Article View: comp.sys.amiga.tech
Article #10598Re: Faster File Systems
From: Scott Henry
Date: Thu, 15 Dec 1988 16:56
Date: Thu, 15 Dec 1988 16:56
29 lines
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1891 bytes
From article <65@microsoft.UUCP>, by w-colinp@microsoft.UUCP (Colin Plumb):
> I realise it's pretty obvious, but just in case I confused anybody when
> describing how adding data to extent "c" in a track packed like so:
> aaaaabbcccddddeeeeee----------ff would result in its being repacked as
> aaaaabbccc----------fddddeeeeeef, that was a typo. It should have been
> aaaaabbccc----------ddddeeeeeeff, with f staying where it was. Sorry.
>
> P.S. I've received a few replies, but so far it seems as if I'm the best FS
> designer in this newsgroup. Isn't anyone going to prove I'm not? :-)
> Really, there must be *something* wrong, or the Amiga wouldn't have been
> designed with sectors in the first place.
> --
> -Colin (uunet!microsof!w-colinp)
The biggest problem that I see with your scheme is that it will only work
with floppy disks (hard disks need not apply). The hard disks that I am aware
of know about sectors (frequently, in the case of SCSI, in the drive itself).
OFS works fine on HD's, but your scheme would need a separate file system
for HD's. I know of (at least) one extent-based HD file system (Silicon
Graphics uses one), but it uses sectors as the level of granularity (this
is all I know about it!, except that it is very fast).
Scott Henry
<scotth@sgi.com>
#include <std/disclaimer.h>
--
Scott Henry <scotth@harlie.sgi.com> {or, also on the Internet:}
<skywalker@cup.portal.com>
#include <std_disclaimer.h>
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-tis!ames!sgi!scotth@harlie.SGI.COM From: scotth@harlie.SGI.COM (Scott Henry) Newsgroups: comp.sys.amiga.tech Subject: Re: Faster File Systems Message-ID: <23498@sgi.SGI.COM> Date: 15 Dec 88 16:56:01 GMT References: <65@microsoft.UUCP> Sender: daemon@sgi.SGI.COM Organization: Silicon Graphics, Inc., Mountain View, CA Lines: 28