Kernel Error & I/O error message

["Reuben D. Budiardja" <techlist voyager phys utk edu>]

Hi,
Hope someone can help me interpret this. I got this message in the logwatch of 
machine running RHEL 3 this morning. Does this mean my first SCSI this (ie. 
SDA) is about to fail, or is this more of a kernel bug? Basically my question 
is, is this more likely hardware problem (scsi drive itself) or software 
problem (kernel) ? 
Thanks for any help.

WARNING:  Kernel Errors Present
    I/O error: dev 08:21, sect...:  4Time(s)
   Info fld=0x153174, Current sd08:21: sense key Hardware Error...:  2Time(s)
   Info fld=0x154936, Current sd08:21: sense key Hardware Error...:  1Time(s)
   Info fld=0x1b3b6, Current sd08:21: sense key Hardware Error...:  1Time(s)
   SCSI disk error : host 0 channel...:  4Time(s)

RDB
-- 
Reuben D. Budiardja
Department of Physics and Astronomy
The University of Tennessee, Knoxville, TN
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