On Thu, Jun 04, 2009 at 12:21:02AM +0200, Goswin von Brederlow wrote: .....mi > > Anyone know what the size of a track is on modern disks? How many > sectors/track do they have? The number will differ from the inside to the outside of the disk. The number of zones will differ from drive to drive too.... Some diagnostic software will either know this or have vendor specific ways to get it live from the disk. Data sheets now report average... At one time vendors made a big deal on this... http://www.impediment.com/seagate/s2000/spec_318436lcv.shtml Sectors/Track (avg) 426 Bytes/Track (avg) 218,112 If you take numbers like: Track Density (TPI) 18,145 tracks/inch Recording Density (BPI, max) 328,272 bits/inch and dust off some geometry you might discover how many more bits are possible on the outside tracks vs the inside tracks and then take those bits and estimate the number of additional blocks. An estimate may all you get because spares and other uses for bits will be hidden. -- T o m M i t c h e l l Found me a new hat, now what? -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
