Certance LTO 1 User Manual page 58

Unix Settings
Configuring the Device File st.conf
To configure Solaris 2.4 and above to use the LTO-1 and LTO-2 drives correctly, add the following
lines to the file st.conf in the directory /kernel/drv.
tape-config-list=
"CERTANCEULTRIUM 2","Seagate LTO","SEAGATE_LTO";
SEAGATE_LTO=1,0x36,0,0x1d639,4,0x00,0x00,0x00,0x00,1;
NOTE: If installing a Seagate LTO 1 tape drive, replace "CERTANCEULTRIUM 2" with
"SEAGATE ULTRIUM06242-XXX." The inquiry string above contains one space between
SEAGATE and ULTRIUM.
The value 0x1d639 equates to the way that the LTO-1 and LTO-2 drives are configured to operate in
the Solaris environment. This value enables the LTO-1 and LTO-2 drives to:
Support variable length records (variable length block size)
Backspace over files (same as .mt bsf. command to backspace over filemarks)
•
Backspace over records (same as .mt bsr., backspace over individual tape blocks)
•
Long timeout for long erase function (it is not recommended to try and erase the entire tape)
•
LTO-1 and LTO-2 drives know when end of data has been encountered
•
Device driver is unloadable
•
Long timeouts (5 times longer than normal)
•
Buffered writes supported
•
Variable record size not limited to 64k
•
Uses Mode Select Page 10h to enable/disable compression
•
Once st.conf has been modified, the kernel must be reconfigured by booting the system using the
boot-r command. If you are replacing a tape device with the same SCSI ID you may want to
delete the st devices from the /dev/rmt directory (recommended).
When using commands that require a blocking factor such as tar or ufsdump, we suggest a mini-
mum factor of 64. The preferred factor is 128.
For commands that use density and tape size settings the tape density is 124,000 bpi and the tape
length is 1800 feet. We suggest using the ufsdump/ufsrestore commands. These commands
automatically detect end of tape without the need of the density and tape length settings.
To enable the st driver to turn on data compression when writing data to tape use the .c. option. For
example, tar cf /dev/rmt/0c causes the tape drive to compress the data before writing the
data to tape.
Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)
58