[linux-lvm] LVM2-Snapshot

[linux-lvm] LVM2-Snapshot

[Christoph Pleger]

Hello,

I have problems when I try to create a snapshot of a logical volume
under LVM2 (Kernel 2.6.3). I get the following messages after using
"lvcreate -s -l 227 -n snap /dev/vg1/lv1":

device_mapper ioctl cmd 9 failed: Invalid argument
Couldn't load device 'vg1-snap'.
Problem reactivating origin lv1


How can I solve that?

Using google, I found that snapshots under LVM2 and Kernel 2.6 generally
do not work. I hope that that is no longer true, is it? 

Christoph

Re: [linux-lvm] LVM2-Snapshot

[darren.miller]

[-- Attachment #1: Type: text/plain, Size: 1379 bytes --]

I have exactly the same problem m8
==============================================================================
Darren Miller 
Senior Systems Support Engineer
Microsoft Certified Professional
SCO Advanced Certified Engineer 
Infomation Systems Department (Core Server Support)
Philips Semiconductors,Milbrook Industrial Estate,Southampton,SO15 
0DJ,England
Direct Dial In: +44 (0) 2380 312681









Christoph Pleger <Christoph.Pleger@uni-dortmund.de>
Sent by: 
linux-lvm-admin@redhat.com
10/03/2004 16:30
Please respond to linux-lvm

 
        To:     linux-lvm@redhat.com
        cc:     (bcc: Darren Miller/SOU/SC/PHILIPS)
        Subject:        [linux-lvm] LVM2-Snapshot
        Classification: 



Hello,

I have problems when I try to create a snapshot of a logical volume
under LVM2 (Kernel 2.6.3). I get the following messages after using
"lvcreate -s -l 227 -n snap /dev/vg1/lv1":

device_mapper ioctl cmd 9 failed: Invalid argument
Couldn't load device 'vg1-snap'.
Problem reactivating origin lv1


How can I solve that?

Using google, I found that snapshots under LVM2 and Kernel 2.6 generally
do not work. I hope that that is no longer true, is it? 

Christoph

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/



[-- Attachment #2: Type: text/html, Size: 2492 bytes --]

Re: [linux-lvm] LVM2-Snapshot

[Joe Thornber]

On Wed, Mar 10, 2004 at 05:30:02PM +0100, Christoph Pleger wrote:
> Hello,
> 
> I have problems when I try to create a snapshot of a logical volume
> under LVM2 (Kernel 2.6.3). I get the following messages after using
> "lvcreate -s -l 227 -n snap /dev/vg1/lv1":
> 
> device_mapper ioctl cmd 9 failed: Invalid argument
> Couldn't load device 'vg1-snap'.
> Problem reactivating origin lv1
> 
> 
> How can I solve that?
> 
> Using google, I found that snapshots under LVM2 and Kernel 2.6 generally
> do not work. I hope that that is no longer true, is it? 

The snapshot target isn't in vanilla 2.6 yet, use my udm (unstable dm)
tree if you want that functionality.

http://people.sistina.com/~thornber/dm/

I _hope_ to submit this to lkml within the next month.

- Joe

Re: [linux-lvm] LVM2-Snapshot

[darren.miller]

[-- Attachment #1: Type: text/plain, Size: 1865 bytes --]

Tried to apply the udm patch selection to vanilla 2.6.4 kernel recieved a 
shed load of failures and the kernel refused to build.  I am not a 
programmer so I have no clue how to rectify these issues.  do you have 
anything that works?
==============================================================================
Darren Miller 
Senior Systems Support Engineer
Microsoft Certified Professional
SCO Advanced Certified Engineer 
Infomation Systems Department (Core Server Support)
Philips Semiconductors,Milbrook Industrial Estate,Southampton,SO15 
0DJ,England
Direct Dial In: +44 (0) 2380 312681









Joe Thornber <thornber@redhat.com>
Sent by: 
linux-lvm-admin@redhat.com
11/03/2004 09:20
Please respond to linux-lvm

 
        To:     linux-lvm@redhat.com
        cc:     (bcc: Darren Miller/SOU/SC/PHILIPS)
        Subject:        Re: [linux-lvm] LVM2-Snapshot
        Classification: 



