On 7/29/2005 9:42 AM, Bruce Black wrote:
As I understand, the complement to Format Write is READ TRACK
which will read all the data on the track, counts, keys, and
data blocks. If the rest of the track isn't physically
erased then I would have thought READ TRACK would find it.
(Not actually getting out any manuals right now.)
Nope. Any format write (even writing an EOF, which has zero data
length), makes all existing data beyond that point unavailable. this is
true irregardless of whether the vendor's hardware physically overwrites
the data or not. Logically the records are no longer available.
I hadn't realized that writing an EOF was a format-write. Thanks to
Bruce and Bill for improving my knowledge.
Walt
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