New Advanced RAID Level for Today's Larger Storage Capacities: Advanced Data Guarding

New Advanced RAID Level for Today's Larger Storage Capacities: 3
13JE-1000A-WWEN
What customers can expect from Compaq
RAID ADG solution
RAID ADG is a new advanced RAID level that increases the number of sets of parity, creating
multiple sets striped across the disks to provide unparalleled fault tolerance, greater than RAID 1
or RAID 5, and at a lower cost implementation than RAID 1. Designed for support on the Smart
Array 5300 Controller, RAID ADG is ideal for applications requiring large volumes. Available in
the 1
st
quarter of 2001, with the Smart Array 5300 Controller, RAID ADG can safely protect an
array up to 56 total drives, ensuring customers of a powerful solution with high fault tolerance.
Some customers’ needs now require a fault tolerance scheme that would provide higher reliability
than RAID 5 at a lower cost than RAID 1. Compaq recognized these customers’ needs for high
capacity RAID protection on a single storage array that could span a large number of disks.
Customers can now complete their server/storage solution with a Compaq innovation - Advanced
Data Guarding (RAID ADG) system.
RAID ADG Features and Benefits
✔ RAID ADG can tolerate multiple simultaneous drive failures without downtime or data
loss.
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✔ Ideal for applications requiring large logical drives
✔ Can safely protect an array up to 56 total drives
✔ Greater fault tolerance than RAID 1 or RAID 5
✔ Lower implementation cost than RAID 1
✔ Supports Online Spare Drive
✔ Supports Online RAID Level Migration from RAID 1 or RAID 5
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A RAID ADG Enabler Module must be attached to the controller to enable RAID ADG configuration via Array Configuration
Utility (ACU). The module is shipped with the 128MB cache board.