User Manual

ManualsBrandsAccusys ManualsStorageExaRAID GUI

211

212

213

214

215

216

217

218

219

220

Advanced Functions

5-40

(6) Mount the LUN of the primary volume at the host computers

• Deleting Snapshots

It is advised to delete any snapshot volume once you do not need it.

Deleting a snapshot volume frees the space it occupies in the secondary

volume, and if there is no snapshot, the performance of the primary

volume will be back to normal. You can do it freely as long as no host is

accessing it, and deleting one snapshot does not interfere with the other

snapshots of the same source volume.

• Snapshot Roaming

The snapshot configurations are stored in the disks of the secondary

volume. If “Auto Array Roaming Control” option is enabled please see

2.7.16 Miscellaneous on page 2-56, foreign hard disks with snapshot

configurations can be automatically restored during the controller boo-

up. However, if “Auto Array Roaming Control” option is turned off or auto

array roaming does not work due to configuration conflict, configurations

of disk groups and logical disks have to be restored first by importing the

foreign hard disks, and then you may proceed to manually import the

snapshots by GUI or CLI please see 2.7.12 Array roaming on page 2-

52.After the snapshots are imported either automatically or manually, you

need to set their LUN mappings.

5.5 Dynamic Capacity Management

The RAID controller enables flexibility in capacity configuration and

reconfigurations for the following benefits:

• Improving the utilization of disk capacity

• Lowering the cost of hard disks in term of procurement and energy

• Easy management without down time

• Comprehensive capacity management utilities

The firmware utilities below allow you to increase disk space:

Note

1. 1.Restoring data with a snapshot volume destroys the data on the

primary volume.

2. If selecting a snapshot volume with LUN accessed by host

computer, flush the system cache before unmouting the LUN of

the snapshot volume.

Note

Abnormal shutdown of the RAID system could cause

data loss of the snapshot volume if the lookup table on

the secondary volume is not updated.