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Does anyone know the exact 3 system files that format c:/s puts on your hard drive to make it bootable?

It depends on what boot Disk you are using and your chosen File system. NTFS or FAT32.
http://www.sightsea.com/PghPcHd/pag...
There is nothing to learn from someone who already agrees with you.

Perhaps are you asking about IO.SYS, MSDOS.SYS and COMMAND.COM that existed in MS-DOS. As explained above neither the files nor the command is valid for XP.
Nigel
This is just a sig

Yes, I believe those are the files I was looking for. I have an instructor who asked the question: FORMAT C:/S command puts three files on the partition to make it bootable. What are their names? I have had a difficult time trying to find the answer becuase I have an XP and a Vista machine but neither of those recognize the command and when you put in the ? mark neither machine in DOS comes up with a /S for an option. I have done this before a long long time ago just couldn't remember the file names. Thanks for the help.

What is an instructor doing asking for MS-DOS commands in this day and age. MS-DOS is obsolete, dead, buried, history. No relevance at all since the demise of Windows 98.
Stuart

Good Question. It is just a beginning computer hardware class and I believe the instructor is having us learn some old stuff just in case we future IT guys run into some old hardware along the way. Otherwise not sure.

The format '/s' option was removed when WinME came into existence.
In the old Win9X days, in addition to the IO.SYS, MSDOS.SYS and COMMAND.COM files, the partition boot sector had to be set up.
(edit) Of course, the partition boot sector still has to be setup these days. :-)

Good Question. It is just a beginning computer hardware class and I believe the instructor is having us learn some old stuff just in case we future IT guys run into some old hardware along the way. Otherwise not sure.
Probably from the same school of instructors that I came across in the late 1980s. Spent days teaching us about about magnetic core memory and punch cards. Spent a whole day going on about the wonders of MS-BASIC. He was a bit put out when I told him I had been using MS-BASIC since 1978.
Stuart

You're very welcome, John. Maybe if you mention the partition boot sector (AKA Volume Boot Record), you will get extra credit. ;-)

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