df, lvm and 6TB arrays oh my!
Robert Locke
lists at ralii.com
Tue Feb 14 17:16:48 UTC 2006
On Tue, 2006-02-14 at 11:58 -0500, Mark Haney wrote:
> Mark Haney wrote:
> >>>
> >>
> >> Well, now we're in the not so good news....
> >>
> >> Just doing the math....
> >>
> >> (Block count * Block size) / 1024^4
> >> (632648704 * 4096) / 1024^4 = 2.35 TB
> >>
> >> So, what you are seeing in df is accurate as far as the filesystem is
> >> concerned....
> >>
> >> So, my thoughts are that perhaps someone originally created the logical
> >> volumes at 2.4TB, created the filesystems, and then tried to extend the
> >> logical volumes with lvextend? Of course, while lvextend will grow the
> >> underlying logical volume it does not grow the filesystem. That is done
> >> with the ext2online command, if the filesystem is mounted, and with
> >> resize2fs if the filesystem is unmounted.
> >>
> >> Can you check to see which of those two utilities you have available in
> >> FC2? Whether you have both resize2fs and ext2online? Of course,
> >> resizing the filesystem is potentially dangerous and presumes good
> >> quality backups, and read, lots of disclaimers at this point about
> >> eating your data for lunch......
> >>
> >> --Rob
> >>
> >>
> >>
> > I created the volumes myself, all at once. I verified the size of the
> > volume at each step. I had thought that it's possible that ext3 only
> > formatted the 2.4TB extent and that resizing it might work.
> > Fortunately I have one of these volumes not in use so I can test that
> > and see how it goes. Thanks for all your help on this.
> >
> >
> Just an update on this. It seems as if the mke2fs version that comes
> with FC2 when used with a large lvm volume will only create the fs up to
> 2TB. When I used resize2fs on the volume the system extended the fs to
> the full extent of the volume. Thanks Robert, for all your help on
> this. I certainly do appreciate it.
Well, that's cool that it extended it at least.... Congrats! :-)
--Rob
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