RE: [linux-lvm] Problem doing basic LVM functions

[Ming Zhang <mingz@ele.uri.edu>]

blind guess, lvm sometime do block device scan and search for metadata,
u happen to have nbd module available or compiled in kernel. so if you
set a skip list for all u nbd devices, or disable the nbd in u kernel, u
might be able to solve this.

but nbd code should check if nbdX is configured or not.

ming


On Wed, 2006-05-17 at 11:52 -0400, Ricardo Sanchez wrote:
> Toby
> 
> Thanks for the reply. I am not using nbd nodes...the kernel started throwing
> out those messages I have never worked with nbd nodes. How can I destroy the
> nbd nodes? I just want to start all over again but can't. Every time I try
> to do lvm functions, it hangs on those messages.
> 
> Thanks
> 
> Ricardo
> 
> -----Original Message-----
> From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On
> Behalf Of tkb9@adelphia.net
> Sent: Wednesday, May 17, 2006 10:19 AM
> To: LVM general discussion and development
> Subject: Re: [linux-lvm] Problem doing basic LVM functions
> 
> ---- Ricardo Sanchez <sanchez.ricardo@gmail.com> wrote: 
> > I created a basic volume group named "uservg" and added two PVs to it
> > successfully.
> > 
> > After doing this, I deleted the partitions to the disks...
> > Every time I try to do a vgscan or vgremove it gives the following output:
> > 
> > nbd0: Attempted send on closed socket
> > end_request: I/O Error, dev nbd0, sector 0
> > printk: 7 messages suppressed.
> > Buffer  I/O Error on device nbd0, logical block 0
> > Buffer  I/O Error on device nbd0, logical block 1
> > Buffer  I/O Error on device nbd0, logical block 2
> > nbd0: Attempted send on closed socket
> > /dev/nb0: read failed after 0 of 4096 at 0: Input/output error
> >  /dev/nb0: read failed after 0 of 4096 at 2199022141440: Input/output
> error
> >   /dev/nb0: read failed after 0 of 4096 at 0: Input/output error
> >   /dev/nb1: read failed after 0 of 4096 at 2199022141440: Input/output
> error
> 
> Are you trying to use nbd nodes in LVM?
> 
> I had the same problem using nbd & LVM. I first had to destroy & recreate
> the nbd nodes.  I put each nbd node into a single disk md, & used the md
> nodes in my pv & vg. 
> 
> Been working fine that way for several months now, although running locate
> to find a file would crash the system, so I removed the slocate rpm.
> 
> -Toby
> 
> 
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