Hi again, I answer to myself. It seems that the array needs to be assembled with "--update devicesize", so that later the "--grow --size=max" could really work. It also seems that "--update" works only with "--assemble". Is there any way to update the device size "live", i.e. without stopping and re-assembling the array? (and without failing/removing/adding components?). Thanks, bye, pg On Sat, Apr 11, 2009 at 12:34:33AM +0200, Piergiorgio Sartor wrote: > Hi again, > > I made a quick test, but that does not seem to > work, at least with RAID-6. > > What I did was to create 4 loop devices of 128MB > and then a RAID-6, metadata 1.1, on top of that. > The I stopped the array and the loop, I added > another 128MB (added as in "dd ... >> file"), > run "losetup" again and "mdadm -A ...". > Then "mdadm --grow --size=max ...", but the size > of the array did not change from 256MB (2x128MB). > The loop devices are 256MB (wc -c /dev/loop..). > > So, either I'm missing something or this type of > grow does not seem to affect RAID-6. > > Any ideas? > > Thanks again, > > bye, > > pg > > On Fri, Apr 10, 2009 at 10:58:33PM +0100, Robin Hill wrote: > > On Fri Apr 10, 2009 at 11:54:35PM +0200, Piergiorgio Sartor wrote: > > > > > Hi all, > > > > > > is it possible to grow a RAID-6, not by adding > > > more drives, but by extending the partions which > > > are composing the array? > > > > > > In other words, let's say I've "n" partitions of > > > "x" GB forming a RAID-6 array. After some time I > > > increase the size of each partition to "y" GB, of > > > course y > x. > > > Is it then possible to use the complete space > > > growing the array? > > > How? > > > > > Yes - "mdadm --grow --size=max /dev/mdX". You'll also need to grow the > > filesystem afterwards of course. > > > > Cheers, > > Robin > > -- > > ___ > > ( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> | > > / / ) | Little Jim says .... | > > // !! | "He fallen in de water !!" | > > > > -- > > piergiorgio > -- > 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 -- piergiorgio -- 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
