Hi, On Wed, May 13, 2009 at 10:01 AM, Neil Brown <neilb@xxxxxxx> wrote: > On Tuesday May 12, lrhorer@xxxxxxxxxxx wrote: >> >> But doesn't creating the array with the drive wipe the contents? If so, it >> doesn't seem to me this provides much redundancy. > > No. Creating an array does not wipe the contents. > It might cause a resync which will copy contents from one drive to the > other and I don't promise which one. > However if you: > Now, my question is that what if I create a RAID1 with 100 disks on each side. Do you mean to say that there will be unnecessary resync happening there as well, that too for unallocated/written data. If thats the case, we surely need to handle these two situations differently (1) which neil mentioned (2) the one I mentioned above. Remember I referring to the case of creation. > mdadm -C /dev/md0 --level 1 -n 2 /dev/foo missing > mdadm /dev/md0 --add /dev/bar > > then the contents on /dev/foo will not be changed (except for a few K > at the end for the metadata) and then all of foo will be copied to > bar. > Will the create happen at the first place? > 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 > -- Regards, Sandeep. “To learn is to change. Education is a process that changes the learner.” -- 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
