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what exactly is RAID?

a way you can arrange your hard drives for performance, or redundancy, or both. depending on what you are looking for, what your system will support, and how many hard drives you have.
 
Originally posted by: ddviper
how many drives do u need to run RAID 0+1 or 10?
Click to expand...

4.

RAID = Redundant Array of Independent/Inexpensive Disks.

Although SCSI drives are not inexpensive, and RAID 0 has no redundancy. 😕
 
Originally posted by: SagaLore
Originally posted by: ddviper
how many drives do u need to run RAID 0+1 or 10?
Click to expand...

4.

RAID = Redundant Array of Independent/Inexpensive Disks.

Although SCSI drives are not inexpensive, and RAID 0 has no redundancy. 😕
Click to expand...


No, RAID0+1 only needs 3 discs. No clue about RAID10.
 
Although SCSI drives are not inexpensive, and RAID 0 has no redundancy.
Click to expand...

Point taken, however, "inexpensive" is a relative term. To an enterprise, a $500 SCSI HD is not expensive if it contains data that is critcal to the needs of the business and would cost them comsiderably more to replicate if lost.
 
Originally posted by: twitchee2
so it just makes lets say 4 HDDS work as one?
Click to expand...


Ugh. Nope not that simple. Only 4 discs in a RAID0 config would do that. Problem with RAID0 is that there is no "R" (redundancy). Effectively, RAID0 is faster to write/read because the whole process is split between N discs in your array. However, if you had a RAID0+1 config (striping + mirroring) and one of your discs failed you could restore your data on all discs. The performance gains with RAID are not really the reason to run RAID. Afterall the first word here is Redundant. Its meant to maintain data integrity.
 
Originally posted by: dartworth
Just take a look @ the link I post...
Click to expand...


Interesting, i have read that RAID 0+1 can be inplemeted with 3 discs (striping x2, mirror x1 size of x2 combined). Is this true or were my sources wrong?
 
Can... not... resist....

It is also a brand of nerve toxins sold in a container that is used to change insects from a moving to permanently unmoving state. grins, ducks, runs away...
 
Originally posted by: homercles337
Originally posted by: dartworth
Just take a look @ the link I post...
Click to expand...


Interesting, i have read that RAID 0+1 can be inplemeted with 3 discs (striping x2, mirror x1 size of x2 combined). Is this true or were my sources wrong?
Click to expand...

I suppose you could do this (if the controller supports it!), but it would almost totally negate the performance benefits (although you would still have redundancy for a single drive failure).

That would be a VERY unusual RAID0+1 setup.
 
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