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- IBM Dealers' Hotline Problem # DLE-850009
- -----------------------------------------
-
- This problem occurs when using DOS 3.1 on a non-AT (ie AT intelligent
- controller) with a hard disk. It is relatively rare, but if conditions
- are right, let's hope that you just backed up your hard disk. If you
- haven't, you'll wish that you had!
-
-
- The problem is as follows:
-
- Whenever a disk drive that is not on an AT disk controller card has an error
- that goes through ECC (Error Correction Code) under DOS 3.1, the data on that
- disk is garbled on all subsequent sectors. This problem occurs on all non-AT
- systems, including IBM's XT (with the IBM disk controller).
-
- One example (I am told) of this type of error is a DMA boundry error.
- Apparently, these errors are not too common, but certain code is able to force
- this error 100% of the time and thus demonstrate the problem. To keep it from
- being misused by the less responsible among us, that code should not be
- published.
-
- Because of this problem, I am not installing DOS 3.1 until IBM has a
- fix....
-