2006-09-16 06:49:58 · 4 answers · asked by Harshal M 3 in Computers & Internet ➔ Computer Networking
Protecting your data against the failure of a single disk.
RAID uses 2 or more disks (RAID 1 uses 2, RAID 5 uses 3-15 or more depending on the kind of disk technology) so that if one of the disks fails, the others keep running and you don't lose your data.
Have a look over Wikipedia's definition:
http://en.wikipedia.org/wiki/RAID
2006-09-16 06:51:24 · answer #1 · answered by lwcomputing 6 · 0⤊ 0⤋
Raid -1 is to mirror, e.g if you have 2 drives, they will have identical data (mirroring), so if 1 drive goes down, it automatically uses the other drive (no need to shut the system down).
Raid -5 is a bit of both worlds, it gives you performance by using all the drives at the same time (striping) but also provides a little redundancy, meaning if you say use 5 drives and suddenly 1 drive fails, the other 4 drives will have enough information to rebuild that 5 drive when you put a new one in!.
2006-09-16 13:54:24 · answer #2 · answered by Elmer Fudd 6 · 1⤊ 0⤋
RAID technology is usualy used on servers (web server, file server, email server etc) to create multiple backups of HDD image so that in case of HDD failure system can run uninterruptibily.
2006-09-18 02:12:21 · answer #3 · answered by BunX 3 · 0⤊ 0⤋
It is used for fault tolerance of data that is stored on ur system ,it prevent the loss of data from ur system .To know more on this please visit
"http://www.storagereview.com/guide2000/ref/hdd/perf/raid/index.html"
2006-09-16 14:01:53 · answer #4 · answered by csgnanam 2 · 1⤊ 0⤋