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Troubleshooting
Troubleshooting Devices and Media
Chapter 12 577
• Log sense write report for LTO devices - total data sets processed.
Media ID from tape=0fa003bd:3e0057e6:05b7:0001; Medium Label=
ULT2; Logical drive=ultrium1; Errors corrected no delay= 0;
Errors corrected delay= 0; Total= 0;Total errors corrected= 0;
Total correction algorithm processed= 0; Total bytes processed=
47246; Total uncorrected errors= 0
One data set is 404352 bytes. To calculate the amount of total bytes
processed, use the following formula:
47246 data sets * 404352 bytes = 19104014592 bytes after
compression a full tape).
• Log sense write report for DDS devices - total groups processed.
Media ID from tape= 0fa0049f:3df881e9:41f3:0001; Medium Label=
Default DDS_5; Logical drive= DDS; Errors corrected no delay=
-1; Errors corrected delay= -1; Total= -1; Total errors
corrected= 0; Total correction algorithm processed= 154; Total
bytes processed= 2244; Total uncorrected errors= 0
DDS1/2: One group is 126632 bytes
DDS3/4: One group is 384296 bytes
To calculate the amount of total bytes processed, use the following
formula:
2244 groups * 126632 bytes = 284162208 bytes after compression
(a 359 MB backup on DDS2).
359 MB of data was backed up, resulting in 271 MB of native data on
tape.
Medium Header Sanity Check
Data Protector performs a medium header sanity check before a medium
is ejected from a drive to validate the medium header.
The medium header sanity check is enabled by default. The global
variable can be set by uncommenting the following line in the Global
Options file: Ob2HeaderCheck=1.
Problem In case the medium header sanity check detects any header consistency
errors on the medium, an error message is displayed and all the objects
on the medium are marked as failed.
If the medium header is corrupt, all objects on the affected medium are
marked as failed and the medium state is marked as poor.