question about iostat output.

[spamgrab at charter.net]

Group, 

  I'm wondering if there's a technical discussion someplace about the output generated by the " iostat -En | grep rmt " ;

rmt/0           Soft Errors: 4 Hard Errors: 1 Transport Errors: 0
rmt/1           Soft Errors: 6 Hard Errors: 0 Transport Errors: 0
rmt/2           Soft Errors: 4 Hard Errors: 0 Transport Errors: 0
rmt/3           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
rmt/4           Soft Errors: 9 Hard Errors: 115 Transport Errors: 0
rmt/5           Soft Errors: 2 Hard Errors: 1 Transport Errors: 112
rmt/6           Soft Errors: 10 Hard Errors: 1 Transport Errors: 0
rmt/7           Soft Errors: 0 Hard Errors: 1 Transport Errors: 0
rmt/8           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
rmt/9           Soft Errors: 0 Hard Errors: 2 Transport Errors: 0
rmt/10          Soft Errors: 4 Hard Errors: 0 Transport Errors: 0
rmt/11          Soft Errors: 0 Hard Errors: 0 Transport Errors: 0


The question is, what is the difference between the types of listed errors?   Also, what's considered an "acceptable" count for these errors over a given period of time?

Thanks!