The target audience is a system administrator with knowledge of IP administration
and Storage Area Network (SAN) administration who will have the authority to
design the array configurations using the JMR Storage Manager software.
RAID Levels
Each RAID level provides a unique storage system solution ranging from fast
read/write, mirroring with 100 per cent redundancy, distributed parity, and layered
RAID configurations.
The following is a brief list of the RAID levels supported by JMR Storage
Manager controller.
RAID 0
Provides high I/O performance by striping (distributing) data across multiple
spindles; however, it does not provide fault tolerance.
RAID 1
Provides excellent fault tolerance through disk mirroring with improved read
performance and single spindle write performance, ideal for mission critical
database applications.
RAID 3
Provides high read performance, good write performance, and single spindle fault
tolerance for video applications.
RAID 5
Provides single drive failure protection with excellent read performance by
striping data and parity across multiple spindles, suitable for varied applications
requiring fault tolerance.
RAID 6
Provides double drive failure protection with excellent read performance by
striping data and dual parity across multiple spindles. Slightly less efficient
storage than RAID 5 and slightly slower write performance as two additional
parities must be written.
RAID 10
Provides striping of mirrors to improve read performance over RAID 1 and can
tolerate up to half of the spindles failing.
RAID 30
Improves RAID 3 read and write performance by striping multiple RAID 3 sets
and can selectively tolerate up to two spindle failures.
RAID 50
Improves RAID 5 read and write performance by striping multiple RAID 5 sets
and can selectively tolerate up to two spindle failures.
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16-Bay 4G FC-SATA300/SAS RAID Array Management Users Guide Rev B