looking for non existent devices

looking for non existent devices

[Helmut Hullen]

Hallo, linux-btrfs,

some commands still look for non existent devices.

I don't use "udev".
When I run

        btrfs filesystem show

only the existent devices are shown - fine.

When I run

        btrfs filesystem label

or

        btrfs scrub status /dev/sdxn

then I get a lot of error messages with (p.e.)

  failed to read /dev/hda6: No such device or address
  failed to read /dev/sdm7: No such device or address
  failed to read /dev/sr3: No such device or address

Kernel 3.2.9

Viele Gruesse!
Helmut

Re: looking for non existent devices

[Ilya Dryomov]

On Sat, Mar 17, 2012 at 10:32:00AM +0100, Helmut Hullen wrote:
> Hallo, linux-btrfs,
> 
> some commands still look for non existent devices.
> 
> I don't use "udev".
> When I run
> 
>         btrfs filesystem show
> 
> only the existent devices are shown - fine.
> 
> When I run
> 
>         btrfs filesystem label
> 
> or
> 
>         btrfs scrub status /dev/sdxn
> 
> then I get a lot of error messages with (p.e.)
> 
>   failed to read /dev/hda6: No such device or address
>   failed to read /dev/sdm7: No such device or address
>   failed to read /dev/sr3: No such device or address

Hi Helmut,

I think this has been fixed in recent btrfs-progs, commit 32eff711.
Could test with that commit present please ?  (You can get it from
dangerdonteveruse branch of Chris' btrfs-progs repo [1], the 'danger'
tag is irrelevant as long as you don't try to run fsck from that branch)

[1] git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git

Thanks,

		Ilya

Re: looking for non existent devices

[Helmut Hullen]

Hallo, Ilya,

Du meintest am 21.03.12:

>> When I run
>>
>>         btrfs filesystem label
>>
>> or
>>
>>         btrfs scrub status /dev/sdxn
>>
>> then I get a lot of error messages with (p.e.)
>>
>>   failed to read /dev/hda6: No such device or address
>>   failed to read /dev/sdm7: No such device or address
>>   failed to read /dev/sr3: No such device or address

> I think this has been fixed in recent btrfs-progs, commit 32eff711.

It is fixed in some (or many) places, it is not fixed everywhere. I had  
used kernel 3.2.9

Viele Gruesse!
Helmut

Re: looking for non existent devices

[Ilya Dryomov]

On Wed, Mar 21, 2012 at 07:24:00PM +0100, Helmut Hullen wrote:
> Hallo, Ilya,
> 
> Du meintest am 21.03.12:
> 
> >> When I run
> >>
> >>         btrfs filesystem label
> >>
> >> or
> >>
> >>         btrfs scrub status /dev/sdxn
> >>
> >> then I get a lot of error messages with (p.e.)
> >>
> >>   failed to read /dev/hda6: No such device or address
> >>   failed to read /dev/sdm7: No such device or address
> >>   failed to read /dev/sr3: No such device or address
> 
> > I think this has been fixed in recent btrfs-progs, commit 32eff711.
> 
> It is fixed in some (or many) places, it is not fixed everywhere. I had  
> used kernel 3.2.9

32eff711 is supposed to fix it in more places, filesystem label and
scrub status included.  This is purely a userspace issue, commit and
repo I pointed you to are for btrfs-progs, not the kernel.  You are
probably on branch master, it doesn't have that commit yet, only
dangerdonteveruse branch does.

Thanks,

		Ilya

Re: looking for non existent devices

[Helmut Hullen]

Hallo, Ilya,

Du meintest am 21.03.12:

>>> I think this has been fixed in recent btrfs-progs, commit 32eff711.

>> It is fixed in some (or many) places, it is not fixed everywhere. I
>> had used kernel 3.2.9

> 32eff711 is supposed to fix it in more places, filesystem label and
> scrub status included.  This is purely a userspace issue, commit and
> repo I pointed you to are for btrfs-progs, not the kernel.  You are
> probably on branch master, it doesn't have that commit yet, only
> dangerdonteveruse branch does.

Ok - I'll take a try. But it's not urgent ...

Viele Gruesse!
Helmut