching
only for host read commands that are detected
as sequential reads. The detection is done by read
logs.
Off: If there is no sequential read command, read-
ahead will result in overhead, and you can disable
the read-ahead.
Read Ahead
Multiplier
This option specifies the read ahead multiplier for
the Always and Adaptive read ahead policies.
Select how much additional sequential data will
be pre-fetched. The default value is 8.
Read Logs This option specifies the number of read logs for
the Adaptive read ahead policy. The range is
between 1 and 128. The default value is 32.
• JBOD ID
• UUID
• Created Time and Date
• Write Cache Status
• Write Cache Setting
• Write Sorting
• Read Ahead Policy
• Read Ahead Multiplier
• Read Logs