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公开(公告)号：JP2000132507A
公开(公告)日：2000-05-12
申请号：JP30526998
申请日：1998-10-27
Applicant: IBM
Inventor： INOUE KAZUNORI , FUKUHISA RYOJI , NAKAMURA YASUHIRO , ISHIBASHI KAZUYUKI , SAITO HIROSHI
Abstract: PROBLEM TO BE SOLVED: To provide a command processing method which is used for an SCSI (small computer system interface) protocol and can improve the system throughput and also to provide a device that can be used for the command processing method. SOLUTION: This command processing method is applied to the queuing with a tag having >=2 queue depth of an SCSI protocol. When the continuous write commands are processed, the end of each write command is detected and a response is returned to a host to notify the end of the writing. If the new commands which can be continuously processed are received against a command that is currently processed, the received new commands are added to the command under processing to dynamically extend the internal processing information. Thus, the received commands are executed continuously to the command under processing. In such a constitution, the system throughput can be improved.
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公开(公告)号：JPH08185271A
公开(公告)日：1996-07-16
申请号：JP32471594
申请日：1994-12-27
Applicant: IBM
Inventor： KIGAMI YUJI , YAMADA MITSUHARU , KANAI TOSHIO , ISHIBASHI KAZUYUKI
Abstract: PURPOSE: To efficiently and simply process the input/output of data at a high speed. CONSTITUTION: Request signals from a host computer 32 are inputted through the I/O 42 of an HDC 30 to a segment handier 36. The segment handier 36 refers to a segment table stored in a table memory 44, selects a segment, sets a segment memory 46 divided into the plural segments through a memory manager 38 and transfers the data to a disk part 11. In the segment handier 36, rules based on the principle of mutual exclusion are stored and determined beforehand and the data are held so as not to overlap the data of the same sector inside the segment memory 46 for the respective segments.
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