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RAID levels

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RAID levels

Technically, what is the difference between RAID 0/1 and RAID 1/0?
4 REPLIES
Vincent Farrugia
Honored Contributor

Re: RAID levels

Hello,

RAID 10 (or RAID 1/0) distributes data evenly across a number of disks, and mirrors eack disk to another disk. Basically it's normal disk striping, plus the stripes are mirrored to other disks.

In RAID 0/1, mirroring is done block-wise, not disk-base. So each block is written twice, on two consecutive disks. Thus, this allows any number of disks, not necessarily an even number, like RAID 10.

See attached.

HTH,
Vince
Tape Drives RULE!!!
Leif Halvarsson_2
Honored Contributor

Re: RAID levels

Hi
I don't think there is any difference. Sometimes it is called Raid 10, Raid 1+0 and perhaps other variants too. Technically it means striping + mirroring, two sets of disks is striped for performance and mirrored for security.
Leif Halvarsson_2
Honored Contributor

Re: RAID levels

Hi
Perhaps I am wrong but I can't find any official definitions for this. What I can find is that "Different implementation is possible" with Raid level 1+0. One example:
http://www.engin.umd.umich.edu/~yilu/ECE578/portella/raid/sld017.htm

But if this different implementations is called 1/0 0/1 or something other seems to be vendor specific.
Mike Fisher_1
Frequent Advisor
Solution

Re: RAID levels

Hi MAS

This will lead you to more than you'll ever want to know about RAID !

http://www.acnc.com/04_01_00.html

Regards Mike
Time flies like an arrow. Fruit flies prefer a banana.