IP Library Granted Patent US 9,087,538
Granted Patent B2
US 9,087,538 · App. 14/547,504 · Granted Jul 21, 2015

Tape servo track write compensation

Inventor: Philipp Herget (San Jose, CA)
Assignee: International Business Machines Corporation
G11B5/4893G11B5/584
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Quick Facts
Patent No.
US 9,087,538
App. No.
14/547,504
Granted
Jul 21, 2015
Kind
B2
Abstract

Recording a servo write head spacing for writing servo tracks on a magnetic tape in a manufacturing environment. One or more environmental condition measurements of the manufacturing environment are received by a computer. A pair of servo tracks is written on a magnetic tape by a pair of servo write heads at a nominal spacing. The one or more environmental condition measurements of the manufacturing environment and information pertaining to the spacing of the servo tracks on the magnetic tape are recorded in one or more data stores.

Claims (7)

1. A method for recording a servo write head spacing for writing servo tracks on a magnetic tape in a manufacturing environment, the method comprising:

receiving, by one or more processors, one or more environmental condition measurements of the manufacturing environment;

writing a pair of servo tracks on a magnetic tape by a pair of servo write heads at a nominal spacing; and

recording in one or more data stores the one or more environmental condition measurements of the manufacturing environment, and information pertaining to the spacing of the servo tracks on the magnetic tape.

2. A method in accordance with claim 1 , wherein the information pertaining to the spacing of the servo tracks includes one or more of: the nominal spacing of the servo write heads; a coefficient of thermal expansion for the magnetic tape; a coefficient of hygroscopic expansion for the magnetic tape; a coefficient of thermal expansion for a substrate of the servo write heads; and a coefficient of hygroscopic expansion for a substrate of the servo write heads.

3. A method in accordance with claim 1 , further comprising writing two or more servo tracks on the tape with at least the pair of servo write heads, the pair of servo write heads located within the manufacturing environment.

4. A method in accordance with claim 1 , wherein a data store is one of: media auxiliary storage of a tape cartridge of the tape; a magnetic data written on the tape; and a dataset on a computer-readable tangible storage medium on a host computing system.

Assignments (6)
RELEASE OF SECURITY INTEREST Recorded May 12, 2021
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: GLOBALFOUNDRIES U.S. INC.
Reel/Frame 056987/0001 →
RELEASE OF SECURITY INTEREST Recorded Nov 20, 2020
From: WILMINGTON TRUST, NATIONAL ASSOCIATION
To: GLOBALFOUNDRIES INC.
Reel/Frame 054636/0001 →
SECURITY AGREEMENT Recorded Nov 29, 2018
From: GLOBALFOUNDRIES INC.
To: WILMINGTON TRUST, NATIONAL ASSOCIATION
Reel/Frame 049490/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 5, 2015
From: GLOBALFOUNDRIES U.S. 2 LLC; GLOBALFOUNDRIES U.S. INC.
To: GLOBALFOUNDRIES INC.
Reel/Frame 036779/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 3, 2015
From: INTERNATIONAL BUSINESS MACHINES CORPORATION
To: GLOBALFOUNDRIES U.S. 2 LLC
Reel/Frame 036550/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 19, 2014
From: HERGET, PHILIPP
To: INTERNATIONAL BUSINESS MACHINES CORPORATION
Reel/Frame 034209/0381 →
Continuity (2)
Division 14132195 · Dec 18, 2013
Related Publication 20150170692A1 · Jun 18, 2015