Does the RAID deliver any fault tolerance with Striped Disk Array…

Asked By Ajeet Verma 0 points N/A Posted on - 09/28/2011

Redundant Array of Independent Disks short name is RAID.

We know RAID disk drive is used frequently on servers, but it is not important or necessary for personal computers.

Can anyone tell me Dose the RAID delivers any fault tolerance with Striped Disk Array?

Thank You.

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Answered By Patrick b 0 points N/A #81135

Does the RAID deliver any fault tolerance with Striped Disk Array…

Hello Ajeet Verma.

The striped disk array (proper term is striped set or striped volume) or what is more commonly referred to as RAID 0 splits data evenly across several disks (2 or more). It does not have parity information and does not provide data redundancy. RAID 0 is usually used to accomplish the following:

 

1. Increase performance.

 

2. Create larger logical disks from several small physical disks.

 

As for your question on whether it has fault tolerance, the answer is no. RAID 0 does not store parity information for data redundancy. Furthermore, because the data is spread out among several disks, if one of the disks fail, you end up with corrupted or incomplete data. The reliability is inversely proportional to the number of disks comprising the RAID meaning 2 disks is less reliable than using only 1 disk (3 disks is less reliable than 2 disks and so on).

 

If you want fault tolerance, you could go for RAID 1 (mirror).

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• Posted on - 09/29/2011
• Question Category: Storage Technology