🚀 go-pugleaf

I am having trouble getting an Archive Viper 2525 drive to read it's own 
low-density writes under Linux.  I don't have any 6525 tapes, so I've 
been trying to write/read 6250 tapes...  This drive will read archives 
written by my old 6150 tape drive, but it won't read it's /own/ writes to 
the 6250 tapes after I remove and re-insert the tape (if I don't remove 
and then re-insert the tape, it can read the tape until I do so).

What's going on here?  I have the non auto-detect-on-insert firmware 
revision (this drive doesn't detect tape density on insertion of the 
tape, rather, it determines tape density when the first read is attempted).

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