On Tue, 2004-09-07 at 15:11, Christopher J. Bottaro wrote: > Matthew Miller wrote: > > all RAID 0 does is double your chance of catastrophic > > drive failure. > > what about doubling your read/write speed? =P > > p.s. i do understand that you won't get exactly linear speedup for each hard > drive added to a RAID-0, but i'm just sayin... > Every raid structure has benefits and disadvantages. raid 0 -- striping -- faster writes than single drives at the disadvantage of more failure points and no redundancy raid 1 -- mirroring -- faster reads & redundancy - at the expense of doubled physical drives and slower writes raid 5 -- striping with parity -- faster writes, more fault tolerant, less extra hardware than raid 1 -- at the expense of slower write than raid 1 due to the parity stripe that has to be written. This is not an exhaustive list, but just note that the only improvement with raid 0 is read/write speed and an overall loss of reliability because of the increased failure points. IF your slowdown is the actual drive IO then raid 0 can produce and improvement, BUT ..... . Please always analyze the actual problem and then decide which is best. Many do not need the gain from using raid 0 (but some do).
