I do not think there is any relation between I/O errors and system device discovery. The thing to understand is what events are happening in your SAN which result in I/O errors. Are you doing anything or causing any events or the errors are happening on their own. If they are happening on their own then what is the frequency of the errors (is there any relation to the load e.g. the error happens 3 min. after the 1st I/O).
Also which driver is generating I/O errors ? (perhaps a clipping of / var/adm/messages will help). And what is the system configuration ? i.e. OS level, SAN patch level, 3rd party software, HBA, switch etc ? Sumit On Oct 28, 2007, at 10:55 AM, Tom De Boeser wrote: > Hi, > For the last 5 years we've been running a fairly large enterprise > backup system with HP's Data Protector on a HPUX system. The > backups mostly happen via SAN, and in the beginning we had a lot of > issues with "I/O Errors". These were due to hosts with device > monitors on ( compaq insight manager, HPUX RaidMON, etc. ). > Since then it's been smooth sailing. > > Well, it was time for a new server so we picked a Sun v445. > Beautiful box, but of course we have issues, the "I/O Errors" are > back. I know devfsadmd looks for new devices, but killing it > didn't seem to help, docs pointed me to /kernel/drv/fp.conf and > manual_configuration_only=1 might help, but enabling that create a > problem getting an SAN disk to mount. > > So my question, what can be disabled to stop the system from > "discovering/probing" for new devices? Or even better, is there > something else I'm missing? > > Thanks, > > Tom de > > > This message posted from opensolaris.org > _______________________________________________ > storage-discuss mailing list > [email protected] > http://mail.opensolaris.org/mailman/listinfo/storage-discuss _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
