Data Protector Express Installation Guide (TC330-96006, September 2011)

4 Installation Notes
Linux Installation Notes
SCSI generic module required for device support
If you are running Data Protector Express under Linux, you must install the sg (SCSI generic) module
for device support in Data Protector Express.
To verify that this module is loaded and running, issue the following command at a terminal prompt:
lsmod
sg should be listed in the list of running modules. If it is not listed, you must manually load this
module so that Data Protector Express can communicate with tape devices. Consult your operating
system documentation for instructions on manually loading the sg module.
Red Hat Enterprise Linux EXT3 hardware issue
If you are running Data Protector Express on Red Hat Enterprise Linux (RHEL) v3 or v4, a known
hardware issue exists when you use the EXT3 journal or file system on certain hardware
configurations. Update your Red Hat Enterprise Linux v3 or v4 installation to the latest kernel and
jbd patches listed below to resolve this issue:
• jbd-1.1-multiarch-1
• kernel-2.6.9-11.EL (RHEL 4)
• kernel-2.4.21-37.EL (RHEL 3)
IDE/ATAPI Support
Data Protector Express supports the use of IDE/ATAPI tape devices. If your Linux distribution
compiled the ide-tape.o module into the kernel, update the configuration file and verify the
configuration to access these devices.
NOTE: When Data Protector Express runs, it loads the ide-scsi module. This may cause the
ide-cdrom module to fail to load, which may affect CD operation. To work around this problem,
mount the CD as a SCSI device, even though it is an IDE device.
To update the configuration file and verify the configuration (LILO):
1. Add the following line to the end of each boot selection section in the /etc/lilo.conf file:
append="hda=ide-scsi"Master on primary IDE
append="hdb=ide-scsi"Slave on primary IDE
append="hdc=ide-scsi"Master on secondary IDE
append="hdd=ide-scsi"Slave on secondary IDE
2. Update your system configuration, using the following command:
lilo
3. Save the file and reboot your system.
4. Verify that the change has been implemented, using the following command:
cat /proc/cmdline
5. If hda=ide-scsi (or similar) does not appear, you did not update the configuration file correctly.
Start over with Step 1 above.
Linux Installation Notes 9