On 05/08/09 07:15, Mike Gerdts wrote: > I have a T5120 with: > > - Primary domain running snv112 + LDoms Manager 1.1 + firmware 7.2.0 > - Many guest LDoms running S10u6 or S10u7 > > One of the guest LDoms keeps getting stuck in biowait trying to do I/O > to a root vdisk (SVM mirror at the guest level). These LDoms were > previously on a T2000 running snv99 in the primary LDom and had no > problems. For a while the problematic guest would have hours to days > of runtime before hanging. Now I'm lucky if I can get to a root shell > after booting. > > Presumably I can use mdb and/or scat in the primary and guest LDoms to > see where the messaging is getting hung up. Unfortunately I don't > know what I should be looking for. Are there any tricks of the trade > that you can share with me?
There's no simple recipe to analyze a vdisk hang. I would suggest that you first check that there's no obsvious vdc/vds messages in the /var/adm/messages files. The most frequent problem is that the vdisk backend is not accessible. Otherwise you would have to look at some kernel structures (such as vdc_t and vds_t from vdc_state/vds_state) but that's not simple. alex.
