That's quite right. But in all Macs with a built-in drive, there are really more differences between 400 and 800 Kb disks (because of the different filesystem and the inability of certain OSes of using only one side of the disk) than between 800 Kb and 1.44 Mb disks (because all Apple internal drives are prepared to read/write variable-speed 400/800 Kb disks without problem). I do know that I can not read or write 400 or 800 Kb disks on any PC (and it's troublesome for me, because I'm mainly a PC user with some Apples in my collection, including some not 1.44 Mb-capable). But we are talking about Macs, right? :-)

Greetings,

Antonio Rodríguez (Grijan)
<ftp://grijan.cjb.net:21000/>

[EMAIL PROTECTED] escribió:

   A bit of clarification, if I may.  From a logical standpoint, 400KB disks
are different than 800KB diskettes.  The former are Macintosh File System (MFS)
while the latter are Hierarchial File System (HFS).  But from a physical
standpoint, they are quite similar.  The 400KB diskette is single sided, the
800KB diskette is double sided, but they use the same recording method.
   Although 800KB and 1.44MB diskettes are logically similar, in that they both
are HFS diskettes, they use different physical recording methods.  As a result,
1.44MB HFS diskettes can be accessed on Windoze systems, with the proper
programming (i. e., Transmac), but 800K Mac diskettes cannot.

Willi



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