Chapter 5 Troubleshooting
A500: SDLT Hard Read Error
202 SuperLoader User’s Guide
Table 30 Hard Read
Error/Hard Write Error
Field Descriptions
Cause 5 This error could be due to one or more of the following:
• A bad spot on the media
• A failure of the drive to determine the data read from the tape was
good due to bad CRC
• Other indicators used by the drive to insure data integrity
• The data originally written was not written correctly
Field Description
Media ID Random number used to identify tapes
Physical Block
Number (PBN)
Physical block location where the error occurred. There is one
physical block for each read/write head on each track. For example,
if there are 4 separate heads and 10 tracks, there would be
40 physical blocks on a single point of that media.
Tape Address Location on tape in inches
Track Number Track number where error occurred
Retry Count Retry count used when reading
Logical Block Number
(LBN)
A block of data on media that includes all physical block associated
with all heads for that single point of media. For example, in the
forward direction if there are 4 heads and 10 tracks 5 forward and
5 backwards, there would be two logical block going backwards. Yet
these two logical blocks would equate to 10 physical blocks.
Head Wear Hours Number of Head Wear Hours for the SDLT Head reported by Servo
BBC Head Wear Hours Number of head Wear Hours for the BRC Head reported by Servo
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