User manual

Chapter 6: Technology
105
Expansion takes place on an existing Functional logical drive without disturbing
the existing data. While the logical drive is expanding, you can access the data as
before. When expasion is complete, your logical drive will have a larger capacity.
RAID Level Migration
To migrate a logical drive is to change its RAID level. The FastTrak TX4310 RAID
controller card supports RAID Level Migration. You must use the WebPAM
software to access this function.
See “Logical Drive Migration and Expansion” on page 75.
Migration takes place on an existing Functional logical drive without disturbing
the existing data. While the logical drive is migrating, you can access the data as
before. When migration is complete, your logical drive will have a different RAID
level and/or a larger capacity.
Different types of logical drives use different organizational models and have
varying benefits. The following outline breaks down the properties for each type
of RAID supported by FastTrak TX4310.
Level
Current Number
of Drives
Possible Number
of Drives
RAID 5 3 4
RAID 0 3 4
23 or 4
1 2, 3 or 4
From To
Increase
Add
Redundancy
Capacity Performance
RAID 10 RAID 5 •
RAID 1 RAID 10 • •
RAID 5 • •
RAID 0 RAID 10 • • •
RAID 5 • • •
RAID 1 •