[2558] in SIPB-AFS-requests
DLT drive
daemon@ATHENA.MIT.EDU (Jonathon Weiss)
Mon Nov 25 18:11:28 1996
From: Jonathon Weiss <jweiss@MIT.EDU>
To: sipb-afsreq@MIT.EDU
Cc: sipb-office@MIT.EDU
Date: Mon, 25 Nov 1996 18:08:43 EST
I remember that around the time SIPB bought the DLT drive, there was
some discussion of the fact that it was not streaming. In the last
few weeks ASO has moved some of its DLT drives onto a Solaris (2.3)
sun for use with non-AFS backups. Teh drive was very slow (much
slower than an exabyte) until the following lines were added to
/kernel/drv/st.conf:
tape-config-list = "Quantum DLT4000", "Quantum DLT4000", "DLT-data";
DLT-data = 1, 0x26, 0x4000, 0x19, 4, 0x83, 0x82, 0x81, 0x80, 3;
I don't know if the non-streaming problem was ever solved, or if this
will help, but I don't see anything like this is installed on bill, so
it might. Somoeone doing an afs backup might want to try installing
these lines (and rebooting?), and seeing whether the performance
improves any. I believe that the numbers were translated from sunos,
where they were probably gotten from a vendor.
Jonathon
