INTRODUCTION
chips, which can simultaneously communicate with the I/O proces- sor and read or write data on multiple drives.
Unsurpassed Data Availability
As storage capacity requirements continue to rapidly increase, us- ers require greater levels of disk drive fault tolerance, which can be implemented without doubling the investment in disk drives. RAID 1 (mirroring) provides high fault tolerance. However, half of the drive capacity of the array is lost to mirroring, making it too costly for most users to implement on large volume sets due to dobuling the number of drives required. Users want the protection of RAID 1 or better with an implementation cost comparable to RAID 5. RAID 6 can offer fault tolerance greater than RAID 1 or RAID 5 but only consumes the capacity of 2 disk drives for distributed parity data. The
The SATA RAID controllers also provide RAID levels 0, 1, 1E, 3, 5 or JBOD configurations. Its high data availability and protection is derived from the following capabilities: Online RAID Capacity Ex- pansion, Array Roaming, Online RAID Level / Stripe Size Migration, Dynamic Volume Set Expansion, Global Online Spare, Automatic Drive Failure Detection, Automatic Failed Drive Rebuilding, Disk
Easy RAID Management
The SATA RAID controller utilizes
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