How does RAID 5 Work?

Custom / CUSTOM
October 21, 2009 at 19:57:10
Specs: Microsoft Windows XP Professional, 2.802 GHz / 3007 MB
If you are using 3 Drives, Will you need a 1 TB Hard Drive and 2 500 GB Hard Drives?

If you are using 4 hard drives, will you need it to be all 500 GB, so that one set is configured as RAID 1 and another set as RAID 0?

In the end, you will have a stable 1 TB Storage Space.

Is that how RAID 5 Works?

See More: How does RAID 5 Work?

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October 22, 2009 at 05:33:55
You'd better do some reading. And pay attention to the performance issues with RAID 5.

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October 22, 2009 at 06:26:49
I asked if someone can expain weather I am correct or not, not if anyone can give me a link which doesn't answer my question. What hard drives does it take? Will I need 4 hard drives to be identical?

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October 22, 2009 at 13:38:50
In a RAID 5 config, all HDD's should be of same size and type, if they're not, the array will be based on the size of the smallest HDD. For instance, if you have 3 HDD's - 250GB, 500GB & 1TB - all drives would be seen as 250GB so the total useable capacity would be 500GB...the other 250GB is used for parity data. This is all explained in the 1st link in my other response had you bothered to take the time to read it.

Here's a couple more articles you should take the time to read (but probably won't):

RAID 5 May Be Doomed in 2009

RAIDfail: Don't use RAID 5 on small arrays

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