[DRBD-user] Freezing DRBD and freezing disks...

[Stefan Löfgren]

Well, hi again...
Funny, it looks like this was the CDROM and not the HDD...
I've put a cd into it and the messages are now gone...
Obviusly not connected to DRBD (puh)...
It's been a day and no messages (instead of 10 occations)...

Thanks anyway...

/Stefan


---------- Original Message -----------
From: "Stefan Löfgren" <stlo at dontdownload.com>
To: drbd-user at linbit.com
Sent: Mon, 19 May 2008 15:56:54 +0200
Subject: [DRBD-user] Freezing DRBD and freezing disks...

> Hi all!
> 
> Background:
> I've only been using DRBD for a couple of weeks in test
> and now for 1 week in "production"...
> 
> My testsystem was kernel 2.4.3.33 and DRBD 0.7.25 in
> virtual machines and seems to be working just fine...
> 
> Moving on to production-machines (DELL PowerEdge R200) gave
> me a lot of problems and had to go for Slackware 12.1,
> kernel 2.6.24.5 and DRBD 8.2.5.
> Here starts the problem:
> 
> DRBD gets stuck in Bitmap-transfer after 15 minutes and freezes
> the complete resource, and a disconnect is needed. I fixed this
> with using 8.2.6rc1 and now the resource is now working.
> 
> Now, the next problem. Freezing ATA disks instead.
> This might have been a problem before the update but
> was pretty hard to find behind the freezing resource...
> 
> May 19 13:55:36 mother2 kernel: ata1.01: exception Emask 0x0 SAct 
> 0x0 SErr 0x0 action 0x2 frozen
> May 19 13:55:36 mother2 kernel: ata1.01: cmd
> a0/00:00:00:08:00/00:00:00:00:00/b0 tag 0 pio 8 in
> May 19 13:55:36 mother2 kernel:          cdb 25 00 00 00 00 00 00 00 
>  00 00 00 00 00 00 00 00
> May 19 13:55:36 mother2 kernel:          res
> 40/00:03:00:08:00/00:00:00:00:00/b0 Emask 0x4 (timeout)
> May 19 13:55:36 mother2 kernel: ata1.01: status: { DRDY }
> 
> This first looked like a problem with the hardware 'cos there was 
> no messages like this on the secondary node. So, switching primary...
> Now, there is no messages like this on that machine but suddenly
> there's a lot of messages on the new primary...
> 
> This rules out a hardware problem, right? (no errors on secondary, 
> even if a copy a lot of files on the other filesystems on the same 
> physical disk).
> 
> Anyone seen this before? Known issues?
> Should I go back to DRBD 8.0.x? (disk-compatible?)
> I've tried to different SATA controllers with the same result.
> No problems on the secondary node.
> I'm running the resource on raid1 (/dev/md0) on both machines...
> Any other ideas?
> 
> Thanks in advance...
> 
> /Stefan
> 
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------- End of Original Message -------