iostat -En,有高手能解释一下Soft Errors，Hard Errors和Transport Errors吗

insiderys

执行iostat -En后能够看到硬盘的统计信息，其中就有Soft Errors，Hard Errors和Transport Errors。
有没有高手能解释一下，这三种error是什么意思，哪些情况会导致他们不为0。谢谢！

nimysun

In most case, "Transport Errors"  means that one read/write command can not be returned with  data. the data was lost on the way to disk. It is possible that the disk is not firmly connected to disk slot or some external disk cable has some problem.  After several Transport Errors were reported, the disk will be kicked off by solaris.
"Hard Error" means that once one read/write command was released, the disk returned one error to system. It is very possible that the disk itself was really defective.

insiderys

感谢楼上，soft error还有谁能解释一下吗？