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Re: why 63 ?

From: Andrew Clausen
Subject: Re: why 63 ?
Date: Wed, 23 Feb 2005 13:11:02 +1100
User-agent: Mutt/1.3.28i

On Wed, Feb 23, 2005 at 10:00:01AM +0100, SEVAUX Gence ROSI/DPS DPS wrote:
> good morning,
> I look for information about linux partitionning, since our storage
> vendor says we can meet disk alignment issues. Now, i begin to
> understand that, because first data partition start on sector 63 and
> usually the boundaries of tracks, stripes are rather a 64 multiplier.
> But, for other disk the CHS geometry can be different (for instance 32
> sectors by tracks). To increase my own knowledge, may you tell me the
> history of this number 63 ?

I don't know the history.  I can only assume that 50 years ago, some
intern made the decision to choose 63 rather than 64 without telling
anyone.  A billion people have been stuck with it ever since.  I am as
mystified as you are.  I can think of more horrendous mistakes in
human history, though :p


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