Hello, I am testing pbs 2.0-9 on an old HP MSL6030 tape library with two LTO4 drives inside. The first backup seems quite slow compared with usual ones (made with dump command).
dump: 2426.42GB in 47 hours, so more or less 14MB/s
pbs: 135GB in 6 hours, so about 6MB/s
Hers's the job detail:
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