User manual

SANtools® S.M.A.R.T. Disk Monitor (SMARTMon-UX)146
SANTOOLS® is registered in US Patent and Trademark Office No 3,107,854 All rights reserved.
Write delay time (in 100ms) : 0, 0, 0
Data buffer recovery (DBR) : 0, 0, 0 {R/O}
Block identifiers supported (BIS) : 1, 1, 1 {R/O}
Report setmarks (RSMK) : 1, 1, 1 {R/O}
Automatic velocity control (AVC) : 0, 1, 1
Stop on consecutive filemarks (SOCF) : 0, 0, 0 {R/O}
Recover buffer over (RBO) : 0, 0, 0 {R/O}
Recover error warning (REW) : 0, 0, 0 {R/O}
Gap size : 0, 0, 0 {R/O}
EOD Defined : 0, 0, 0 {R/O}
Enable EOD generation (EEG) : 1, 1, 1 {R/O}
Synchronize early warning (SEW) : 1, 1, 1 {R/O}
Soft write protect (SWP) : 0, 0, 0 {R/O}
Buffer size at early warning : 000000h, 000000h, 000000h
Data compression algorithm : 00h, 00h, 00h
Associated write protect (ASOCWP) : 0, 0, 0 {R/O}
Persistent write protect (PERSWP) : 0, 0, 0 {R/O}
Permanent write protect (PRMWP) : 0, 0, 0 {R/O}
Is tape drive starting/stopping too often or slow?
Look at the disconnect-reconnect settings and some of the highlighted fields above. Both your tape backup software
vendor and hardware vendor should have good information on what settings are "best". The built in mode-page editor
can be used to set these to optimal values. Often you just need to modify something like a buffer empty or buffer
full ratio setting.
Is performance suffering due to media problems and/or errors?
Below comes from the log page inquiry. (By the way, you can monitor these values real-time during a backup via
threshold monitoring . Any error, whether corrected or uncorrected will require everything to stop for retries and
data correction attempts.
Note that our software does not keep track of how many times a tape has been used, or cleaned, or if the heads are
dirty. Most tape drives have this built-in capability, and our software provides this information to you.
Number of minutes of motion since last head cleaning: 94
Number of head cleanings: 5
Number of lost servo locks on writes: 0
Number of write servo dropouts: 0
Number of lost servo locks on reads: 0
Number of read servo dropouts: 0
Cartridge serial number: 496256
Number of times this cartridge loaded: 18
Number of beginning-of-tape markers passed for this tape: 253
Number of end-of-tape markers passed for this tape: 14
Number of cartridge write past counters: 27
Number of minutes cartridge has been in motion: 121
Buffer under-runs: 22
Buffer over-runs: 1
Write errors corrected with possible delays: 155808
Total Write errors: 345
Write errors corrected: 345
Times correction algorithm processed (on Writes): 0
Bytes processed (on Writes): 295436288
Unrecovered errors (on Writes): 0
Read errors corrected with possible delays: 0
Total Read errors: 1
Read errors corrected: 1
Times correction algorithm processed (on Reads): 1
Bytes processed (on Reads): 7602176
Unrecovered errors (on Reads): 0
1.42 TapeAlert Testing
This function can only be used on tape drives and autochangers which support the TapeAlert test feature. (Please
refer to the Tape Drive Testing and Optimization section for additional information not covered in this topic)
You would use this command to program a false (test) error, so you can see what would happen if you had a real tape
error. When invoked, the command performs the following functions. (For brevity, we will assume the unit has this
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