Getting OT but... Something I like with Raid1 is when I want to upgrade, update or modify in any way the installation. I simply degrade the array right before the modif so that I work on only one device (say sda1) and the other (say sdb1) become the pre-modif backup. The the modification is done at the normal speed of a single drive, not hammed by the slow writes of the raid1, once done and tested I can re-add sdb1 and sync.
Or if there is any complication during the modif, you get the great warm feeling of having a perfect backup in sdb1. =) Simon On Feb 7, 2008 7:31 AM, Rasmus Andersen <[EMAIL PROTECTED]> wrote: > On Thu, Feb 07, 2008 at 06:50:57AM -0500, Simon Turner wrote: > > Hi Rasmus, > > you will first need to resize your md device. Using mdadm, that > > would be done with --grow (check the man, `mdadm /dev/md123 --grow > > --size=500G` should do the trick). > > Ah yes, thanks for that. For some reason I had not noted that use of > --grow... mdadm /dev/md0 --grow --size=max did the trick nicely thanks. > > > But that will leave your filesystem intact at the current size, so > > you'll have to resize the filesystem next. I know ext2&3 support > > "growing" but I don't know about other filesystems. > > I use LVM(2) and ext3 so I am ok there. > > > However, since it's a simple raid one, you could create a new raid > > device with one drive, format it at 500G, copy the stuff over from the > > old raid1, drop the old raid1 device and add it to the new one. > > Yes, thats true. But since this is my root, var, home, etc etc that > would require me to go to single-user mode for the duration of the copy. > The resync-in-background is much nicer :) > > Thanks for your help. > > Cheers, > > Rasmus > -- > gentoo-user@lists.gentoo.org mailing list > > -- When Earth was the only inhabited planet in the Galaxy, it was a primitive place, militarily speaking. The only weapon they had ever invented worth mentioning was a crude and inefficient nuclear-reaction bomb for which they had not even developed the logical defense. - Asimov -- gentoo-user@lists.gentoo.org mailing list
