-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, Oct 03, 2016 at 04:24:42PM -0400, Ken Heard wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > In my jessie box I need to increase the non-encrypted root partition > (/) size from 14G to 19G. I was able successfully to increase the > logical volume (and decrease the space available in the volume group > accordingly) but am not sure how to do the next step. > > The following command produced the result shown. > > root@BDS:~# fsadm resize /dev/BDS1/root > resize2fs 1.42.12 (29-Aug-2014) > Filesystem at /dev/mapper/BDS1-root is mounted on /; on-line resizing > required
Online resizing means "resizing a mounted file system". This is possible (for ext*), as long as you are growing, not shrinking. But that's your case. > old_desc_blocks = 1, new_desc_blocks = 2 > resize2fs: Read-only file system While checking for on-line resizing > support > fsadm: Resize ext4 failed That's because your / partition is mounted read-only. This might be because there were some errors at mount, so perhaps running a file system check (fsck.ext4) might be a good idea. If you *know* your file system is OK, you could try to remount it read-write: mount -orw,remount /dev/mapper/BDS1-root / then resizing should work. > Does the phrase "on-line resizing required" mean that I have to > unmount /dev/BDS1/root, then run the fsadm command and finally remount > /dev/BDS1/root? Is unmounting the basic partition (/) safe while > presumably some of the files there are being used by the computer? No, see above. And you can't umount / (you'd get an error stating that the file system is busy. / is always busy). > I think I read somewhere that to resize an ext4 partition did not > require unmounting it. Perhaps it it is required. Only for shrinking. In that case you'd have to mount the file system from "another running system", e.g a rescue system. regards - -- tomás -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlfywUwACgkQBcgs9XrR2kZKLgCfZ1RX/83DNwjv7/t2hm6g1DHF FMkAn3/GwlIUvwkBI5u0sAy9qa1KD56A =duk4 -----END PGP SIGNATURE-----
