IBM TS2340 User Guide - Page 137
Automatically Retrieved SIM/MIM Data, Selective Tracing
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Linux Device Driver (lin_tape) If lin_tapeMaxDumpFiles is a positive number and lin_tapeAutoDriveDumpFileOverWrite is 1, each time a dump is obtained, lin_taped writes that data to a file until lin_tapeMaxDumpFiles have been created; then when a new drive dump is detected, lin_taped deletes the oldest drive dump file and creates a new file with the newest drive dump data; thus, only the newest data is kept. Automatically Retrieved SIM/MIM Data: If a condition occurs in the drive such that a drive SIM/MIM data is created, lin_taped retrieves the data and save it in a file named lin_tapex.timestamp.simmim, where lin_tapen is the device special file (for example, lin_tape1, lin_tape2, etc.) and timestamp reflects the time the file was created. Each time SIM/MIM data is obtained, it is written to a new file. The IBM service organization may request that you forward SIM/MIM data to them for analysis. The SIM/MIM data is stored in the /var/log directory by default. You may specify another directory in the /etc/lin_taped.conf file. There are two configuration parameters in the /etc/lin_taped.conf file that you can tailor to affect the number of SIM/MIM files that are kept on your system: v lin_tapeMaxSimMimDataFiles which can have a value of 0 or a positive decimal number. v lin_tapeAutoSimMimDataOverWrite which can have a value of 0 or 1. By default, lin_tapeMaxSimMimDataFiles is 0 and lin_tapeAutoSimMimDataOverWrite is 1, which means that every time SIM/MIM data is obtained, it is written to a new file. If lin_tapeMaxSimMimDataFiles is 0, lin_tapeAutoSimMimDataOverWrite is ignored, and each time SIM/MIM data is obtained, it is written to a new file. If lin_tapeMaxSimMimDataFiles is a positive number and lin_tapeAutoSimMimDataOverWrite is 0, each time SIM/MIM data is obtained, lin_taped writes that data to a file until lin_tapeMaxSimMimDataFiles have been created; then lin_taped stops creating new files, even if new SIM/MIM data are created. If lin_tapeMaxSimMimDataFiles is a positive number and lin_tapeAutoSimMimDataOverWrite is 1, each time SIM/MIM data is obtained, lin_taped writes that data to a file until lin_tapeMaxSimMimDataFiles have been created; then when new SIM/MIM data is detected, lin_taped deletes the oldest SIM/MIM file and creates a new file with the newest SIM/MIM data; thus, only the newest data is kept. Selective Tracing: lin_tape provides facilities by which you can disable and enable tracing, error logging, auto-retrieving drive dumps, and auto-retrieving SIM/MIM data. You may selectively enable/disable them through the IBMtapeutil Query/Set Tape Parameters operation or through an application program which uses the STIOC_SETP ioctl. These settings persist until the device driver is restarted, or the host system is rebooted. Note: See "Linux System - Tape Utility Program (IBMtapeutil)" on page 385 for information on the IBMtapeutil application. The parameters and their definitions are as follows: Chapter 5. Linux Tape and Medium Changer Device Driver 119