On 11/15/2010 12:00 AM, John Reiser wrote: > On 11/14/2010 01:13 PM, Matt McCutchen wrote: >> On Sun, 2010-11-14 at 13:07 -0800, John Reiser wrote: >>> When I created 14 partitions using a DOS partition label >>> (3 primaries, plus extended containing 10 logical partitions) >>> and gave 6 of the partitions to an LVM setup, >>> then I could not remove one of the partitions from the clutches >>> of the LVM, and use the removed partition for some other purpose >>> (keeping the rest of the LVM going), unless I removed all the LVM >>> from that drive. >> >> vgreduce + pvremove? Did something go wrong when you tried? > > vgreduce would not let go of the partition that I wanted to take back, > claiming that the partition was still in use. > ----- > DESCRIPTION > vgreduce allows you to remove one or more *unused* physical volumes > from a volume group. [emphasis added] > ----- > I could not find a way to evict any usage of that partition (transparently > move the information somewhere else in the same LVM) as a prelude to applying > vgreduce. In theory I could have moved all of the LVM onto another drive, > but I wanted to keep the LVM going on that drive, with the same user-visible > information content [there was enough free space], but without using one > particular partition that I had given [loaned] to LVM some time before. > pvmove is the command you need to use before doing a vgreduce. That's basically what I did with the 30TB system that I mentioned elsewhere in this thread. This system was partitioned into 10 raid-5 volumes and one of those acted up when we put the system into production (it was already pre-filled with data). So what I did was a pvmove to clear out the physical volume which took a few hours and then I removed the physical volume from the volume group. The fact that I could do all of this while the system stayed online and was being used was a real life saver. Regards, Dennis -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel
