RAID 1E

Advantages

Disadvantages

 

 

Implemented as a mirrored disk array

Very high disk overhead - uses only

whose segments are RAID 0 disk

50% of total capacity

arrays

 

High I/O rates are achieved thanks to

 

multiple stripe segments

 

Can use an odd number of disks

 

 

 

Recommended Applications for RAID 1E

Imaging applications

Database servers

General fileserver

RAID 5

Advantages

 

Disadvantages

 

 

High Read data transaction rate

Disk failure has a medium impact on

Medium Write data transaction rate

throughput

 

 

Good aggregate transfer rate

 

 

 

 

 

Recommended Applications for RAID 5

 

 

• File and Application servers

Intranet servers

• WWW, E-mail, and News servers

Most versatile RAID level

RAID 6

Advantages

Disadvantages

 

 

High Read data transaction rate

High disk overhead – equivalent of two

Medium Write data transaction rate

drives used for parity

 

Good aggregate transfer rate

Slightly lower performance than RAID 5

 

Safest RAID level, except for RAID 60

 

 

 

Recommended Applications for RAID 6

 

Accounting and Financial

Database servers

Any application requiring very high availability

SECURSTOR ASTRA ES

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Meridian Data manual RAID 1E