Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2005-08-02
2005-08-02
Padmanabhan, Mano (Department: 2188)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711S112000, C360S048000
Reexamination Certificate
active
06925526
ABSTRACT:
Write operations less than full block size (short block writes) are internally accumulated while being written to disk in a temporary cache location. Once written to the cache location, the disk drive signals the host that the write operation has completed. Accumulation of short block writes in the drive is transparent to the host and does not present an exposure of data loss. The accumulation of a significant number of short block write operations in the queue make it possible to perform read/modify/write operations with a greater efficiency. In operation, the drive preferably cycles between operation in the cache location and the larger data block area to achieve efficient use of the cache and efficient selection of data access operations. In one embodiment, a portion of the disk surface is formatted at a smaller block size for use by legacy software.
REFERENCES:
patent: 5341361 (1994-08-01), Hosaka
patent: 5517632 (1996-05-01), Matsumoto et al.
patent: 5813025 (1998-09-01), Murphy et al.
patent: 6145052 (2000-11-01), Howe et al.
patent: 6278566 (2001-08-01), Blumenau
patent: 6378037 (2002-04-01), Hall
patent: WO 9422134 (1994-09-01), None
Provisional U.S. Appl. No. 60/333,963, filed Nov. 27, 2001, Zhang et al.
Hans-Peter Messmer, The Indispensable PC Hardware Book, 2nd ed., Addison-Wesley Publishing Co. Inc., 1995, pp 732-733 and 744-746.
Padmanabhan Mano
Ross John M.
Truelson Roy W.
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