Date: Sat, 13 Jan 1996 23:33:52 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Cc: wilko@yedi.iaf.nl (Wilko Bulte) Subject: Re: A few NITS about SCSI Tapes Message-ID: <199601132233.XAA02099@uriah.heep.sax.de> In-Reply-To: <199601131805.TAA00481@yedi.iaf.nl> from "Wilko Bulte" at Jan 13, 96 07:05:12 pm
next in thread | previous in thread | raw e-mail | index | archive | help
As Wilko Bulte wrote: > > Sidestepping a bit: will 2.1R mt also set (no)compression on Exabytes > capable of hardware compress? The &*^*( drive at work is a 8505 and > my ol' home 8200 does not grok compressed tapes. Nobody bothered to implement it so far. Please, try to patch your /usr/share/misc/scsi_modes with: Index: share_misc/scsi_modes =================================================================== RCS file: /home/cvs/src/share/misc/scsi_modes,v retrieving revision 1.3 diff -u -r1.3 scsi_modes --- scsi_modes 1995/12/28 14:24:08 1.3 +++ scsi_modes 1996/01/13 22:02:18 @@ -229,3 +229,32 @@ {Output Port 3 Channel Selection} t4 {Output Port 3 Volume} i1 } + +# Sequential-access Device Configuration Page + +0x10 { + {Reserved} *t1 + {CAP} t1 + {CAF} t1 + {Active Format} t5 + {Active Partition} i1 + {Write Buffer Full Ratio} i1 + {Read Buffer Empty Ratio} i1 + {Write Delay Time} i2 + {DBR} t1 + {BIS} t1 + {RSmk} t1 + {AVC} t1 + {SOCF} t2 + {RBO} t1 + {REW} t1 + {Gap Size} i1 + {EOD Defined} t3 + {EEG} t1 + {SEW} t1 + {Reserved} *t3 + {Buffer Size at Early Warning} i3 + {Select Data Compression Algorithm} i1 + {Reserved} *i1 +} + ...and see if you could edit the ``Select Data Compression Algorithm'' field to ``1'' using: scsi -f /dev/st0ctl.0 -m 0x10 -e (Don't worry about the dozens of acronyms. They are taken straight out of the SCSI-2 document, but you won't care too much anways.) -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199601132233.XAA02099>