Patent
1995-12-06
1999-01-19
Trans, Vincent N.
39518305, G06F 722
Patent
active
058623639
ABSTRACT:
One CKD track on a direct-access storage device is divided into a plurality of fixed-length FBA blocks, only a home address HA of the CKD track and a record R0 having a CKD format are recorded in the leading FBA block, and each field (a COUNT field, KEY field and DATA field) of records R1, R2, . . . having the CKD format is recorded in the other FBA blocks. This arrangement is such that even if a format-write processing instruction for format-write from the record R1 is received from a host device, a disk control unit will not read the FBA block of HA/R0 out to a cache memory and will read out only FBA blocks from record R1 onward. As a consequence, write processing from record R1 onward can be performed in memory with ease and format-write processing can be executed at high speed.
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Takatsu Kazuma
Tanaka Keishichiro
Taroda Yuichi
Fiul Dan
Fujitsu Limited
Trans Vincent N.
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