RAID 0 +1

hi,

We have got about 10 drives(disks) and want to have the raid mechanism. People are talking of RAID 0 +1....,
but what is RAID 0 + 1, and when do you use.

Badrinath

RAID 0+1 is mirroring and striping of dbf
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Consider RAID 0+1 to be a blend of the following:
RAID-0. This technique has striping but no redundancy of data. It offers the best performance but no fault-tolerance.
RAID-1. This type is also known as disk mirroring and consists of at least two drives that duplicate the storage of data. There is no striping. Read performance is improved since either disk can be read at the same time. Write performance is the same as for single disk storage. RAID-1 provides the best performance and the best fault-tolerance in a multi-user system.


[Edited by Halo on 04-03-2001 at 03:10 PM]

RAID 0 + 1 means Disk mirroring and Striping. Mirroring is redundancy which will be useful in case there is a Disk controller failure. But if there is data corruption then the corrupted data will be there in both set of disks. Disk striping will be very useful if it is OLTP database.

Raid Advisory Board (RAB):

http://www.raid-advisory.com/

0 is striping
1 is mirroring

http://www.acnc.com/04_00.html

You have explanation from raid 0 to 10

Excellent link pando!