Thanks to everyone for replying, it is indeed a simple operation and completes immediately. I was just worried since I equate grow more to an array reshape than to a management/tune option. I guess it's just my paranoia showing thru... :) G > -----Original Message----- > From: Roman Mamedov [mailto:roman@xxxxxxxx] > Sent: Friday, June 11, 2010 12:42 AM > To: Graham Mitchell > Cc: linux-raid@xxxxxxxxxxxxxxx > Subject: Re: RAID6 and crashes (reporting back re. --bitmap) > > On Fri, 11 Jun 2010 00:31:57 -0400 > "Graham Mitchell" <gmitch@xxxxxxxxxxx> wrote: > > > Can you do this on a live array, or can it only be done (as the docs > > seem to suggest), with the create, build and grow options? > > It is a variant of the grow operation, but it can be done on a live array, even > mounted, and completes instantly: > > mdadm --grow /dev/md0 --bitmap=internal --bitmap-chunk=131072 > > In my experience, removing the bitmap (setting it to none) may occasionally > fail (probably when the array has a lot of outstanding write requests), but > just try again when it's a bit quieter, and it'll work. > > -- > With respect, > Roman -- 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
