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Qsan Document – User Manual
Enabled: When the write cache is enabled, data transfer operations are written
to fast cache memory instead of being written directly to disk. This may improve
performance but may take the data lost risk when losing power if there is no
BBM protection.
Disabled: Disable disk write cache. (Default)
。
Standby:
Disabled: Disable auto spin down. (Default)
30 sec / 1 min / 5 min / 30 min: The hard drives will be spun down for power
saving when the disk is idle for the period of time specified.
。
Read-Ahead:
Enabled: The system will discern what data will be needed next based on what
was just retrieved from disk and then preload this data into the disks buffer. This
feature will improve performance when the data being retrieved is sequential.
(Default)
Disabled: Disable disk read ahead.
。
Command Queuing:
Enabled: Sends multiple commands at once to a disk to improve performance.
(Default)
Disabled: Disable disk command queuing.
▼
->
Add RAID Set
: Add RAID sets for the thin provisioning RAID group.
▼
->
Add Policy
:Add policy for the thin provisioning RAID group..
▼
->
More information
: Dispkay RAID group detail information.
Select the thin provisioning RAID group, it displays on the following. There are two more tables to
describe the properties of the thin provisioning RAID group, RAID Set and RAID Group Policy.
