On-Line Extraction of SCSI Disk Drive Parameters

[摘要] Sophisticated disk scheduling algorithms require accurate and detailed disk drive specifications, including information on mechanical delays, on-board caching and prefetching algorithms, command processing and protocol overheads, and logical-to-physical block mappings. Comprehensive disk models used in storage subsystem design require similar levels of detail. This report describes a suite of general-purpose techniques and algorithms for acquiring the necessary data from SCSI disks via the ANSI-standard interface. The accuracy of the extracted information is demonstrated by comparing the behavior of a configurable disk simulator against actual disk drive activity. Detailed measurements extracted from several SCSI disk drives are provided.

[发布机构] HP Development Company

[学科分类] 计算机科学（综合）

[关键词] SCSI disk drives;parameters;automatic measurement