Unix Settings
Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)
46
To enable the tape driver to turn on data compression when writing data to tape use the
.c
. option.
For commands that use density and tape size settings, the tape density is 124,000 bpi and the tape
length is 1800 feet. For commands that use a blocking factor, we recommend a blocking factor of
64 as a minimum (128 is recommended).
Configuring for the Sun Environment
(Solaris 2.4, 2.5, 2.6, 7, 8, and 9)
Use the following for attaching the LTO-2 half-height drive to Sun Sparc and Intel systems.
Finding Current SCSI Controllers and Targets
To properly attach SCSI devices to hosts it is necessary to ensure that each target device has a
unique SCSI address. The commands
.modinfo.
and
.
dmesg
.
can be used to find the SCSI con-
trollers in use and the SCSI target devices installed.
For example, the command .dmesg | egrep .target. | sort | uniq. can find all SCSI controllers and
SCSI targets. The output may look similar to:
sd32 at ithps0: target2 lun0
sd34 at ithps0: target4 lun0
st21 at ithps1: target0 lun0
st22 at ithps1: target1 lun0
In this case, the LTO-2 half-height drive can be set for SCSI ID address 2 through 6 and attached to
controller ithps1 (this particular controller also supports SCSI addresses 8 through 15).
Types of Controllers
You may be able to view the main pages of three types of SCSI controllers for Sun Sparc systems:
•
esp
•
glm
•
isp
We recommend that the LTO-2 half-height drive not be attached to esp controllers. This controller is
not fast enough to work with the LTO-2 half-height drive. The minimum recommended controller
would be a glm controller, which is an Ultra Wide controller.
We recommend Ultra2 SCSI-capable controllers capable of 80MB/s data transfer as a minimum.
Slow backups will result if using slower SCSI controllers.
