Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2005-10-18
2005-10-18
Padmanabhan, Mano (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C111S112000, C111S113000, C111S137000, C111S144000, C111S158000, C111S200000, C111S200000
Reexamination Certificate
active
06957300
ABSTRACT:
Method and apparatus for transferring data between a host device and a data storage device having a first memory space and a second memory space. The host issues access commands to store and retrieve data. The device stores commands in the first memory space pending transfer to the second memory space. An interface circuit evaluates relative proximity of first and second sets of LBAs associated with pending first and second commands, and delays promotion of later pending commands in front of earlier pending commands during an overlap condition. If the overlap is caused by performance enhancing features (PEF) the PEFs are disabled so the commands can be scheduled for disc access. Indicators are set in the commands to signal that a PEF has caused the overlap and that PEF can be disabled. Values are added to indicators in the commands such that the PEFs can be modified and avoid overlaps.
REFERENCES:
patent: 5623608 (1997-04-01), Ng
patent: 5745732 (1998-04-01), Cherukuri et al.
patent: 5758153 (1998-05-01), Atsatt et al.
patent: 5983319 (1999-11-01), Ito
patent: 6263408 (2001-07-01), Anderson et al.
patent: 6487599 (2002-11-01), Smith et al.
patent: 2003/0204675 (2003-10-01), Dover et al.
Coker Kenny T.
Hertz Mark D.
Mobley Jack A.
Olds Edwin S.
Fellers , Snider, et al.
Namazi Mehdi
Padmanabhan Mano
Seagate Technology LLC
LandOfFree
Reducing delay of command completion due to overlap condition does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reducing delay of command completion due to overlap condition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing delay of command completion due to overlap condition will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3470214