Re: Partition size discrepancy df v parted/cfdisk -SOLVED
On (22/01/04 19:55), Paul Morgan wrote:
> On Thu, 22 Jan 2004 23:57:44 +0000, Clive Menzies wrote:
> > On (22/01/04 14:31), Paul Morgan wrote:
> >> On Thu, 22 Jan 2004 15:05:01 +0000, Clive Menzies wrote:
> >> > I've just reorganised the partitions on a second (Seagate) drive in
> >> > a dual booting Dell Dimension XPS T500 to give more room to /usr
> >> > (to upgrade from woody to sid).
> >> >
> >> > The partitions I messed with were /home, /usr and two swap.
> >> >
> >> > /home was 35 Gb and /usr 1Gb
> >> >
> >> > Using parted I deleted home and created a new 5GB /usr partition and
> >> > 30Gb /home. Once I'd amended fstab and copied the /usr file across,
> >> > I deleted the old /usr and one swap partition to create a new bigger
> >> > swap partition and increased the remaining swap partition. All worked
> >> > fine and I've subsequently upgraded to sid and everything is back as
> >> > it should be.
> >> >
> >> > However, df -h gives (showing /usr as 1Gb):
> >> >
> >> > /dev/hdb2 92M 41M 47M 47% /
> >> > /dev/hdb9 958M 564M 346M 63% /usr
> >> > /dev/hdb6 958M 147M 763M 17% /var
> >> > /dev/hdb7 958M 80K 909M 1% /tmp
> >> > /dev/hdb10 29G 32M 28G 1% /home
> >> > tmpfs 252M 0 252M 0% /dev/shm
> >> >
> >> > whereas parted shows /usr (9) as about 5Gb:
> >> >
> >> > 2 0.031 94.130 primary ext2
> >> > 1 94.131 76316.594 extended lba
> >> > 5 94.162 651.071 logical linux-swap
> >> > 11 651.103 1427.651 logical linux-swap
> >> > 6 1427.682 2400.336 logical ext2
> >> > 7 2400.368 3373.022 logical ext2
> >> > 9 3373.053 8424.711 logical ext2
> >> > 10 8424.743 38421.079 logical ext2
> >> > 8 38421.110 76316.594 logical fat32
[snip]
> >>
> >> fsdisk and parted are showing the partiton size, whereas df is showing the
> >> *filesystem* size. You don't say how you "copied the /usr file across",
> >> but what you should have done is:
> >>
> >> Use mke2fs to create the filesystem on /dev/hdb9, e.g.:
> >>
> >> mke2fs /dev/hdb9
> >>
> >> Then you should have mounted the new filesystem, used cp to copy the
> >> current /usr to it, then changed /etc/fstab to reflect the new /usr and
> >> rebooted, or umounted the old /usr and mounted the new one, e.g.:
> >>
> >> mkdir /tmp/usr (or /mnt/usr if you prefer)
> >> mount /dev/hdb9 /tmp/usr
> >> cp -ax /usr /tmp
> >> umount /tmp/usr
> >> umount /usr
> >> mount /dev/hdb9 /usr
> >> <change the /etc/fstab also>
> >>
> >> It seems that you probably didn't do that, and somehow copied the old
> >> filesystem as a whole onto the new partition (keeping the old filesystem's
> >> size and wasting all the rest of the partition). Check out ext2resize man
> >> page to fix.
> > Brilliant! ;) Thanks Paul for a great explanation. I used rsync -opg to copy
> > the /usr files across <thinks> must read man pages prior to significant
> > tasks</thinks>
> >
> > Tomorrow, I will dutifully read ext2resize man page and fix it. Reading the
> > parted user manual suggests that "parted resize" could also be used to fix it?
> >
[snip]
> Clive,
>
> Just "ext2resize /dev/hdb9" should do the trick.
>
> Yes, I'm a Welsh expat living in Kissimmee, Florida. And no, I don't get
> to vote: I'm still a British citizen, a permanent resident alien. My
> wife, however, is a Kentucky girl, so she votes for the both of us, so to
> speak :)
Thanks Paul, somewhat belatedly I ran ext2resize and hey presto "df -h"
shows /usr as 4.9Gb.
Regards
Clive
> --
> ....................paul
>
> It is important to realize that any lock can be picked with a big
> enough hammer.
> -- Sun System & Network Admin manual
>
>
>
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--
http://www.clivemenzies.co.uk
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