Quantum Tape Drive LTO-3 - Manual (Page 73)

Chapter 6 UNIX Settings
Configuring for SCO Open Server 5.0.x
LTO-3 Tape Drive User’s Guide 59
Set
RESERVE/RELEASE support
to
yes
.
Set
BLOCK SIZE for variable length support (Num.)
to
0
.
Set
Density 1
to
0
.
6
Leave the
Set delay. . .
and
Set timeout. . .
lines at the default value.
7
Click
OK
and the drive will be installed in the system database, and
devices created. There is no need to reboot the system.
8
Exit
SMIT
.
Configuring for SCO Open Server 5.0.x
6
Finding Existing
SCSI Controllers
and Devices
6
The files
/usr/adm/hwconfig and /var/adm/messages
list the devices
found during boot up of Open Server. The current SCSI controllers can be
found using the command:
grepadapter/usr/adm/hwconfig
This command produces output similar to:
%adapter 0x6400–0x64FF 11 type=alad ha=0
bus=0 id=7 fts=st0.
The current tape drives can be found using the command:
grep tape /usr/adm/hwconfig
Note:
We suggest using the AIX commands
.backup
and
restore
when transferring data to and from the LTO-3 Tape Drive.
These commands transfer data more quickly than other
commands such as
tar
and
cpio
. For
cpio
, we suggest a
blocking factor of 128. For
tar
, we suggest using the
.N
option
and a factor of 128. Some older systems with poor video
controllers may experience a reduction in performance when
using the
.v
option, which prints the path names on the
standard console during the backup. Unless there is a real
need to see the filenames as they are backed up we suggest not
using the
.v
option. For commands that use density and tape
size settings the tape density is 124,000 bpi and the tape length
is 1800 feet.