Minh D Vu

US Patent:

6744593, Jun 1, 2004

Filed:

Oct 13, 2000

Appl. No.:

09/689837

Inventors:

Ashok B. Nayak - Glendora CA
Robert R. Heinze - San Clemente CA
Minh M. Vu - Midway City CA
Son Hung Truong - Westminster CA
James M. Decot - Fountain Valley CA
John A. Hamming - Laguna Niguel CA
Robert Lindner - Mission Viejo CA

Assignee:

Seagate Technology LLC. - Scotts Valley CA

International Classification:

G11B 1560

US Classification:

360 95, 36013021, 36013031, 242348

Abstract:

A tape drive having a cartridge receiving area for receiving a cartridge containing a recording medium on a supply reel is disclosed. The tape drive has a take-up reel. The take-up reel includes a take-up rotatably mounted to the tape drive and a pair of flanges mounted on either side of the take-up hub. A magnetic read/write head is disposed between the cartridge receiving area and the take-up reel. A pair of fixed guide assemblies is disposed symmetrically about the magnetic read/write head. Each of the fixed guide assemblies has a fixed guide mount fixed to the tape drive, a fixed guide attached to a top of the fixed guide mount, and a spring/pressure pad having at least one pressure pad mounted to the fixed guide, wherein the pressure pad applies pressure to a top edge of the recording medium when the tape drive is operational. The tape drive also has a forward guide roller and a rearward guide roller disposed symmetrically about the magnetic read/write head. The forward guide roller is located between the cartridge receiving area and the one of the pair of fixed guide assemblies and the rearward guide roller is located between the take-up reel and the other of the fixed guide assemblies.

US Patent:

7945419, May 17, 2011

Filed:

Aug 14, 2008

Appl. No.:

12/191823

Inventors:

Ming-chih Weng - Los Angeles CA, US
Turguy Goker - Solana Beach CA, US
James Mark Decot - Fountain Valley CA, US
Minh Vu - Midway City CA, US
John A. Hamming - San Clemente CA, US

Assignee:

Quantum Corporation - San Jose CA

International Classification:

G01P 3/00
G11B 15/52

US Classification:

702145, 702142, 360 7311, 360 7505

Abstract:

In a method of electronically measuring reel off-center run-out and reel hub mismatch, tape speed data related to a tape coupled with an operating drive reel is electronically measured. The tape speed data is correlated with drive reel rotation angles. The correlated tape speed data is translated to drive reel hub radii variations with respect to the drive reel rotation angles. The drive reel hub radii variations comprise an operational measure of reel off-center run-out and reel hub mismatch of the drive reel.