Advanced Computer and Network Corporation
Strategic and Innovative RAID Solutions
Home

Company
Products
Solutions
RAID.edu
Service and Support
News
Contact
RAID.edu
JetStor III


RAID Level:
0
1
2
3
4
[ 5 ]
6
7
10
53
0+1
next




RAID 5: Independent Data disks with distributed parity blocks


Each entire data block is written on a data disk; parity for blocks in the same rank is generated on Writes, recorded in a distributed location and checked on Reads.

RAID Level 5 requires a minimum of 3 drives to implement





Characteristics/Advantages

Highest Read data transaction rate

Medium Write data transaction rate

Low ratio of ECC (Parity) disks to data disks means high efficiency

Good aggregate transfer rate

Back To Top





Disadvantages

Disk failure has a medium impact on throughput

Most complex controller design

Difficult to rebuild in the event of a disk failure (as compared to RAID level 1)

Individual block data transfer rate same as single disk

Recommended Applications

  • File and Application servers
  • Database servers
  • WWW, E-mail, and News servers
  • Intranet servers
  • Most versatile RAID level





Copyright 2000 - 2003 Advanced Computer & Network Corporation. All Rights Reserved.