2001-10-19 19:00:15

by Mike Castle

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Subject: e2fsck, LVM and 4096-char block problems


Using Linus' 2.4.10, unpatched. (Perhaps I need to patch the LVM stuff ;-)

I wanted to extend /usr/src from 19G to 20G.

I umounted /usr/src, lvextend -L +1G /dev/vg01/src, fsck -f /usr/src,
resize2fs /dev/vg01/src

resize2fs tells me to run fsck. Hmmmm... I just did.

I poke around a bit more and notice the following:

Oct 19 11:45:41 thune kernel: ll_rw_block: device 3a:00: only 4096-char
blocks implemented (1024)

Of course, dumpe2fs says:
Block size: 4096

I tried -f on the resize, and got LOTS of the 4096-char messages.

Some perhaps pertinent information.

thune:~# vgdisplay /dev/vg01
--- Volume group ---
VG Name vg01
VG Access read/write
VG Status available/resizable
VG # 0
MAX LV 256
Cur LV 9
Open LV 8
MAX LV Size 255.99 GB
Max PV 256
Cur PV 5
Act PV 5
VG Size 150.29 GB
PE Size 4 MB
Total PE 38473
Alloc PE / Size 28746 / 112.29 GB
Free PE / Size 9727 / 38 GB
VG UUID xdzl14-LsZ2-IA1c-dGk4-F8EK-xPlt-DV31mQ


thune:~# lvdisplay /dev/vg01/src
--- Logical volume ---
LV Name /dev/vg01/src
VG Name vg01
LV Write Access read/write
LV Status available
LV # 1
# open 0
LV Size 19 GB
Current LE 4864
Allocated LE 4864
Allocation next free
Read ahead sectors 120
Block device 58:0


Obviously I have the option of creating a new volume and moving things over
to that, but that sort of defeats the purpose of these particular tools.

Recommended course of action?

mrc
--
Mike Castle [email protected] http://www.netcom.com/~dalgoda/
We are all of us living in the shadow of Manhattan. -- Watchmen
fatal ("You are in a maze of twisty compiler features, all different"); -- gcc


2001-10-19 19:25:07

by Andreas Dilger

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Subject: Re: e2fsck, LVM and 4096-char block problems

On Oct 19, 2001 11:59 -0700, Mike Castle wrote:
> Using Linus' 2.4.10, unpatched. (Perhaps I need to patch the LVM stuff ;-)

Very bad combination. Don't use 2.4.10, don't use stock Linus LVM.

> resize2fs tells me to run fsck. Hmmmm... I just did.

Fsck may not work on 2.4.10.

> Oct 19 11:45:41 thune kernel: ll_rw_block: device 3a:00: only 4096-char
> blocks implemented (1024)

Known problem fixed in more recent LVM.

Cheers, Andreas
--
Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto,
\ would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert

2001-10-19 19:35:19

by Mike Castle

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Subject: Re: e2fsck, LVM and 4096-char block problems

On Fri, Oct 19, 2001 at 01:25:13PM -0600, Andreas Dilger wrote:
> On Oct 19, 2001 11:59 -0700, Mike Castle wrote:
> > Using Linus' 2.4.10, unpatched. (Perhaps I need to patch the LVM stuff ;-)
>
> Very bad combination. Don't use 2.4.10, don't use stock Linus LVM.

I hadn't built 2.4.12 yet.

What needs to be done to get recent LVM into stock kernel?

I feel like it's the 2.2 RAID stuff all over again.

mrc
--
Mike Castle [email protected] http://www.netcom.com/~dalgoda/
We are all of us living in the shadow of Manhattan. -- Watchmen
fatal ("You are in a maze of twisty compiler features, all different"); -- gcc

2001-10-19 19:48:19

by Andreas Dilger

[permalink] [raw]
Subject: Re: e2fsck, LVM and 4096-char block problems

On Oct 19, 2001 12:35 -0700, Mike Castle wrote:
> > On Oct 19, 2001 11:59 -0700, Mike Castle wrote:
> > > Using Linus' 2.4.10, unpatched. (Perhaps I need to patch the LVM stuff ;-)
> > Very bad combination. Don't use 2.4.10, don't use stock Linus LVM.
>
> What needs to be done to get recent LVM into stock kernel?
>
> I feel like it's the 2.2 RAID stuff all over again.

Well, it is mostly up-to-date in -ac, but I think the Sistina folks have
given up on submitting it to Linus. I do a bit now and then, but haven't
made much of a real effort to get it fully up-to-date. Maybe now that the
whole block-device changes have settled down again I will submit a few
patches.

Cheers, Andreas
--
Andreas Dilger \ "If a man ate a pound of pasta and a pound of antipasto,
\ would they cancel out, leaving him still hungry?"
http://www-mddsp.enel.ucalgary.ca/People/adilger/ -- Dogbert