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From: woju@mist.sub.org (Wolfgang Jung)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Big logical sectors and their effect
Message-ID: <A0axp4km@mist.sub.org>
Date: 15 Dec 90 11:43:00 GMT
References: <1990Dec13.141210.26853@wam.umd.edu>
Reply-To: woju@mist.sub.org
Distribution: comp
Organization: The Mystic System in Berlin 26
Lines: 37
X-Version: Martin's Mailer Version Dec 03 1990 23:55:06

In <1990Dec13.141210.26853@wam.umd.edu>, David M. Baggett writes:
-<
-<What effect does changing the logical sector size have on the system?
-<Does it increase minimal file size?  E.g., if I create a 10 byte file,
-<will it take up 8K on the disk, since the sector is the smallest
-<unit of space that can be allocated?

When you use 8K Clusters for the GEMDOS Filessystem, the filesystem will
allocate 8K as MINIMUM for this File and the FS will take more Memory
of YOUR HD in 8K Blocks

-<Will a large sector size decrease performance?  Confuse applications
-<of any kind?  

With small Files <4K the performance will decrease, but with Files somehow
ending with a filled 8K Block, it could increase performance, for a 160K
File there is only a need of 20 Clusters instead of 160 Clusters with 
standard Clusters..(1 K ) the increase/decrease depends on the Files

Many logical Speedcheck Programs are using 64K Blocks for read and write
Speedtests, if they test the FILESYSTEMSPEED they should say SPEEDY FS, 
because the FS only searches for 8 Clusters, which should be faster
than searching for 64 Clusters on your harddiskpart....



	Wolfgang Jung

-- 
Bye,...
Don't trust your eyes. It's just an imagination of your brain !

woju@mist.sub.org
woju@image.in-berlin.de
woju@neon.in-berlin.de

(c) by Wolfgang Jung, Berlin (date look at header !!)