Slinger said:
Could you explain this for me ? im a noob to benchmarks, I assume this means very good ?
I might consider doing this then, but have to learn the different raid setups too
Sorry, forgot to get back to you on this.
RAID-0 known as "striping" involves splitting data across X disks. There is no redundancy offered, hence each drive used in the "array" introduces an X-fold increase in the MTBF (mean time between failures). For example, in my setup above, I am using 2 Seagate 7200.10 320Gb drives. This effectively doubles my data transfer capabilities and with SATA-II, sends burst rates through the sky.
Given the MTBF of approximately 1.2 million hours of the Seagate's (137 years) (source - review websites), the chance of failure in RAID-0 is slim, but still up to double that of the Raptor 150Gb (Also 1.2 million hours). In fact, the RAID-0 Seagate failure time is theoretically the same as the RAPTOR-X (Windowed - 60 million hours) or approximately 68.5 years use.
Anyways, that aside, the point I was making was that for around £130+VAT, you can have two Seagates giving you far greater performance than a single raptor, generating less heat and running quieter - plus have 4x the storage capacity - as long as you are willing to accept the slightly increased risk of failure.
Of course, you could always RAID-0 two Raptors and beat the performance (possibly) but for that money you could stripe 4 Seagates, have 1.2Tb of storage and faster performance again...
As for RAID (Redundant Array of Independant Disks) configs, the most common three are:
RAID-0 - striping, no parity. Fast but increased risk of data loss in drive failure.
RAID-1 - mirroring, two copies of the same data. No performance increase.
RAID-5 - Striping with parity drive. One drive holds "parity" information used to reconstruct data on a failed drive. The drive may be rebuilt onto a blank drive, but only one drive can fail at a time if data is to preserved. The array is vulnerable until the data has been rebuilt. Because of the generation of parity data, write performance is generally slow on RAID-5 without a dedicated hardware RAID controller.
RAID-6 and RAID-10 are variations on the above. RAID-6 is RAID-5 but can sustain 2 simultaneous drive failures. RAID-10 is 2 mirrored RAID-5 arrays.