On Wed, Mar 10, 2004 at 05:30:02PM +0100, Christoph Pleger wrote:
> Hello,
> 
> I have problems when I try to create a snapshot of a logical volume
> under LVM2 (Kernel 2.6.3). I get the following messages after using
> "lvcreate -s -l 227 -n snap /dev/vg1/lv1":
> 
> device_mapper ioctl cmd 9 failed: Invalid argument
> Couldn't load device 'vg1-snap'.
> Problem reactivating origin lv1
> 
> 
> How can I solve that?
> 
> Using google, I found that snapshots under LVM2 and Kernel 2.6 generally
> do not work. I hope that that is no longer true, is it? 

The snapshot target isn't in vanilla 2.6 yet, use my udm (unstable dm)
tree if you want that functionality.

http://people.sistina.com/~thornber/dm/

I _hope_ to submit this to lkml within the next month.

- Joe

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/



[-- Attachment #2: Type: text/html, Size: 3062 bytes --]

Re: [linux-lvm] LVM2-Snapshot

[Joe Thornber]

On Thu, Mar 11, 2004 at 11:13:12AM +0000, darren.miller@philips.com wrote:
> Tried to apply the udm patch selection to vanilla 2.6.4 kernel recieved a 
> shed load of failures and the kernel refused to build.  I am not a 
> programmer so I have no clue how to rectify these issues.  do you have 
> anything that works?

The last udm was 2.6.4-rc2-udm1, I'm working on a 2.6.4 version now.
                       ^^^

- Joe

Re: [linux-lvm] LVM2-Snapshot

[Craig Ringer]

On Thu, 2004-03-11 at 17:20, Joe Thornber wrote:

> The snapshot target isn't in vanilla 2.6 yet, use my udm (unstable dm)
> tree if you want that functionality.
> 
> http://people.sistina.com/~thornber/dm/
> 
> I _hope_ to submit this to lkml within the next month.

Is there any chance to tweak lvm in the mean time, so that it doesn't
/try/ to take a snapshot? I was forced to reboot to recover access to an
LV after trying to take a snapshot. There was no indication that
snapshots are broken under 2.6 either - a note in the LVM README would
be really handy.

Most importantly, though, an informative error message would be
invaluable.

Craig Ringer

Re: [linux-lvm] LVM2-Snapshot

[darren.miller]

[-- Attachment #1: Type: text/plain, Size: 1982 bytes --]

>The snapshot target isn't in vanilla 2.6 yet, use my udm (unstable dm)
>tree if you want that functionality.
>
>http://people.sistina.com/~thornber/dm/
>
>I _hope_ to submit this to lkml within the next month.
>
>- Joe

Added patches 4, 5, 6, 7, 9, 10 & 11 compiles ok but

Patch 7 one hunk fails:

Hunk #6 FAILED at 911.
1 out of 6 hunks FAILED -- saving rejects to file drivers/md/dm.c.rej

Patch 9 one hunk fails:

Hunk #1 FAILED at 3.
1 out of 1 hunk FAILED -- saving rejects to file drivers/md/Makefile.rej

Patch 10 one hunk fails:

Hunk #1 FAILED at 3.
1 out of 1 hunk FAILED -- saving rejects to file drivers/md/Makefile.rej

Patch 11 two hunks fail:

Hunk #1 FAILED at 5.
Hunk #2 FAILED at 27.
2 out of 2 hunks FAILED -- saving rejects to file drivers/md/Makefile.rej

Adding patch 2 killed it completely:

drivers/md/dm.c: In function `dm_get_table':
drivers/md/dm.c:216: structure has no member named `map_lock'
drivers/md/dm.c:220: structure has no member named `map_lock'
drivers/md/dm.c: At top level:
make[2]: *** [drivers/md/dm.o] Error 1
make[1]: *** [drivers/md] Error 2
make: *** [drivers] Error 2

Patch 3 outright gets rejected

patching file drivers/md/dm.c 
Hunk #1 FAILED at 294.
1 out of 1 hunk FAILED -- saving rejects to file drivers/md/dm.c.rej

