Title:
METHOD AND APPARATUS FOR SYNCHRONIZING DATA FROM ASYNCHRONOUS DISK DRIVE DATA TRANSFERS
Document Type and Number:
WIPO Patent Application WO2004092942
Kind Code:
A3
Abstract:
Method and apparatus to effect synchronous data transfers in a disk controller, for example to and from a common buffer (52), when the data transfers to and from the individual disk drives (12,20) are actually asynchronous. A FIFO memory (26,28) is provided in the controller for each disk drive. Asynchronous data transfers between each drive and the corresponding FIFO use the timing provided by the respective drive (interfaces 16,24); whereas data transfers on the buffer side of the FIFOs (46,48) are effected synchronously (44,72). The availability of synchronous data transfers enables "on the fly" generation of redundancy information (FIG. 3) (in the disk write direction) and "on the fly" regeneration of missing data in the read direction (FIG. 4).
Inventors:
STOLOWITZ MICHAEL C (US)
Application Number:
PCT/US2004/011021
Publication Date:
May 26, 2005
Filing Date:
April 08, 2004
Export Citation:
Assignee:
NETCELL CORP (US)
STOLOWITZ MICHAEL C (US)
STOLOWITZ MICHAEL C (US)
International Classes:
G06F3/06; G06F11/10; (IPC1-7): G06F3/06
Foreign References:
| US5765186A | 1998-06-09 | |||
| US5608891A | 1997-03-04 | |||
| US5072378A | 1991-12-10 | |||
| US6237052B1 | 2001-05-22 |
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