[linux-lvm] snapshots & reiserfs

[linux-lvm] snapshots & reiserfs

[James Pattinson]

Hi

Im sure this is a FAQ but I can't find it.

I want to be able to use snapshots on my beta8 / reiserfs (stock 2.5.7)
system. I can create a snapshot OK, but when I try to mount it I get an
error saying we can't replay the logs since we are mounted read only.

Also, i've just noticed this in my dmesg:

lvm -- _pv_get_number failed for rdev = 0
lvm -- giving up to snapshot /dev/vg00/lvol6 on /dev/vg00/greebo_snap:
couldn't prepare kiovec blocks (start probably isn't block aligned)
lvm - lvm_map: ll_rw_blk for inactive LV /dev/vg00/greebo_snap
lvm - lvm_map: ll_rw_blk for inactive LV /dev/vg00/greebo_snap
read_super_block: unable to read superblock on dev 3a:0f
read_old_super_block: try to find super block in old location
lvm - lvm_map: ll_rw_blk for inactive LV /dev/vg00/greebo_snap
read_old_super_block: unable to read superblock on dev 3a:0f
lvm - lvm_map: ll_rw_blk for inactive LV /dev/vg00/greebo_snap
FAT bread failed

Any ideas? snapshots seem really cool, and i want to play :)

James

Re: [linux-lvm] snapshots & reiserfs

[AJ Lewis]

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On Fri, Jul 27, 2001 at 05:31:38PM +0100, James Pattinson wrote:
> Im sure this is a FAQ but I can't find it.
> 
> I want to be able to use snapshots on my beta8 / reiserfs (stock 2.5.7)
> system. I can create a snapshot OK, but when I try to mount it I get an
> error saying we can't replay the logs since we are mounted read only.

<-snip->
 
> Any ideas? snapshots seem really cool, and i want to play :)

You need to make sure you apply the linux-2.4.x-VFS-lock.patch, and also
apply this:

--------
diff -Nru a/fs/reiserfs/super.c b/fs/reiserfs/super.c
--- a/fs/reiserfs/super.c       Sun Apr 29 20:44:38 2001
+++ b/fs/reiserfs/super.c       Sun Apr 29 20:44:38 2001
@@ -80,7 +80,7 @@
     reiserfs_prepare_for_journal(s, SB_BUFFER_WITH_SB(s), 1);
     journal_mark_dirty(&th, s, SB_BUFFER_WITH_SB (s));
     reiserfs_block_writes(&th) ;
-    journal_end(&th, s, 1) ;
+    journal_end_sync(&th, s, 1) ;
   }
   s->s_dirt = dirty;
   unlock_kernel() ;
--------

Apply the patches in this order:
 - LVM Beta8 patch
 - VFS-lock patch
 - the patch included in this email

Regards,
-- 
AJ Lewis
Sistina Software Inc.                  Voice:  612-638-0500
1313 5th St SE, Suite 111              Fax:    612-638-0500
Minneapolis, MN 55414                  E-Mail: lewis@sistina.com
http://www.sistina.com

Current GPG fingerprint = 3B5F 6011 5216 76A5 2F6B  52A0 941E 1261 0029 2648
Get my key at: http://www.sistina.com/~lewis/gpgkey
 (Unfortunately, the PKS-type keyservers do not work with multiple sub-keys)

-----Begin Obligatory Humorous Quote----------------------------------------
VI VI VI The editor of the beast.
-----End Obligatory Humorous Quote------------------------------------------

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Re: [linux-lvm] snapshots & reiserfs

[Mark Bainter]

AJ Lewis [lewis@sistina.com] wrote:
> You need to make sure you apply the linux-2.4.x-VFS-lock.patch, and also
> apply this:
> 
[snip]
> 
> Apply the patches in this order:
>  - LVM Beta8 patch
>  - VFS-lock patch
>  - the patch included in this email
> 
> Regards,

Hrm.  Do you have to be running LVM Beta8, or can those two patches
be used with the current kernel version?  (.9.0 I think?)

Re: [linux-lvm] snapshots & reiserfs

[AJ Lewis]

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On Fri, Jul 27, 2001 at 12:57:50PM -0500, Mark Bainter wrote:
> AJ Lewis [lewis@sistina.com] wrote:
> > You need to make sure you apply the linux-2.4.x-VFS-lock.patch, and also
> > apply this:
> > 
> [snip]
> > 
> > Apply the patches in this order:
> >  - LVM Beta8 patch
> >  - VFS-lock patch
> >  - the patch included in this email
> > 
> > Regards,
> 
> Hrm.  Do you have to be running LVM Beta8, or can those two patches
> be used with the current kernel version?  (.9.0 I think?)

