On Thu, Nov 17, 2011 at 1:59 PM, Mark Knecht <markkne...@gmail.com> wrote: > On Thu, Nov 17, 2011 at 10:43 AM, Michael Mol <mike...@gmail.com> wrote: >> On Thu, Nov 17, 2011 at 1:29 PM, Mark Knecht <markkne...@gmail.com> wrote: > <SNIP> >>> At this point I was told: >>> >>> "Now, resize your filesystem to use the additional space." >>> >>> So, if at this point the end-block of sda6 isn't 976768064 but, let's >>> say, 700000000 because mdadm set it to something new, then using your >>> suggestion I guess I'd set it back to 976768064? I'm not comfortable >>> however that if I do that that whatever is out there beyond 700000000 >>> is really formatted as ext3 and 'empty' as I don't know what the mdadm >>> conversion has done to it. >> >> Your resize would be applied not to /dev/sd?, but to /dev/md?. You >> don't need to worry about what that means on /dev/sd*; the filesystem >> you want to poke is on /dev/md*. >> >> file -s /dev/sd* /dev/md* >> >> -- >> :wq > > Yes, resize would be done to /dev/md?. I agree. However I don't > believe that I'd use Neil's suggestion of fdisk block numbers on > /dev/md, right? That doesn't make sense to me and I don't beleieve > Neil was suggesting anything like that. > > I'm thinking that possibly the mdadm way to change the _size_ of a > RAID is to once again use the grow option: > > <quote> > -G, --grow > Change the size or shape of an active array. > <quote> > > I've not yet found any instructions that I trust to do it though, and > being that the instructions above came from, among others, Neil Brown > who manages mdadm I'm hesitant to go in my own direction. I'm just > looking before I leap. > > And fortunately, if I decided to just blow away all three disks and > start from scratch I have very little at risk that way, and very > little risk as I will do backups of the RAID-1 onto an external USB > drive before I start this process anyway.
Ok, I thought you had it clear how you were going to resize the raid, and needed help resizing the filesystem that already existed on top of the RAID. I interpreted Mark's instructions as operating under that impression, too. Are you saying you don't already have a partition table sitting on top of /dev/md? ? -- :wq
