IBM TS2340 User Guide - Page 130
Open Source Device Driver - lin_tape, IBMtape and lin_tape Comparison, Installation
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Linux Device Driver (lin_tape) Note: See Chapter 10, "IBM Tape Diagnostic Tool (ITDT)," on page 259 or "Linux System - Tape Utility Program (IBMtapeutil)" on page 385 Open Source Device Driver - lin_tape The lin_tape device driver is the new device driver for the Linux 2.6 kernels to replace the closed-source driver IBMtape. In most respects, it behaves the same as the closed-source IBMtape device driver. This section covers significant differences between the IBMtape driver and the lin_tape driver. IBMtape and lin_tape Comparison Table 19 compares the names for various components of the IBMtape and lin_tape device drivers. Table 19. IBMtape and lin_tape Comparison Component Driver name Module name Special files proc entry Daemon name Daemon configuration file Daemon trace files IBMtape IBMtape IBMtape.ko /dev/IBMtape0 /dev/IBMchanger0, etc. /proc/scsi/IBMtape /proc/scsi/IBMchanger IBMtaped /etc/IBMtaped.conf /var/log/IBMtape.trace /var/log/IBMtape.errorlog Lin_tape lin_tape lin_tape.ko No change No change lin_taped /etc/lin_taped.conf /var/log/lin_tape.trace /var/log/lin_tape.errorlog The IBMtapeutil utility is the same for both the IBMtape driver and the lin_tape driver. Note: This is performed using tape diagnostic and utility functions. Installation Installation of the lin_tape driver is the same as for the IBMtape driver, except that IBMtape should be replaced with lin_tape in all of the installation instructions. Refer to the section "Installation and Configuration Instructions" on page 96 of this chapter for details. The lin_tape driver cannot be installed if the IBMtape driver is already installed. If the IBMtape driver is installed, first uninstall the IBMtape driver, and then install the lin_tape driver. With RHEL4 and SLES10, driver removal also requires a reboot of the server, since the IBMtape driver module is ″permanent″ in these distributions. Driver parameters and special device files The driver parameters have not changed for the lin_tape driver. However, it is important to note that the module parameters, such as ″alternate_pathing″ and ″dpf_keys″, must now be applied to the lin_tape module, instead of the IBMtape module. For example, in the /etc/modprobe.conf (for Red Hat) or /etc/modprobe.conf.local (for SUSE) file, add the following line for LTO library's path failover: 112 IBM Tape Device Drivers Installation and User's Guide