Stephen Harris wrote: > On Fri, Aug 22, 2008 at 08:41:25PM +0300, Jussi Hirvi wrote: > > How about simply > > % mdadm --grow /dev/md3 > > % mdadm --grow /dev/md3 > mdadm: no changes to --grow > > > What do you get with > > % mdadm --detail /dev/md3 > > /dev/md3: <snip> > Number Major Minor RaidDevice State > 0 8 1 0 active sync /dev/sda1 > 1 8 18 1 active sync /dev/sdb2 > 2 8 35 2 active sync /dev/sdc3 > 3 8 52 3 active sync /dev/sdd4 > > 4 8 65 - spare /dev/sde1 Stephen, I don't think you can grow it without backing it up, destroying it, rebuilding it with 5 devices, then restoring. >From the man page: Grow Grow (or shrink) an array, or otherwise reshape it in some way. Currently supported growth options including changing the active size of component devices in RAID level 1/4/5/6 and changing the number of active devices in RAID1. I take it to mean you can grow the segment size on all devices in the array, say you swapped out 160GB drives with 320GB drives one by one and now you want your array to fill up the remaining 160GB, then you can grow it, but you can only add devices to a RAID1... What do you think this is ZFS? Sheesh! -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.