User`s guide

Chapter 2. RAID Array Controller
EK–SMCPO–UG. A01 2–11
2.6.1 RAID 0
RAID 0 breaks up data into smaller chunks and writes each chunk to a different
drive in the array. The size of each chunk is determined by the controller’s chunk
size parameter, which you set in the course of creating a RAID set.
The advantage of RAID 0 is its high bandwidth. By breaking up a large block of
data into smaller chunks, the controller can use multiple drive channels to write
the chunks to the disk drives. Furthermore, RAID 0 involves no parity calcula-
tions to complicate the write operation. Likewise, a RAID 0 read operation em-
ploys multiple drives to assemble a single, large data block. This makes RAID 0
ideal for applications such as graphics, video, and imaging that involve the writ-
ing and reading of large, sequential blocks. Figure 2–4 shows a diagram of a
RAID 0 write.
CAUTION
The lack of parity means that a RAID 0-disk array
offers absolutely no redundancy and thus cannot
recover from a drive failure.