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Embedded SATA Software RAID 2-1
Copyright © 2004 by LSI Logic Corporation. All rights reserved.
Chapter 2
RAID Levels
Embedded SATA Software RAID supports RAID levels 0, 1, and 10. These
RAID levels are discussed in the following sections:
• Section 2.1, “RAID 0,” page 2-1
• Section 2.2, “RAID 1,” page 2-2
• Section 2.3, “RAID 10,” page 2-3
2.1 RAID 0
RAID 0 (Figure 2.1) provides disk striping across all configured drives in the
RAID subsystem. RAID 0 does not provide any data redundancy, but does offer
the best performance of any RAID level. RAID 0 breaks up data into smaller
segments, then stripes the data segments across each drive in the array as shown
in Figure 2.1. The size of each data segment is determined by the stripe size
parameter, which is set during the creation of the RAID set.
By breaking up a large file into smaller segments, Embedded SATA Software
RAID can use both IDE ports and drives to read or write the file faster. This
makes RAID 0 ideal for applications that require high bandwidth but do not
require fault tolerance.
Uses Provides high data throughput, especially for large files. Any
environment that does not require fault tolerance.
Strong Points Provides increased data throughput for large files. No capacity loss
penalty for parity.
Weak Points Does not provide fault tolerance. All data lost if any drive fails.
Drives One to two