Browse Prior Art Database

Statistical Analysis and Reporting System

IP.com Disclosure Number: IPCOM000121277D
Original Publication Date: 1991-Aug-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Tanner, F: AUTHOR [+2]

Abstract

As shown in the figure, the basic concept described is for a cartridge-based magnetic recording system which gathers performance measures (statistics or counts of specified events) each and every time a cartridge is mounted. These counts are then combined with the past history of the cartridge to produce statistical measures of the level of performance and performance trends of the cartridge. These statistical measures are then compared to various thresholds to determine media quality. Alert messages are generated if user action is required. The now condensed history is then recorded on the cartridge (when the cartridge is demounted) and is available for further processing the next time the cartridge is mounted.

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Statistical Analysis and Reporting System

      As shown in the figure, the basic concept described is
for a cartridge-based magnetic recording system  which gathers
performance measures (statistics or counts of specified events) each
and every time a cartridge is mounted.  These counts are then
combined with the past history of the cartridge to produce
statistical measures of the level of performance and performance
trends of the cartridge.  These statistical measures are then
compared to various thresholds to determine media quality.  Alert
messages are generated if user action is required.  The now condensed
history is then recorded on the cartridge (when the cartridge is
demounted) and is available for further processing the next time the
cartridge is mounted.

      These single cartridge mount statistics are also combined with
the drive statistical histories (saved on the CU diskette) to develop
drive-dependent performance trends for generating user alert messages
for the drive.  The condensed drive statistical history is also saved
in the CU memory and is available for further processing when the
next cartridge is mounted.

      These cartridge and hardware performance measures are utilized
to:
a)   Identify when cartridges should be rewritten from first customer
sector (to evoke a write skip operation over a degraded region of
media);
      b)   Identify when cartridges should be purged from the
customer library;
      c)   Identif...