On Monday August 15, djani22@xxxxxxxxxxxxx wrote: > Thanks, I will test it, when I can... > > In this moment, my system is an working online system, and now only one 8TB > space what I can use... > Thats right, maybe I can built linear array from only one soure device,but: > My first problem is, on my 8TB device is already exists XFS filesystem, with > valuable data, what I can't backup. > It is still OK, but I can't insert one raid layer, because the raid's > superblock, and the XFS is'nt shrinkable. :-( > > The only one way (I think) to plug in another raw device, and build an array > from 8TB-device + new small device, to get much space to FS. > > But it is too risky for me! Yes, I wouldn't bother just for testing. I've managed to put together some huge devices with spare files and multi-layer linear arrays (ext3 won't allow files as big as 2TB) and I am happy that the patch works. Longer term, I have been thinking of enhancing mdadm so that when you create a linear array, it copies the few blocks from the end that will be over written by the superblock onto the start of the second device. This would allow a single device to be extended into a linear array without loss. (I also have patches to hot-add devices to the end of a linear array which I really should dust-off and get into mainline). > > Do you think it is safe? > > Currently I use 2.6.13-rc3. > This patch is good for this version, or only the last version? > > Witch is the last? 2.6.13-rc6 or rc6-git7, or 2.6.14 -git cvs? :) The patch should be good against any reasonable recent version of 2.6. I always work against the latest -mm, but this code has been largely untouched for a while so there shouldn't be any patch conflicts. 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
