RAID disk monitoring

[Gipo_dinamia]

RAID is short for Redundant Array of Independent Disks and used to mirror data on two disk drives simultaneously to ensure data integrity. Disk mirroring protects from loss of data by instantly switching to the other disk with no interruption in service if one of the disk drives fail without requiring data restoration from a backup.
As I see Raid is a kind of backup and Ahosting.biz (http://www.ahosting.biz/serverspec/index.html) provides it on their servers. I know that there are different RAID and tell me, guys, what does the type of the RAID depends on? Which one is the best?

[serverorigin]

The fact they are using RAID is good but your question is hard to answer :)

RAID serves many purposes... 2 of the most looked at are Performance and recoverability.

RAID 1 is one of the most fault tolerant yet slow configurations. The data is completely mirrored to another disk. They mention doing RAID 10 or RAID 1+0 which is essentially mirroring and striping which uses 4 disks but less fault tolerant.

If I was to say the best configuration...It is only opinion... We use 2 RAID-0 sets and then combine the RAID-0 sets into a RAID-1 set. This configuration provides us the speed of RAID-0 with the redundancy of RAID 1. Typically it is more expensive and can be a bit more of a pain to configure but it seems to work well from our experience.

If you are looking for a host using RAID configuration...Any will do. Just have backups -- never depend on the host to safeguard your data from loss, it is the most common mistake customers make. Hosting companies will do their best but a hard-copy backup is always the best way to go.


May check out this link: Excellent resource for understanding the different RAID configurations. (http://www.lascon.co.uk/d008005.htm)

[Decker]

There's plenty of info on the web about RAID, basics 0 is just disks added together, 1 is simple mirroring of the disks (2 disks 2 copies of everything), 5 stripe sets (3 disks minimum + 1 for a parity set - not
RAID 1+0 which is essentially mirroring and striping which uses 4 disks
Then it goes up in steps of reliablility and operational redundancy.