Tape drive system with tape surface inspection unit

Patent metadata

Field	Value
Publication number	US-10622016-B2
Application number	US-201816131440-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Sep 14, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A tape drive system for ensuring tape data integrity by tape surface inspection, the tape drive system being configured for reading and writing data from/to a magnetic tape, is provided. The tape drive system includes a laser inspection unit comprising a sender and a receiver integrated into the tape drive system, wherein the laser inspection unit configured for recognizing a tape defect by scanning the magnetic tape when the tape drive system is in operation. The tape drive system includes a read/write head configured for acting together with the laser inspection unit as sensors for providing sensor data during a read/write operation of the tape drive system, a communication link between the sensors and a controller unit for exchanging sensor data. The controller is configured for evaluating sensor data and for triggering predefined actions based on the respective evaluation results such that the tape data integrity is ensured.

First claim

What is claimed is:

1. A tape drive system for ensuring tape data integrity by tape surface inspection, the tape drive system being configured for reading and writing data from or to a magnetic tape, the tape drive system comprising:
a laser inspection unit comprising a sender and a receiver integrated into the tape drive system, the laser inspection unit configured for recognizing a tape defect by scanning the magnetic tape when the tape drive system is in operation, the laser inspection unit being a laser light source configured to send out light pulses towards the magnetic tape;
a read/write head configured for acting together with the laser inspection unit as sensors for providing sensor data during a read/write operation of the tape drive system; and
a communication link between the sensors and a controller nit for exchanging the sensor data;
wherein the controller is configured for evaluating the sensor data and for triggering predefined actions based on the respective evaluation results such that the tape data integrity is ensured.

2. The tape drive system according to claim 1 , wherein the laser inspection unit is positioned adjacent to the read/write head of the tape drive system.

3. The tape drive system according to claim 1 , wherein the laser inspection unit is configured for generating, as part of the sensor data, a time difference information between a point in time of sending a laser pulse from the laser light source of the laser inspection unit and receiving back the laser pulse reflected by the magnetic tape positioned in the tape drive system.

4. The tape drive system according to claim 1 , wherein the controller is configured for relating the tape defect to an error condition of which at least one error condition is selected from the group consisting of: a permanent write error, a permanent read error, and a tape bad spot correction threshold exceedance.

5. The tape drive system according to claim 1 , wherein the tape defect is at least one defect is selected from the group consisting of: a tape contamination, a scratch on the magnetic tape or, a fold of the magnetic tape.

6. A tape library system comprising:
a plurality of tape drives and at least one tape drive system according to claim 1 .

7. The tape library system according to claim 6 , wherein the laser inspection unit is positioned adjacent to the read/write head of the tape drive system.

8. The tape library system according to claim 6 , wherein the laser inspection unit is configured for generating, as part of the sensor data, a time difference information between a point in time of sending a laser pulse from a laser light source of the laser inspection unit and receiving back the laser pulse reflected by the magnetic tape positioned in the tape drive system.

9. The tape library system according to claim 6 , wherein the controller is configured for relating the tape defect with an error condition of which at least one error condition is selected from the group consisting of: a permanent write error, a permanent read error, and a bad spot correction threshold exceedance.

10. The tape library system according to claim 6 , wherein the tape defect is at least one tape defect selected from the group consisting of: a tape contamination, a scratch on the magnetic tape, and a fold of said magnetic tape.

11. A method for ensuring tape data integrity by tape surface inspection when using a tape drive system being configured for reading and writing data from or to a magnetic tape, the method comprising:
providing a laser inspection unit comprising a sender and a receiver integrated into the tape drive system, the laser inspection unit being a laser light source configured to send out light pulses towards the magnetic tape;
recognizing, by the laser inspection unit, a tape defect by scanning the magnetic tape when the tape drive system is in operation, wherein a read/write head acts together with the laser inspection unit as sensors for providing a sensor data during a read/write operation of the tape drive system;
exchanging the sensor data between the sensors and a controller unit;
evaluating, by the controller, the sensor data; and
triggering, based on the evaluating, predefined actions based on the respective evaluation results such that the tape data integrity is ensured.

12. The method according to claim 11 , further comprising:
winding, upon detecting the tape defect, the magnetic tape to a detected tape defect location and repeating scanning the magnetic tape with the laser inspection unit using a reduced winding speed of the magnetic tape compared to a winding speed of an initial detection of the tape defect under a normal operation mode.

13. The method according to claim 12 , further comprising:
performing a tape drive dump, upon also detecting a tape defect under the reduced winding speed.

14. The method according to claim 11 , further comprising:
generating a signal indicative of a need for manual inspection to a remote console.

15. The method according to claim 11 , further comprising:
upon detecting a tape drive contamination:
performing a loading of a cleaning tape into the tape drive system; and
performing a cleansing of the tape drive using the cleaning tape.

16. A method for operating a tape library system, the tape library system comprising a plurality of tape drives and at least one tape drive system for ensuring tape data integrity by tape surface inspection, the tape drive system being configured for reading and writing data from or to a magnetic tape, the tape drive system comprising:
a laser inspection unit comprising a sender and a receiver integrated into the tape drive system, the laser inspection unit configured for recognizing a tape defect by scanning the magnetic tape when the tape drive system is in operation, the laser inspection unit being a laser light source configured to send out light pulses towards the magnetic tape;
a read/write head configured for acting together with the laser inspection unit as sensors for providing a sensor data during a read/write operation of the tape drive system; and
a communication link between the sensors and a controller unit for exchanging the sensor data;
wherein the controller is configured for evaluating the sensor data and for triggering predefined actions based on the respective evaluation results such that the tape data integrity is ensured.

17. The method of claim 16 , further comprising:
upon detecting an operational error of one of the plurality of tape drives using a current magnetic tape:
loading the current magnetic tape into one of the at least one tape drive systems;
scanning the magnetic tape during operation of the tape drive system with the laser inspection unit; and
detecting a magnetic tape defect when the tape drive system is in operation.

18. A computer program product, comprising a computer readable hardware storage device storing a computer readable program code, the computer readable program code comprising an algorithm that when executed by a computer processor of a computing system implements a method of claim 16 .

Assignees

• IBM

Inventors

• Asmussen Ole
• Beiderbeck Robert
• Rueger Erik
• Schafer Markus

Classifications

• G11B20/1816 Primary

  Testing · CPC title

• G11B2020/1826

  wherein a defect list or error map is generated · CPC title

• G11B5/00821

  using stationary heads · CPC title

• G11B5/40

  Protective measures on heads, e.g. against excessive temperature  (G11B5/31 takes precedence; protection against wear G11B5/255  {; protective structure of the head: see under structures, e.g. G11B5/3106}) · CPC title

• G11B5/00813

  magnetic tapes · CPC title