Chapter 6 UNIX Settings
A Word About SCSI Controllers
54 LTO-3 Tape Drive User’s Guide
A Word About SCSI Controllers 6
The LTO-3 Tape Drive transfers data natively at 68 Mbytes per second. It
supports the SCSI Ultra 160 specification and can transfer data at burst
rates of up to 320 Mbytes per second. To achieve maximum drive
performance, it is important to choose high-performance disk drives for
your system, as well as high-performance SCSI controllers.
Configuring for the DEC/Compaq UNIX Environment 6
Finding Existing
SCSI Controllers
and Devices
6
SCSI ID #7 is almost always dedicated to the SCSI controller. Never
configure your target device for ID 7 unless you are absolutely sure that
the controller is not addressed for ID 7.
Configuring Digital
UNIX Version 4.0
and later/Compaq
Tru64 Unix 5.x
6
Use File Manager to open the file /etc/ddr.dbase and create an entry as
follows:
SCSIDEVICE
#
Type=tape
Name="CERTANCE""ULTRIUM 3"
#
PARAMETERS:
TypeSubClass=tk
TagQueueDepth=0
MaxTransferSize=0x0ffffff#(16MB-1)
ReadyTimeSeconds=180#seconds
CMD_PreventAllow=supported
CMD_ExtReserveRelease=supported
BlockSize=0
PwrMgmt_capable=0
DENSITY:
#
DensityNumber=0,2,3,4,5,6,7
DensityCode=default
CompressionCode=0x0
Buffered=0x1
