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I/O transfer rate (Bandwidth) = No. of drives x drive I/O transfer rate

/
No of I/O’s Per second =

Controller

Segment Segment
0
0

Disk controller arrangement for RAID Level 1

RAID Level 2, - Bit interleaving of Data: It contains arrays of multiple drives
connected-to a disk array controller.

Data (written one bit at a time) is bit interleaved across multiple drives. Multiple
check disks are used to detect and correct errors.

Parts Bits
Array Controller

A1 A2 A3 A4 A5 Pa
B1 B2 B3 B4 B5 Pb

Host adapter organization of bit interleaving for RAID level2 It provides the
ability to handle very large files, and a high level of integrity and reliability. It is
good for multimedia system. RAID Level 2 utilizes a hamming error correcting
code to correct single-bit errors and double bit errors.
Drawbacks:
(i) It requires multiple drives for error correction
(ii) (ii) It is an expensive approach to data redundancy.
(iii) It is slow.

Uses: It is used in multimedia system. Because we can store bulk of video and
audio data.