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Ultera Systems, Inc. is the
leading manufacturer of RAID (Redundant Array of Independent Drives) , RAIT(Redundant
Array of Independent Tape Drives) and RAIL(Redundant Array of Independent Libraries)
hardware controller solutions designed for removable media data storage devices: |
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Tape |
Drives, Autoloaders,
Libraries |
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Optical |
Drives, Autoloaders,
Libraries |
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Ultera's fourth generation proprietary
hardware RAID ASIC design applies RAID Levels 0, 1, 3 and 10 to enhance performance,
capacity and data protection to a level that no single removable media data storage device
can provide. See the advantages of these RAID Levels below. |
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RAID LEVELS |
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Six different RAID Levels are defined by the University
of California, Berkeley to describe various levels of disk array architectures.
Although they are numbered from Level 0 to Level 5, successive numbers do not indicate
higher fault tolerance or higher performance, only different capabilities. |
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| OPTICAL
SOLUTIONS |
TAPE
SOLUTIONS |
Disk RAID Level 0
Striping
Data is "Striped" across multiple disks with no additional ECC codes or
redundancy. |
Tape
RAID Level 0
Striping
Provides high performance and capacity for tape applications.
Up to 4 times faster than a single tape drive! |
Disk RAID Level 1
Mirroring with Fault Tolerance
All data is redundantly recorded,
"Mirrored" to multiple disk drives. |
Tape
RAID Level 1
Mirroring with Fault Tolerance
Provides the ability to create multiple tape
backup copies in the same time it takes to create a single tape! |
Disk RAID Level 3
Striping with Parity Protection
Data is Striped byte-by-byte dividing the host block transfer size across
multiple disks, and a single additional disk is dedicated to recording parity data. |
Tape
RAID Level 3
Striping with Parity Protection
Provides high performance and capacity for tape applications
including data protection using a parity tape volume for long term data archiving! |
Disk RAID Level 10
Mirroring and Striping
(Combination of RAID Levels 1 & 0)
Data is Striped byte-by-byte dividing the host block transfer size across
multiple disks, and at the same time a Mirrored set of identical disks are created
simultaneously. |
Tape
RAID Level 10
Mirrored Striping
Provides high performance and capacity
for tape applications. Up to 2 times faster than a single tape drive plus a
duplicate set of media cartridges are produced for offsite storage. |
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The following RAID Levels are defined by the Berkeley
standard but, they do not directly apply or they have design limits when applied to
removable media data storage devices in handling variable block sizes and achieving the
highest performance and maximum device parallelism as described above. |
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Disk RAID Level 2
Data is Striped across multiple disks, and error
checking and correcting (ECC) codes are written onto additional disks for use in
fault-recovery. |
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Disk RAID Level 4
Data is Striped block-by-block across multiple disks,
and a single additional disk is dedicated to recording parity data. |
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Disk RAID Level 5
Data is Striped block-by-block across multiple disks,
and parity data is also spread out over multiple disks. |