Patch 14 outright gets rejected

patching file drivers/md/Kconfig
Hunk #1 FAILED at 199.
1 out of 1 hunk FAILED -- saving rejects to file drivers/md/Kconfig.rej
patching file drivers/md/Makefile
Hunk #1 FAILED at 30.
1 out of 1 hunk FAILED -- saving rejects to file drivers/md/Makefile.rej
patching file drivers/md/dm-zero.c

Advice needed please

==============================================================================
Darren Miller 
Senior Systems Support Engineer
Microsoft Certified Professional
SCO Advanced Certified Engineer 
Infomation Systems Department (Core Server Support)
Philips Semiconductors,Milbrook Industrial Estate,Southampton,SO15 
0DJ,England
Direct Dial In: +44 (0) 2380 312681

[-- Attachment #2: Type: text/html, Size: 3854 bytes --]

Re: [linux-lvm] LVM2-Snapshot

[darren.miller]

[-- Attachment #1: Type: text/plain, Size: 726 bytes --]

>The last udm was 2.6.4-rc2-udm1, I'm working on a 2.6.4 version now.
>                       ^^^
>
>- Joe

Ahh I see, I couldn't get hold of the rc2 simply wasn't available for 
download.  well my last mail may be of some use?  gave you what I am 
seeing error wise with the current udm

Anyway snapshot don't error any more the lvcreate -s commands just hang 

Daz
==============================================================================
Darren Miller 
Senior Systems Support Engineer
Microsoft Certified Professional
SCO Advanced Certified Engineer 
Infomation Systems Department (Core Server Support)
Philips Semiconductors,Milbrook Industrial Estate,Southampton,SO15 
0DJ,England
Direct Dial In: +44 (0) 2380 312681

[-- Attachment #2: Type: text/html, Size: 1192 bytes --]

Re: [linux-lvm] LVM2-Snapshot

[Alasdair G Kergon]

On Thu, Mar 11, 2004 at 08:24:05PM +0800, Craig Ringer wrote:
> Is there any chance to tweak lvm in the mean time, so that it doesn't
> /try/ to take a snapshot? 

Yes, I'm working on this.

I'll update the installation documentation to refer to the information
about upgrading recently added to the HOWTO:

  http://www.tldp.org/HOWTO/LVM-HOWTO/lvm2faq.html

Alasdair
-- 
agk@redhat.com

Re: [linux-lvm] LVM2-Snapshot

[darren.miller]

[-- Attachment #1: Type: text/plain, Size: 1678 bytes --]

Will the patches be released in vanilla 2.6.5?


==============================================================================
Darren Miller 
Senior Systems Support Engineer
Microsoft Certified Professional
SCO Advanced Certified Engineer 
Infomation Systems Department (Core Server Support)
Philips Semiconductors,Milbrook Industrial Estate,Southampton,SO15 
0DJ,England
Direct Dial In: +44 (0) 2380 312681









Joe Thornber <thornber@redhat.com>
Sent by: 
linux-lvm-admin@redhat.com
11/03/2004 09:20
Please respond to linux-lvm

 
        To:     linux-lvm@redhat.com
        cc:     (bcc: Darren Miller/SOU/SC/PHILIPS)
        Subject:        Re: [linux-lvm] LVM2-Snapshot
        Classification: 



On Wed, Mar 10, 2004 at 05:30:02PM +0100, Christoph Pleger wrote:
> Hello,
> 
> I have problems when I try to create a snapshot of a logical volume
> under LVM2 (Kernel 2.6.3). I get the following messages after using
> "lvcreate -s -l 227 -n snap /dev/vg1/lv1":
> 
> device_mapper ioctl cmd 9 failed: Invalid argument
> Couldn't load device 'vg1-snap'.
> Problem reactivating origin lv1
> 
> 
> How can I solve that?
> 
> Using google, I found that snapshots under LVM2 and Kernel 2.6 generally
> do not work. I hope that that is no longer true, is it? 

The snapshot target isn't in vanilla 2.6 yet, use my udm (unstable dm)
tree if you want that functionality.

http://people.sistina.com/~thornber/dm/

I _hope_ to submit this to lkml within the next month.

- Joe

_______________________________________________
linux-lvm mailing list
linux-lvm@redhat.com
https://www.redhat.com/mailman/listinfo/linux-lvm
read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/



[-- Attachment #2: Type: text/html, Size: 2914 bytes --]