On Tuesday April 18, ewan.grantham@xxxxxxxxx wrote: > On 4/18/06, Neil Brown <neilb@xxxxxxx> wrote: > > No, this is not correct. > > md/raid0 has no problem with devices being of different sizes. It > > will make use of all the space doing as much striping as possible. > > In that case, the other question would be if you can grow a RAID 0 > array. Currently, one pair of disks have my remaining data. The idea > was to set the other pairs to RAID 1 arrays, link them with LVM (or > RAID 0) into one partition, copy the data, then convert the remaining > pair of disks to a RAID 1 array and grow the RAID 0 array to add the > additional RAID 1 array. No, you cannot grow an md/raid0 array. If you need growth, then you would need to consider LVM at this stage, though md/linear will probably be able to grow soon. > > > However it sounds like your drive or your controller is not to be > > trusted. There is a reason that it is failing. Maybe raid5 triggers > > that reason more often, but that doesn't mean that raid1 won't > > trigger it at all. I suggest you be very wary of your hardware! > > Suspicious is the word for it. Which is why I'm not going back to RAID > 5 using my current configuration. My drives are all external USB-2, > and split between some ports on front, some on back, and some on an > add-on card. My guess is that I had an arrangement that was swamping > the channels. I've played around with what is attached where in a > manner that appears to have "fixed' that. I've always felt that raid over USB was a "courageous" design. USB has such a "temporary" feel to it. However, if it work for you, great. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
