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echo: os2dos
to: TIM TAYLOR
from: JOHN THOMPSON
date: 1996-11-19 16:10:00
subject: Defrag

TT> The file "EA DATA. SF" gets very fragmented, this is the way OS/2
TT> stores the EA's on a fat drive. OS/2 puts the EA data wherever the
TT> heads on your harddrive happen to be at the time. This is usally by
TT> the file they are ment for. BUT, when you defrag your fat drive the EA
TT> file is EVERYWHERE and really causes a big slowdown. On one of my
TT> systems here a defrag of this file speeded up disk access by 3 times.
Actually, "EA DATA. SF" is intentionally fragmented to keep the 
EA's physically close to the files they are associated with.  In 
HPFS this happens automatically, but in FAT OS/2 has to do some 
tricks to approximate the same thing.  OS/2's implementation of
FAT (called "SuperFAT") is designed to operate that way; the EA's
aren't simply written to the disk "wherever the heads on your
harddrive happen to be at the time."
 * KWQ/2 1.2i * Internet: John.Thompson@ibm.net
--- OS/2 Warp\FastEcho\FD\ProBoard
(1:139/655)
---------------
* Origin: The Future Generation BBS*(414)739-8242*Supra 2400-33.6k

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