IBM TS2340 User Guide - Page 123
Compression, Disable Auto Drive Dump, Disable SIM logging, Logging Volume Logging
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Linux Device Driver (lin_tape) Compression Hardware compression is implemented in the device hardware. This parameter turns the hardware compression feature On and Off. If compression is enabled, the effective performance can increase, based on the compressibility of the data. The installation default is On (use compression). Disable Auto Drive Dump This parameter is provided in the lin_tape version 1.2.2 or later. It is set to FALSE by default. If it is FALSE and the lin_taped daemon is running and if an error occurs in the drive which creates a drive dump, the lin_tape device driver automatically retrieves the drive dump and saves it under the /var/log directory by default. You may specify another directory in the /etc/lin_taped.conf file. Please refer to "Configure and Run lin_taped Daemon" on page 116 in this chapter for details. Disable SIM logging This parameter is provided in the lin_tape version 1.2.2 or later. It is set to FALSE by default. If it is FALSE and the lin_taped daemon is running and SIM/MIM data is generated by the drive, the lin_tape device driver automatically retrieves the data and saves it in a formatted text file under the /var/log directory by default. You may specify another directory in the /etc/lin_taped.conf file. Please refer to "Configure and Run lin_taped Daemon" on page 116 in this chapter for details. This capacity is not applicable to IBM Ultrium tape drives. Logging (Volume Logging) This parameter turns the volume information logging On or Off. With the lin_tape version 1.2.2 and later, the lin_tape device driver provides this support. It is set to On by default. If logging is On and the lin_taped daemon is running, the lin_tape device driver retrieves the full log sense data from the drive whenever a tape is unloaded, or the drive reaches a log threshold. The log file is saved in binary format under the directory /var/log by default. You may specify another directory in /etc/lin_taped.conf file. Please refer to "Configure and Run lin_taped Daemon" on page 116 in this chapter for details. Note: This is volume logging, which is different from error logging. lin_tape provides error logging whenever the lin_taped daemon is running. Please refer to "Configure and Run lin_taped Daemon" on page 116 in this chapter for details on error logging. Logical Write Protect This parameter sets or resets the logical write protect of the current tape on Enterprise Tape System 3590 tape subsystems. The three types of logical write protect are: associated protect, persistent protect, and write-once read-many (WORM) protect. 1. Associated protect remains only while the current tape is mounted or associated with the tape drive. It is reset when the tape is unloaded or the tape drive is reset. 2. Persistent protect remains or persists with the tape across mounts until it is reset. 3. WORM protect also remains with the tape across mounts, but unlike persistent protect it cannot be reset on the tape. After a tape is WORM protected, it can never be written on again. Chapter 5. Linux Tape and Medium Changer Device Driver 105