Patent
Range-based cache control system and method
Ralph H. Castro,Virgil V. Wilkins,Tsun Y. Ng +2 more
- 25 Jul 2003
131
TL;DR: In this article, a disk drive having a cache control system that generates scan results that permit response to a host command using existing cached data having a logical block address (LBA) range that overlaps the host command LBA range.
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Abstract: The present invention relates to disk drive having a cache control system that generates scan results that permit response to a host command using existing cached data having a logical block address (LBA) range that overlaps a host command LBA range. The cache control system forms variable length segments of memory clusters in a cache memory for caching disk data in contiguous LBA ranges. The cached LBA ranges are scanned for segments having LBA ranges overlapping with an LBA range of a host command. The cache control system is effective in exploiting any existing overlapping cache data.
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Citations
Patent
Method and apparatus for performing force unit access writes on a disk
Raymond Yu,Srinivas Neppalli,Brian E. Jones +2 more
- 30 Jun 2011
TL;DR: In this paper, a disk drive comprising a rotatable disk, a head actuated over the disk, and a controller is disclosed, where the controller is configured to write a first force unit access write data to the cache as part of the cache data.
1
Patent
Disk drive evaluating laser performance for heat assisted magnetic recording
Galvin T. Chia,Prakash Balasubramaniam +1 more
- 11 Oct 2013
TL;DR: In this article, a disk drive is disclosed comprising a disk and a head comprising a laser configured to heat the disk while writing to the disk, and then the data is read from the disk to generate a read signal.
1
Patent
Data storage device attenuating thermal decay effect on fly height measurement
Kathy X. Tang,Jerry G. Le +1 more
- 23 Dec 2014
TL;DR: In this article, a data storage device is disclosed comprising a head actuated over a disk and a second spacing pattern is written to the disk different from the first spacing pattern, and a change in the fly height of the head is estimated based on: (ΔFHM2−B· ΔFHM1)/(A−B) where A and B are constants.
1
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