I'm running a FreeBSD 10.1-RELEASE-p19 on a VPS (VMware).
My ISP is experience a rapid data growth, and these messages spontaneous started to show up in our logs a week ago.
Sep 25 09:00:50 srv03 kernel: (da0:mpt0:0:0:0): SCSI status: Busy
Sep 25 09:00:50 srv03 kernel: (da0:mpt0:0:0:0): Retrying command
Sep 25 09:00:50 srv03 kernel: (da0:mpt0:0:0:0): WRITE(10). CDB: 2a 00 03 f9 6c 22 00 00 40 00
Sep 25 09:00:50 srv03 kernel: (da0:mpt0:0:0:0): CAM status: SCSI Status Error
Sometimes the server is totally losing contact with the storage, and then panic and restarts. This often occur every even hour, presumably by a routine job (migration/backup).
Until my ISP have added more storage system, that will lower the load on the storage, I really want to try do something.
I have found this, but are unsure how to patch/use the information: https://svnweb.freebsd.org/base?view=revision&revision=278111
I also found this (vfs.unmapped_buf_allowed=0
), but I'm unsure if this could be related?
https://www.freebsd.org/releases/10.1R/errata.html#open-issues
camcontrol tags da0 -v
(pass1:mpt0:0:0:0): dev_openings 127
(pass1:mpt0:0:0:0): dev_active 0
(pass1:mpt0:0:0:0): devq_openings 127
(pass1:mpt0:0:0:0): devq_queued 0
(pass1:mpt0:0:0:0): held -1
(pass1:mpt0:0:0:0): mintags 2
(pass1:mpt0:0:0:0): maxtags 255
Any thoughts, hints, ideas would be really really really appreciated.
Thanks!