Product manual

VTrak M-Class Product Manual
134
10. From the Read Policy dropdown menu, select a Read Cache policy for this
logical drive.
The choices are Read Cache, Read Ahead and No (read) Cache. Read
Ahead is the default. See “Cache Policy” on page 245.
11. From the Write Policy dropdown menu, select a Write Cache policy for this
logical drive.
The choices are Write Through (thru) and Write Back. Write Back is the
default. If you selected No Cache under Read Cache, this setting will be
Write Through. See “Cache Policy” on page 245.
12. Click the Update button to enter the logical drive parameters.
13. Review the results. If there is remaining space on the disk array, you can
create another logical drive, following the steps above. Each logical drive
can have a different set of parameters.
14. Click the Next button when you are done.
A new window displays with the disk array information and the proposed
logical drives with their parameters.
15. Click the Submit button create the logical drives.
The new logical drive appears in the Logical Drive List on the Information tab.
If you created a fault-tolerant logical drive (any RAID level except RAID 0), the
Operational Status of new logical drive will display Synchronizing for several
minutes after creation. You can use the logical drive during this period but read/
write performance could be slower than normal. See “Logical Drive
Synchronization” on page 143.
Delete a Logical Drive
The Disk Array–Delete LD tab enables you to delete a logical drive under this
disk array.
To delete a logical drive:
1. Click the Subsystem icon in Tree View.
2. Click on the Disk Arrays icon.
3. Click on the Disk Array icon.
4. Click on the Delete LD tab in Management View.
5. Check the box to the left of the logical drive you want to delete.
Caution
All data on the logical drive will be lost. Back up any valuable data
before deleting the logical drive.