2-VelociRaptor raid 0 or 3 WD Caviar Blue (7200) raid 0 ???

[Guest strider]

Hey guys,

I want to set up RAID 0 hard drive.

My choices are (2) VelociRaptor 150GB 10000 RPM 16MB Cache SATA 3 at $160 a piece

OR

(3) WD Caviar Blue 250GB 7200 RPM 16MB Cache SATA 3  at $47 a piece.

What's faster on the raid 0; 2 faster drives or 3 slower drives on raid 0

VelociRaptor-

Performance

Interface SATA 3.0Gb/s

Capacity 150GB

RPM 10000 RPM

Cache 16MB

Average Seek Time 4.2ms

Average Write Time 4.7ms

Average Latency 3ms (nominal)

Cavier Blue

Performance

Interface SATA 3.0Gb/s

Capacity 250GB

RPM 7200 RPM

Cache 16MB

Average Seek Time 8.9ms

Average Write Time 10.9ms

Average Latency 4.2ms

[Wolter van der Spoel]

the raptors will give the best results, depends on what you want to spend on it

[Ian Routley]

Perhaps the 300Gb Velociraptors? x 2

Also - the more array members in RAID0 the more the array is vulnerable to failure of a single element (ie HD drive).

[Maurice_King]

ANY RAID set up is vulnerable from the failure of a HDD in that array unless you back it up regularly and is generally nonrecoverable from that failure.

The only recoverable RAID arrays are RAID5 , 6  or 1+0 more commonly known as RAID10.

[Ian Routley]

I guess what I meant was that - if you set up RAID0 with 4 drives, then you are 2 x more likely to have a catastrophic failure than you are with RAID0 on two drives.

ie chance of a single drive failing x 4 (or in the suggested case x3)