Table of Contents
Advertisement
Preferred Controller
The preferred controller of the RAID group. The default is controller 1.
(This option is only
visible when dual
controllers are
installed.)
The options are available on this tab:
Create: Create a RAID group.
The options are available after creating a RAID group:
▼ -> Migrate RAID Level: Change the RAID level of a RAID group. Please refer to next chapter for
details.
▼ -> Move RAID Level: Move the member disks of RAID group to totally different physical disks.
▼ -> Activate/Deactivate: Activate or deactivate the RAID group after disk roaming. Activate can be
executed when the RAID group status is offline. Conversely, Deactivate can be executed when the
status is online. These are for online disk roaming purpose.
▼ -> Verify Parity: Regenerate parity for the RAID group. It supports the RAID level 3 / 5 / 6 / 30 / 50 /
60.
▼ -> Delete: Delete the RAID group.
▼ -> Change Preferred Controller: Set the RAID group ownership to the other controller.
▼ -> Change RAID Options: Change the RAID property options.
。
Write Cache:
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: Display 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.
44
Advertisement
Table of Contents
