Seagate DAT Drive DDS Manuel D'installation page 35

Seagate DAT Drive Installation Manual—English
Note: The main difference between support on Irix 5.x
and 6.x is the introduction for Data Compression
switching via software in Irix version 6.2. When running
5.x, the drive will always operate in the compression
setting determined by Switch 6 on the bottom of the drive
(off=compression enabled (default), on=compression
disabled).
See the beginning of this chapter for information on changing
the Inquiry string and replacing PRTNO with the number
applicable to your drive.
Irix V6.x
To configure Irix 6.x to use the Scorpion-24, you must modify
the files /var/sysgen/master.d/scsi and
/dev/MAKEDEV.d/TPS_base then rebuild the kernel, as
described below:
1. Add the following entry to the file
/var/sysgen/master.d/scsi
{ DATTAPE, TPDAT, 7, 12, "ARCHIVE", "Python
PRTNO"/*DAT*/, 0, 0, {0},
/* This drive uses mode select page 0xf for
compression control;
* most of the other drives supporting
compression use page 0x10 */
MTCAN_BSF|MTCAN_BSR|MTCAN_APPEND|MTCAN_SETMK|MTCA
N_PART|MTCAN_PREV|
MTCAN_SYNC|MTCAN_SPEOD|MTCAN_CHKRDY|MTCAN_VAR|MTC
AN_SETSZ|
MTCAN_SILI|MTCAN_SEEK|MTCAN_CHTYPEANY|MTCAN_COMPR
ESS,
/* minimum delay on i/o is 12 minutes, to allow
the Drives
* full error recovery sequence to be
performed. */
40, 12*60, 12*60, 12*60, 512, 512*512, 0, (u_char
*)0 },
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