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tape: add estimated medium wearout to status

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This commit is contained in:
Dietmar Maurer
2021-01-22 08:06:25 +01:00
parent 8e6459a818
commit 337ff5a3cc
3 changed files with 21 additions and 2 deletions
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12
src/tape/drive/linux_tape.rs
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@ -261,6 +261,7 @@ impl LinuxTapeHandle {
bytes_read: None,
bytes_written: None,
medium_passes: None,
medium_wearout: None,
volume_mounts: None,
};
@ -276,10 +277,17 @@ impl LinuxTapeHandle {
if let Ok(volume_stats) = self.volume_statistics() {
status.medium_passes = Some(std::cmp::max(
let passes = std::cmp::max(
volume_stats.beginning_of_medium_passes,
volume_stats.middle_of_tape_passes,
));
);
// assume max. 16000 medium passes
// see: https://en.wikipedia.org/wiki/Linear_Tape-Open
let wearout: f64 = (passes as f64)/(16000.0 as f64);
status.medium_passes = Some(passes);
status.medium_wearout = Some(wearout);
status.volume_mounts = Some(volume_stats.volume_mounts);
}