The feature switches are on the rear panel of the tape drive. See 1 in the Figure 3
on page 2 for the location of the switches. The switches are labeled 1 through 8
and the On and Off positions are marked. The feature switches are defined in the
following table.
Table 2. Feature switch definitions
Switch On function Off function
1 Library interface at 9 600 baud /
polled
Library interface at 38 400 baud /
non-polled
2 Library interface uses two stop bits Library interface uses one stop bit
3 Reserved Reserved
4 Library interface at 115 000 baud
rate
Switch 1 active
5 Enable ADI Enable LDI
6 Reserved Reserved
7 Disable head brush ERP* Enable head brush ERP*
8 Reserved Reserved
Note: The default settings for the feature switches are all switches placed in the Off
position.
*The head brush error recovery procedure (ERP) is intended to prevent a permanent read
or write error by removing debris that might have accumulated on the read or write head.
In order to brush the head, the tape must be unthreaded to expose the head. This forces
the loader to be cycled to enable re-thread. During the loader cycling, the back of the
cartridge will temporarily extend beyond the front of the bezel. Extension of the cartridge
is problematic in some automation environments, so you have the ability to disable this
function. If the head brush ERP is disabled, the drive will immediately report the
permanent error instead of activating the head brush ERP.
Mount the drive in an enclosure or server
About this task
When you mount the drive in an enclosure, observe the following guidelines:
v Use the installation instructions for your enclosure if possible.
v Use the drive rails that come with your enclosure or server, unless you have
x3400 or x3500 System x servers. Mount the drive into x3400 or x3500 System x
servers using the metal rails included with your tape drive.
v Do not obstruct the ventilation slots at the rear of the drive.
Attention: When the mounting screws or drive rail prongs are inserted into the
drive, they must not extend farther than 2.5 mm (0.098 in.) inside the chassis.
Otherwise, they might damage the drive.
Chapter 2. Installing 7
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