User`s guide

Chapter 3 UNIX Configuration Procedures
Configuring IBM AIX UNIX Environments
LTO-3 Half-Height Tape Drive User’s Guide 31
5 Change the following standard options to maximize drive
performance and functionality:
a Set the
Connection Address with the Drives Target and Lun (always
use
Lun 0). In the list, the target device is the first number and the
Lun is the second. For example, if the drive is ID 5, choose 5,0.
b Set the
BLOCK size to 0.
c Set
Use DEVICE BUFFERS during writes to yes.
d Set
RETURN error on tape change or reset to no.
e Set
Use EXTENDED file marks to yes.
f Set
RESERVE/RELEASE support to yes.
g Set
BLOCK SIZE for variable length support (Num.) to 0.
h Set
Density 1 to 0.
6 Leave the
Set delay. . . and Set timeout. . . lines at the default value.
7 Click
OK to install the drive in the system database and create the
devices. There is no need to restart the system.
8 Exit SMIT.
9 Subsequently:
a Use the AIX commands
backup and restore to transfer data to
and from the LTO-3 Half-Height Tape Drive. They transfer data
much more quickly than other commands such as
tar and cpio.
However, for:
•
cpio, use a blocking factor of 128
•
tar, use the N option and a factor of 128
Note: Some older systems with poor video controllers might
experience a degradation 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, do not use the
v
option.