Solaris - scsi: Device is gone???

[Robert La Ferla]

We have a Sun T2000 that has been giving us this error every a couple of months or so.  It's not always the same disk target that has the problem.  It happened on two different targets (one that is RAID'ed and one that is not)  We do not believe it's actually a bad disk.  I found this old post but nothing helped:  http://www.unix.com/solaris/96147-solaris-disk-error.html   Ideas???

SunOS t2000 5.10 Generic_127127-11 sun4v sparc SUNW,Sun-Fire-T200

Jun 25 19:04:01 t2000 scsi: [ID 365881 kern.info] /pci at 780/pci at 0/pci at 9/scsi at 0 (mpt0):
Jun 25 19:04:01 t2000      Log info 3101000c received for target 1.
Jun 25 19:04:01 t2000      scsi_status=0, ioc_status=8043, scsi_state=0
Jun 25 19:04:01 t2000 scsi: [ID 107833 kern.notice]        Device is gone
Jun 25 19:04:01 t2000 md_stripe: [ID 641072 kern.warning] WARNING: md: d10: write error on /dev/dsk/c0t1d0s6