International Business Machines Corporation

Illarion Borisevich

Khanh V Ngo

David Lee Swanson

Shawn Michael Nave

Said Abdullah Ahmad

Timothy Keith Pierce

Ernest Stewart Gale

Pamela Ruth Nylander-Hill

Josephine Faith Bayang (Kubista)

In one general embodiment, a method for selecting parameters of an error recovery procedure includes detecting an error during performance of a data operation on a data storage medium by an apparatus. In response to detecting the error, parameters of an error recovery procedure are selected based at least in part on: (a) first information about previous interactions between the apparatus and multiple data storage media, and (b) second information about previous interactions between the data storage medium and other apparatuses.

Adjusting error recovery procedure (ERP) in data drive based on historical ERP information

A tape may be mounted into a tape drive. Mounting the tape into the tape drive may include loading the tape from a storage slot. The tape drive may request a first record of the tape from a tape storage subsystem. The tape drive may determine whether the first record of the tape exists in the tape storage subsystem. The tape drive may load the first record of the tape in random access memory (RAM) of the tape drive. The first record may include one or more data entries. The tape drive may append a new data entry to the first record. The first record may be transitioned to a second record upon being appended with the new data entry. The tape may be unmounted from the tape drive.

Automatic volume statistical and performance information tracking

Provided are a tape drive, tape drive controller, and method for measuring amplitudes of written tracks to determine errors in read and write elements. The write element writes a data pattern and erase pattern to the tape medium to provide the data pattern and the erase pattern on sides of the data pattern. The read element is positioned to measure amplitudes at offsets in the data pattern. The offsets and the amplitudes at the offsets are processed to estimate a maximum amplitude read while the read element is estimated to be positioned entirely in the data pattern and estimate an offset at which the read element reads a fixed percentage of the maximum amplitude. A width of the read element is estimated based on the estimated offset. The estimated width of the read element is outputted to determine whether the estimated width of the read element is acceptable.

Measuring amplitudes of written tracks in a tape drive to determine errors in read and write elements in the tape drive

Embodiments for predetermining optimal demount position for demounting data storage cartridges in an automated data storage library by a processor. A selected demount position may be predetermined, while performing one of a plurality of robotic movements by an accessor, for each mounted data storage cartridge for demounting data storage cartridges in the automated data storage library. The selected demount position is recalculated for each mounted data storage cartridge for demounting the data storage cartridges while performing a subsequent demount operation, where the selected demount position is determined according to the recalculation prior to a demount command being issued. Accordingly, the idle time of the accessor during a demount operation may be reduced.

Predetermined placement for tape cartridges in an automated data storage library

Embodiments for predetermining optimal demount position for demounting data storage cartridges in an automated data storage library by a processor. A selected demount position may be predetermined, while performing one of a plurality of robotic movements by an accessor, for each mounted data storage cartridge for demounting data storage cartridges in the automated data storage library such that each predetermined selected demount position is stored in a lookup table of predetermined selected demount positions for a subsequent demount operation. The idle time of the accessor during a demount operation may be reduced.

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Tucson, AZ, United States of America

Illarion Borisevich