[linux-lvm] Re: mkfs - cannot set blocksize

[linux-lvm] Re: mkfs - cannot set blocksize

[Nathan Scott]

hi,

On Thu, Jun 06, 2002 at 04:35:51PM +0200, Roy Sigurd Karlsbakk wrote:
> linux ia32 only supports 4kB block size

4K pagesize, not blocksize.  [filesystem] blocksizes smaller than 4K
are also supported.  Thats unrelated to this problem though, which is
related to the device driver blocksize... mkfs is trying to tell the
device to do IOs in 512 byte chunks, but its not listening.  There's
some corner cases where mkfs will fail if the device driver ignores
its request to change the device block size.

> On Thursday 06 June 2002 16:27, Marek.Les@firma.seznam.cz wrote:
> > Hello,
> >
> > I am trying to test XFS with LVM and I've encountered this error while
> > trying to do mkfs.xfs on the LVM logical volume:
> > 
> > mkfs.xfs: warning - cannot set blocksize on block device
> > /dev/test_vg/test_lv: Invalid argument
> > I tried to find something in the mailing list but the only thing I found
> > was something about EVMS but no LVM stuff. Can anyone tell me, what exactly
> > this warning means and (if possible) how to get rid of it?
                                         ^^^^^^^^^^^^^^^^^^^^
We need to contact the LVM folks and ask them to implement the
BLKBSZSET ioctl (and while I'm at it, I'll mention that ENOTTY
should be returned instead of EINVAL for unrecognised ioctls,
apparently).

cheers.

-- 
Nathan

Re: [linux-lvm] Re: mkfs - cannot set blocksize

[Joe Thornber]

Nathan,

On Fri, Jun 07, 2002 at 09:21:37AM +1000, Nathan Scott wrote:
> We need to contact the LVM folks and ask them to implement the
> BLKBSZSET ioctl (and while I'm at it, I'll mention that ENOTTY
> should be returned instead of EINVAL for unrecognised ioctls,
> apparently).

I put this ioctl into device-mapper (LVM2 driver) recently, and will
suggest Heinz does the same for LVM1.  You're correct about ENOTTY,
thanks for pointing it out.

- Joe

Re: [linux-lvm] Re: mkfs - cannot set blocksize

[Heinz J . Mauelshagen]

On Fri, Jun 07, 2002 at 09:05:39AM +0100, Joe Thornber wrote:
> Nathan,
> 
> On Fri, Jun 07, 2002 at 09:21:37AM +1000, Nathan Scott wrote:
> > We need to contact the LVM folks and ask them to implement the
> > BLKBSZSET ioctl (and while I'm at it, I'll mention that ENOTTY
> > should be returned instead of EINVAL for unrecognised ioctls,
> > apparently).
> 
> I put this ioctl into device-mapper (LVM2 driver) recently, and will
> suggest Heinz does the same for LVM1.  You're correct about ENOTTY,
> thanks for pointing it out.

ENOTTY is in CVS.
Will change to using blk_ioctl once I am back from my trip.


> 
> - Joe
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

-- 

Regards,
Heinz    -- The LVM Guy --

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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[linux-lvm] Re: mkfs - cannot set blocksize

[Roy Sigurd Karlsbakk]

> 4K pagesize, not blocksize.  [filesystem] blocksizes smaller than 4K
> are also supported.  Thats unrelated to this problem though, which is
> related to the device driver blocksize... mkfs is trying to tell the
> device to do IOs in 512 byte chunks, but its not listening.  There's
> some corner cases where mkfs will fail if the device driver ignores
> its request to change the device block size.

ok. sorry. rephrasing.

Linux on IA32 does not support blocksize > pagesize, which means Linux on 
IA32 supports 512, 1024, 2048 and 4096 bytes per block
-- 
Roy Sigurd Karlsbakk, Datavaktmester

Computers are like air conditioners.
They stop working when you open Windows.