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3–2 Creating Storagesets
Introduction
Storagesets are implementations of RAID technology, also known as a Redundant
Array of Independent Disks. Every storageset shares one important feature: each one
looks like a single storage unit to the host, regardless of the number of drives it uses.
You can create storage units by combining disk drives into storagesets, such as
stripesets, RAIDsets, and mirrorsets, or by presenting them to the host as single-disk
units, as shown in Figure 3–1.
■ Stripesets (RAID 0) combine disk drives in serial to increase transfer or request
rates.
■ Mirrorsets (RAID 1) combine disk drives in parallel to provide a highly-reliable
storage unit.
■ RAIDsets (RAID 3/5) combine disk drives in serial—as do stripesets—but also
store parity data to ensure high reliability.
■ Striped mirrorsets (RAID 0+1) combine mirrorsets in serial and parallel to
provide the highest throughput and availability of any storage unit.
Controllers can support the number of RAIDsets as listed in Table 3–1.
For a complete discussion of RAID, refer to The RAIDBOOK—A Source Book for
Disk Array Technology.