Neil Brown a écrit : > On Thursday March 1, jpiszcz@xxxxxxxxxxxxxxx wrote: >> You can only grow a RAID5 array in Linux as of 2.6.20 AFAIK. > > There are two dimensions for growth. > You can increase the amount of each device that is used, or you can > increase the number of devices. > > You are correct that increasing the number of devices only works for > RAID5 (and RAID1, but you don't get extra space) in 2.6.20 (RAID6 > coming in 2.6.21). > > However this question is about growing an array the first way: > increasing the amount of space used on each devices, and that is > supported for RAID1/4/5/6. > > And Laurent: > 1/ Yes, it is that easy > 2/ I doubt a nearly-full ext3 array increases the risk > 3/ The effect of adding a bitmap is that if you suffer a crash while > the array is degraded, it will resync faster so you have less > exposure to multiple failure. I just finished changing disks, growing the array, and then the filesystem. It worked flawlessy. Just a little notice: I had to unmount my ext3 filesystem to be able to resize it. (Took ~8 hours to fsck + resize the 15 disks array from 6 to 9TB on a dual Xeon with 4GB RAM). Thanks Laurent - 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
