Date: Sun, 26 Jan 2014 08:52:03 +0000 From: Ben Laurie <ben@links.org> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: freebsd-scsi@freebsd.org Subject: Re: Dropped interrupts Message-ID: <CAG5KPzwvBoBvh210Vn5GG6eBVNXKWCkuh6J_FLGao0L6aPAmcw@mail.gmail.com> In-Reply-To: <8680A21D-78D7-4B65-A502-17F0C3B70291@scsiguy.com> References: <CAG5KPzxUAnORPSyJDrSdBBNE7MBi-dD=M6=E1rMG%2Bc8rn4deUQ@mail.gmail.com> <AE41EB93-26BD-4BD0-9913-7CD0A5B6E1A4@scsiguy.com> <CAG5KPzwR5=WNKc5hck8F7CtCtk3mivwYFRFeCJT_zWdnetW=3w@mail.gmail.com> <84D23688-DDC6-421E-9D21-3DA646229038@scsiguy.com> <CAG5KPzxqxmzfnAiUyVyApMs5XqKpH0F0sbTxy1h=4cL=rEROpQ@mail.gmail.com> <CAG5KPzyPXLEOAFKTAW%2BJaai=XbT3mi5yGHs1LnUbMcD-LfQ1YQ@mail.gmail.com> <CAG5KPzzVpvH=miguqKnO0pA2jmWm-_7s7W-Nbh%2BVeHKv7x7ikw@mail.gmail.com> <8680A21D-78D7-4B65-A502-17F0C3B70291@scsiguy.com>
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On 25 January 2014 17:15, Justin T. Gibbs <gibbs@scsiguy.com> wrote: > On Jan 24, 2014, at 10:44 PM, Ben Laurie <ben@links.org> wrote: > >> Aha, finally got the error again=85 > > I don=92t know enough about your backup or Bacula to know if this is amou= nt that should be written, but we attempted a write in variable block mode = of 64512 bytes. I don;t think there's anything wrong with that. Not at the machine right now, but I think that's actually the default max block. No idea why. > The command, data transfer list, and controller state are all consistent= with this. The command was successfully transferred to the tape drive, bu= t it never transitioned to data phase to allow us to begin the data transfe= r. (In parallel SCSI, the target controls all state transitions). > > Since there are no parity errors or other indications of a transport erro= r, my hunch is that this is a tape drive issue. Are you running the latest= available firmware for it? No idea, its a very old LTO-2 drive. I'll see if I can find an update. > How many write cycles do you have on your media? I have seen this error on brand new media. I'd guess the most cycles any tape has had is around 10. > When was the last time you cleaned the drive? LTO drives are self-cleaning. So ... never. > There are still some bugs in the formatting of the diagnostic output for = this driver. I=92ll fix these up and get them into HEAD. > > =97 > Justin
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