[8629] in linux-scsi channel archive
reading blocks > 32K with generic device
daemon@ATHENA.MIT.EDU (Jim Hammack)
Fri Apr 14 15:03:02 2000
Message-ID: <38F76AE8.BA0F1DEA@navo.navy.mil>
Date: Fri, 14 Apr 2000 14:00:56 -0500
From: Jim Hammack <HammackJ@navo.navy.mil>
MIME-Version: 1.0
To: linux-scsi@vger.rutgers.edu
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How can I read > 32 Kbytes from a generic scsi device? I am running
kernel 2.2.13 and using a Sony SDT-9000 DAT drive. I have data tapes
with a 40960 byte block size. I can read these tapes okay on an SGI
under IRIX 6.5, but under Linux I only get 32K bytes.
I have tried setting the block size with mt:
mt -f /dev/st1 setblk 40960
with no effect. I have tried using ioctl to set SG_SET_RESERVED_SIZE to
64K. The ioctl seemed to work and I could use SG_GET_RESERVED_SIZE to
verify it, but still no effect on reading the tapes.
Any ideas would be appreciated. Thanks.
--
Jim Hammack
Naval Oceanographic Office
Simulation and Visualization Branch
Stennis Space Center, MS 39522 USA
228.688.4112, HammackJ@navo.navy.mil
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