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

[Michael Gregg <mgregg@xxxxxxxxxxxxxxxx>]

On Mon, 2005-10-31 at 13:30 -0800, Michael Gregg wrote:
> 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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> http://lists.xensource.com/xen-users

So, I figured out my own problem. 

I had a typo in my xen configuration file:

To set up the disks I used:
disk = ['phy:vg/mg-gws_data,sda1,w' ,'phy:vg/mg-gws_swap,sda2,2']
notice the "2"------------------------------------------------^

it should have been "w"
disk = ['phy:vg/mg-gws_data,sda1,w' ,'phy:vg/mg-gws_swap,sda2,w']
--------------------------------------------------------------^



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