cannot mount LUNs

[Don Peterson]

I am having an issue with one of my PowerEdge 6650's running RedHat 2.1
It froze last night and I had to hard boot it; since then it will not mount any LUNs on our CX700.
I see the following errors if I do a dmesg:

Attached scsi disk sdf at scsi3, channel 0, id 1, lun 0
sdf : READ CAPACITY failed.
sdf : status = 1, message = 00, host = 0, driver = 08
Current sd00:00: sense key Illegal Request
Additional sense indicates Logical unit not supported
sdf : block size assumed to be 512 bytes, disk size 1GB.
 sdf: I/O error: dev 08:50, sector 0
 unable to read partition table

It will list this for 5 or 6 disks, and if I try to fdisk one of them I get the error unable to read /dev/sd*
Nothing has changed as far as zoning on the switches or configuration with the SAN.
I can do a navicli -h 172.20.0.57 getlun and see all the LUNs on the SAN.
Navisphere shows the host registered and logged in .
My other hosts are fine, they are not having any issues connecting to the SAN.
Any suggestions are appreciated...

Thanks,
Don

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