On 28/09/09 02:11, Ross Walker wrote: >> Eg. to convert this setup into a raid-5 : start with a 1 disk raid-1 >> degraded, move a disks worth of data onto there, bring in the second >> disk and let them sync into a 'normal' raid1 state, then convert that >> into a raid-5 with the 3rd disk. then bring in the 4th disk as >> hotspare. >> >> with TiB's worth of data, its not going to be quick. > > Can you convert a RAID0 to a RAID5? How would you create a 1 disk degraded raid0 :) well, you could - but you wont get any data onto it! So you would need to start with 2 disks, and with that you then need to store 2 disks worth of stuff somewhere while this is building[1]. - KB [1]: there are h/w based cards that are known to convert a raid-0 to a raid-1 and then onto a raid-5 and then 6. so there are ways and means to implement it.