Re: [Xen-users] problem accessing swap partition on a xen machines

["Dirk H. Schulz" <dirk.schulz@xxxxxxxxxxxxx>]

Hi Gregg,

did you have a look if swap space is used during your dd run?

If it is not in use, then the question is, if the problem is restricted 
to swap space? Did you test your other lvm (it's lvm, isn't it?) volumes 
as well?
Dirk

Michael Gregg schrieb:

> I'm using debian stable with a recompiled xen dom0 kernel. 
>
> running debian on any domu.
>
> My partitions are drives created with lwm.
>
> I'm having problems with my swap partiton getting corrupted. When I get
> the problem, if I pull the data from the swap with dd and get errors. If
> I wait a few minutes, the problems go away.
>
> Has anybody seen this? Does anybody have any idea on howto solve this?
> Please ask questions if you need more information.
>
> problem observed:
> mg-gws:~# dd if=/dev/sda2 of=/dev/null
> end_request: I/O error, dev sda2, sector 5080
> end_request: I/O error, dev sda2, sector 5120
> end_request: I/O error, dev sda2, sector 5208
> end_request: I/O error, dev sda2, sector 5296
> end_request: I/O error, dev sda2, sector 5384
> end_request: I/O error, dev sda2, sector 5392
> end_request: I/O error, dev sda2, sector 5424
> end_request: I/O error, dev sda2, sector 5464
> end_request: I/O error, dev sda2, sector 5552
> end_request: I/O error, dev sda2, sector 5640
> 2097152+0 records in
> 2097152+0 records out
> 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec)
>
> 1 minute after problem. 
> mg-gws:~# dd if=/dev/sda2 of=/dev/null
> 2097152+0 records in
> 2097152+0 records out
> 1073741824 bytes transferred in 10.769949 seconds (99697949 bytes/sec)
>
> My xen config is as follows:
>
> # Creator: michael gregg
> # Creation Date: Wed Oct 26 11:51:54 PDT 2005
> # contact email: mgregg -at- propel.com
> # created with: CreateXenVm mg-gws 192 michael gregg
> #
> vif  = ['mac=42:42:00:80:01:92']
> interface = "eth0"
> memory = 128
> name = "mg-gws"
> kernel = "/boot/xen-linux-2.6.11-ocxenu"
> disk = ['phy:vg/mg-gws_data,sda1,w' ,'phy:vg/mg-gws_swap,sda2,2']
> root = "/dev/sda1"
> # assigned IP Address: 172.16.80.192
>
>
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> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
>  

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