Observing the effects of multi-zone disks
作者： Rodney Van Meter
DOI:
关键词: Side effect (computer science) 、 Computer science 、 Transfer (computing) 、 Disk sector 、 Hard disk drive performance characteristics 、 Real-time computing 、 Current (fluid) 、 Constant angular velocity 、 File system 、 Mechanics 、 Track (disk drive)
摘要: Current generations of hard disk drives use a technique known as zoned constant angular velocity (ZCAV), taking advantage the geometry to increase total capacity by varying number sectors per track with distance from spindle. A side effect this is that transfer rate also varies sector address. We analytically estimated and measured on file system performance BSD Fast File System, showing drop roughly 25% in peak depending head position. show that, while ZCAV effects cannot be ignored, simple linear model adequately estimates few parameters normally available drive spec sheets.
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