-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Bill Rugolsky Jr. wrote: > On Tue, Nov 15, 2005 at 02:45:24PM +0000, Craig McLean wrote: >> I'm going to stick Solaris 10 on my laptop (this is not an advocacy >> post, just for info) and to do so I need to free up some physical space >> on my disk which is currently allocated to LVM2. > >> 5) with fdisk, delete the partition entry and recreate from same >> starting block, but ending the partition ~10Gb short of where it ends now. > > This will almost certainly hose your system; you need to resize > the physical volume (PV). You might be able to do this by doing a > resize2fs/lvreduce, making sure that no physical extents (PEs) are in > use above some offset (probably the case if it was a linear contiguous > allocation), do a vgcfgbackup of the LVM2 metadata (which is in text form; > hooray!), hack it to reduce the extent counts, and then do a vgcfgrestore. Gotcha. Hopefully once the filesystem is resized down and the lvreduce is done, moving the physical partition boundary will not destroy any allocated PEs, good call on the vgcfgbackup/restore. I wouldn't know where to start working out the new PE count for the restore though... Will vgdisplay show me the new PE count after the resize? > Alternatively (and "more safely"), you could plug in a USB2 drive, and do a > pvmove/vgreduce/pvremove/fdisk/pvcreate/vgextend/pvmove. [I say "more safely" > in scare quotes, because using usb-storage for multi-gigabyte copies > can cause problems on lots of lousy USB hardware.] I have a 40Gb USB2 disk which works well on this box, so maybe I'll consider at least mirroring to that first, in case everything goes runny. > Finally, it might just be easier to do a full backup and restore, especially > if your laptop has a GigE interface. Maybe. It's certainly possible as a last resort if everything screws up or is going to take more than a couple of hours. > If this is only for experimentation, perhaps you might consider installing > Solaris 10 to run under Xen? I believe there is a port to Xen domU. Nope, permanent change, and this lappy only has 256Mb, so VM's are pretty much out of the question. You've been a great help, Bill. Thanks indeed! Craig. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDegOnMDDagS2VwJ4RAgr5AKCgPFG0P4gkmO8G1PZD5Naju6jqNgCfR+ee DOTsKQfymWWcPlkDG6IT+Qs= =EOn3 -----END PGP SIGNATURE-----
