HP C737990900 - Manual (Page 98)

98 Commands
Note Early warning end of medium information is not reported on
reads.
Residue Information:
The Valid bit will be set. The information bytes will be as follows:
Failure to read data
through media
error or non-fatal
drive error
CHECK
COND’N
MEDIUM
ERROR
Additional sense is set to 1100h (unrecovered read error) or 3B00h
(sequential positioning error). Residue information is as described
below.
Corrupt data
format
CHECK
COND’N
MEDIUM
ERROR
Additional sense set to 3002h (can’t read media).
Blank media
encountered during
a read
CHECK
COND’N
BLANK
CHECK
Caused by an attempt to read an unformatted tape. Additional sense is
set to 5000h (EOD not found). Residue information is as shown below.
Event Status Key Notes
Variable Block Mode The requested transfer length (in bytes).
Fixed Block Mode The difference (in blocks) between the requested transfer size and the actual number of
blocks transferred. A partially transferred block is not counted, so for example, if 3.5
out of 10 blocks have been transferred the residue will be 7.
If the last block is an illegal length block, it is not counted among those transferred. For
example, if 4 legal length blocks and 1 illegal length block have been transferred out
of a total of 10, the residue will be 6.