Infrastructure Software

I am getting the following mesg. in /var/adm/messages. What could be the problem?? (M/C E250, OS - 2.6)
May 27 23:11:09 sun2000 unix: sf0: sf_cmd_callback: Lost Frame (read) received 0x8 expected 0x1f4 target 0x1^M May 27 23:11:09 sun2000 unix: WARNING: /sbus@2,0/SUNW,socal@d,10000/sf@0,0/ssd@w50020f2300008fd0,0 (ssd0):^M^M May 27 23:11:09 sun2000 unix: SCSI transport failed: reason 'incomplete': retrying command^M^M May 27 23:11:09 sun2000 unix: sf0: sf_cmd_callback: Lost Frame (read) received 0x8 expected 0x1f4 target 0x1^M May 27 23:11:10 sun2000 last message repeated 2 times May 27 23:11:10 sun2000 unix: WARNING: /sbus@2,0/SUNW,socal@d,10000/sf@0,0/ssd@w50020f2300008fd0,0 (ssd0):^M^M May 27 23:11:10 sun2000 unix: disk not responding to selection^M^M May 27 23:11:10 sun2000 unix: sf2: sf_cmd_callback: Lost Frame (read) received 0x8 expected 0x1f4 target 0x1^M May 27 23:11:10 sun2000 unix: WARNING: /sbus@6,0/SUNW,socal@d,10000/sf@0,0/ssd@w50020f2300004fb6,0 (ssd1):^M^M May 27 23:11:10 sun2000 unix: SCSI transport failed: reason 'incomplete': retrying command^M^M May 27 23:11:10 sun2000 unix: sf2: sf_cmd_callback: Lost Frame (read) received 0x8 expected 0x1f4 target 0x1^M May 27 23:11:10 sun2000 last message repeated 2 times May 27 23:11:10 sun2000 unix: WARNING: /sbus@6,0/SUNW,socal@d,10000/sf@0,0/ssd@w50020f2300004fb6,0 (ssd1):^M^M May 27 23:11:10 sun2000 unix: disk not responding to selection^M^M May 28 01:48:30 sun2000 unix: NOTICE: msgcnt 58 vxfs: mesg 001: vx_nospace - /dev/vx/dsk/view2dg3/sync-4 file system full (1 block extent)

Thanks Karthik