User`s guide

Chapter 3: About Your RAID Controller ● 20
Adding Enhanced Features
As your storage needs change, you can enhance data protection and
improve performance by upgrading your Adaptec controller with extra
features.
Adaptec offers a package of upgrade features that can be activated with
a feature key, which is sold separately. Purchase a feature key to unlock
these features:
● Copyback—You can use this feature to move data from a hot spare
back to its original location after a disk drive failure.
● Snapshots—You can use this feature to back up your data to tape,
clone a disk drive, or copy the data to multiple servers.
● RAID 1E—A RAID 1 Enhanced array is similar to a RAID 1 array
except that data is both mirrored and striped, and more disk drives
can be included.
● RAID 5EE—A RAID 5EE array is similar to a RAID 5 array except
that it includes a distributed spare and must be built from a
minimum of four disk drives.
● RAID 6—A RAID 6 array is similar to a RAID 5 array except that it
includes two independent sets of parity data instead of one.
● RAID 60
1
—A RAID 60 array is similar to a RAID 50 array except
that it includes four independent sets of parity data instead of two.
For more information about RAID levels, see Understanding RAID on
page 79.
To purchase a feature key, contact your Adaptec Reseller or refer to the
Adaptec Web site at
www.adaptec.com . To unlock the enhanced features
with a feature key, see page 21.
1
The Adaptec 2420SA RAID controller does not support RAID 60.