🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: comp.os.msdos.programmer
Article #3711

Re: Floppy Disk 1:1 interleave ?

#3711
From: Jerzy Tarasiuk
Date: Fri, 09 Oct 1992 12:16
10 lines
1120 bytes
>>>>> On Tue, 6 Oct 1992 06:29:45 GMT, bmtong@cucs11.cs.cuhk.hk (Tong Bo-Ming) said:
Tong> 	It seems to me that DOS format disks with 1:1 interleave.  When I
Tong> call BIOS to read a chunk of disk sectors, it is so fast !  Is this
Tong> true ?

Yes. If you read disk using DOS, it is fast, too (if file is contiguous).
However, I found UNIX floppy disk driver cannot handle 1:1 at full speed
- before it is ready to read next sector, more than 4 sectors pass...
Therefore, UNIX works best if you use interleave 1:6, DOS is better :^).
(tested for Interactive UNIX System V, on 16/20 MHz 386 based machine).
Technical Details
Message-ID: <JT.92Oct9131605@fizyk1.fuw.edu.pl>
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!fuw.edu.pl!cocos!jt
References: <1992Oct6.062945.7158@cucs5.cs.cuhk.hk>

Show Full Headers
Complete Article Headers
Newsgroups: comp.os.msdos.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sunic!fuw.edu.pl!cocos!jt
From: jt@fuw.edu.pl (Jerzy Tarasiuk)
Subject: Re: Floppy Disk 1:1 interleave ?
In-Reply-To: bmtong@cucs11.cs.cuhk.hk's message of Tue, 6 Oct 1992 06:29:45 GMT
Message-ID: <JT.92Oct9131605@fizyk1.fuw.edu.pl>
Sender: news@fuw.edu.pl
Nntp-Posting-Host: fizyk1
Organization: Warsaw University Physics Dept.
References: <1992Oct6.062945.7158@cucs5.cs.cuhk.hk>
Date: Fri, 9 Oct 1992 12:16:05 GMT
Lines: 10