Messages in this thread | | | From | Mirian Crzig Lennox <> | Subject | Re: atomicity | Date | 07 Dec 1998 13:30:28 -0500 |
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alan@lxorguk.ukuu.org.uk (Alan Cox) writes: > > > > not useful anymore. With modern disks, chances are excellent that the > > specific 3D geometry the file system sees is an utter fiction, and > > that cylinder locality is thus more-or-less a meaningless concept. > > If it was meaningless then things like sorting write queues would also > be pointless. Its certainly true that the 3D information is less than > useful nowdays. Its not however true that relative distance (in time) > between sectors is not strongly proportional to the difference in sector > numbers, or that reading sectors is order of sequentional logical number > isnt a good thing
Aha! I think I get it.
Even though cyl groups are a fiction, they're no worse than any other arbitrary grouping of sectors, so why not use them and let the disk controller hardware do the maths instead of the kernel. Clever.
-- Mirian Crzig Lennox Systems Anarchist "There's a New World Order coming every minute. Make mine extra cheese."
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