I don't know.  The current kernel version is rather broken AFAIK, so I
really can't recommend using it.  We're working on getting the latest stuff
into the kernel, but it is *very* slow going.

Regards,
-- 
AJ Lewis
Sistina Software Inc.                  Voice:  612-638-0500
1313 5th St SE, Suite 111              Fax:    612-638-0500
Minneapolis, MN 55414                  E-Mail: lewis@sistina.com
http://www.sistina.com

Current GPG fingerprint = 3B5F 6011 5216 76A5 2F6B  52A0 941E 1261 0029 2648
Get my key at: http://www.sistina.com/~lewis/gpgkey
 (Unfortunately, the PKS-type keyservers do not work with multiple sub-keys)

-----Begin Obligatory Humorous Quote----------------------------------------
Chaos, panic, pandemonium - my work here is done
-----End Obligatory Humorous Quote------------------------------------------

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[linux-lvm] AJ's postings

[Jim Cromie]

AJ Lewis wrote:


> On Fri, Jul 27, 2001 at 12:57:50PM -0500, Mark Bainter wrote:
> > AJ Lewis [lewis@sistina.com] wrote:
> > > You need to make sure you apply the linux-2.4.x-VFS-lock.patch, and also
> > > apply this:
> > >
> > [snip]

sorry to bring the level-of-discourse down, but..

AJ,

all your recent postings (that I still have, back to last thurs)  are all in
attachements - no body.
I cant get netscape messenger to actually do inline-format, at least for your
text/plain attachment.

I can read it either by;
a- replying-to  ( seems to inline properly )
b-  grab attachement pane, right-click attachment, select open

its probably just me, but if theres some attachment options at your disposal,
Id appreciate it.

tia,
jimc

Re: [linux-lvm] AJ's postings

[Eric M. Hopper]

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On Fri, Jul 27, 2001 at 02:25:15PM -0600, Jim Cromie wrote:
> 
> all your recent postings (that I still have, back to last thurs)  are all in
> attachements - no body.
> I cant get netscape messenger to actually do inline-format, at least for your
> text/plain attachment.
> 
> I can read it either by;
> a- replying-to  ( seems to inline properly )
> b-  grab attachement pane, right-click attachment, select open
> 
> its probably just me, but if theres some attachment options at your disposal,
> Id appreciate it.

	It's because he's using multipart/signed and cryptographically
signing all of his messages.  Many mailers do brain damaged things with
multipart/signed.  Some support it, and for those ones, it's really the
only way to go for signed messages.

Have fun (if at all possible),
-- 
"It does me no injury for my neighbor to say there are twenty gods or no God.
It neither picks my pocket nor breaks my leg."  --- Thomas Jefferson
"Go to Heaven for the climate, Hell for the company."  -- Mark Twain
-- Eric Hopper (hopper@omnifarious.org  http://www.omnifarious.org/~hopper) --

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Re: [linux-lvm] AJ's postings

[Michael Tokarev]

I use netscape too (look to headers of this my mail), and
it displays his mails (and many other mails with digital
signatures) just like all other normal text/plain messages.
It only shows one little attachtment at the end, of type
application/pgp-signature, that it doesn't understand.
So it is something wrong with your netscape...

Regards,
 Michael.

Jim Cromie wrote:
> 
> AJ Lewis wrote:
> 
> > On Fri, Jul 27, 2001 at 12:57:50PM -0500, Mark Bainter wrote:
> > > AJ Lewis [lewis@sistina.com] wrote:
> > > > You need to make sure you apply the linux-2.4.x-VFS-lock.patch, and also
> > > > apply this:
> > > >
> > > [snip]
> 
> sorry to bring the level-of-discourse down, but..
> 
> AJ,
> 
> all your recent postings (that I still have, back to last thurs)  are all in
> attachements - no body.
> I cant get netscape messenger to actually do inline-format, at least for your
> text/plain attachment.
> 
> I can read it either by;
> a- replying-to  ( seems to inline properly )
> b-  grab attachement pane, right-click attachment, select open
> 
> its probably just me, but if theres some attachment options at your disposal,
> Id appreciate it.
> 
> tia,
> jimc