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- Path: sparky!uunet!mcsun!uknet!mucs!mccuts!zlsiial
- From: zlsiial@uts.mcc.ac.uk (A. V. Le Blanc)
- Newsgroups: comp.os.linux
- Subject: Re: Odd number of sectors???
- Message-ID: <5731@mccuts.uts.mcc.ac.uk>
- Date: 1 Sep 92 07:39:59 GMT
- References: <COSC16TT.92Aug31165735@menudo.uh.edu>
- Reply-To: LeBlanc@mcc.ac.uk (A. V. Le Blanc)
- Organization: Computing Centre, University of Manchester
- Lines: 21
-
- In article <COSC16TT.92Aug31165735@menudo.uh.edu> DGray@uh.edu writes:
- >During the installation script linux says to make a partition. It
- >asks for the first cyl (says "(1-820)") and I tell it 1. It then asks
- >for the last cyl (says "enter last cyl or +size +sizeM +sizeK
- >(1-820)") and I tell it 820. It says "Warning: partition 1 has an odd
- >number of sectors". It says this no matter what I put for the last cyl.
-
- Let us assume that your disk has an even number of sectors per cylinder.
- In partition 1, the first sector of the first cylinder is taken up by
- the Master Boot Record and the primary partition table. Therefore
- cylinder 1 contains an odd number of available sectors. Each other
- cylinder contains an even number of sectors. Therefore, any range
- of cylinders beginning with 1 will contain an odd number of available
- sectors. Now fdisk by default rounds any number you suggest to the
- nearest cylinder boundary. Now do you see what is happening?
-
- It shouldn't really be a problem; more than 512 bytes is wasted in
- one way or another in most installations.
-
- -- Owen
- LeBlanc@mcc.ac.uk
-