[Ovirt-devel] iSCSI and disk timeouts

[Justin Clacherty]

  On 26/08/2010 6:00 PM, Justin Clacherty wrote:
>  Hi,
>
> I'm having a problem where one of the VM's I'm running appears to be 
> hanging.  I think what might be happening is that the disk is timing 
> out and being mounted read-only (or something like that).  The VM 
> image is on an iSCSI volume.
>
> What timeouts are set for iSCSI on the node?  I seem to recall it 
> being either 30 seconds or 2 minutes but I haven't been able to 
> confirm.  What timeouts are set for the hard drive within the VM?
>
> I'm wondering if it's not actually iSCSI that's the problem, but the 
> fact that the VM actually thinks it's a local hard disk.  Perhaps the 
> volume is taking a bit longer than normal to respond at times and 
> iSCSI deals with this but because the VM thinks it's a local hard 
> drive the timeouts are shorter so it returns an error and remounts 
> read-only.
>
> I've left the console to the VM logged in for now in the hopes of 
> catching an error message this time.

hmm, doesn't seem to print out anything on the console.  Anyone got info 
on the FS timeouts?

Cheers,
Justin.