Hi,
shevek wrote:
> > Shevek wrote:
>
> .... Even mailers don't understand my name doesn't start with a capital :(
It was not my mailer, I typed that sentence myself. I thought all
names start with capitals, simply because that is the convention for
names. Why do you want yours with a lower case first letter?
> > >I think it is the same reason as putting the boot sector on the outside of
> > >the disk (the widest circle). There is more magnetic space reserved for
> > >the sector, so it will be more secure.
> >
> > That's not true. A bigger gap doesn't mean the bytes inside sector get more
> > space, it only means they are surrounded by more space.
>
> Strange. I always thought of it as very logical that cd's have their first
> track on the inside:safer against (physical) damage. and disks have it on
> the outside: safer against magnetic damage.
The part about inner/outer circle position may be true. It sounds
logical to me anyway.
I was saying that the analogy with gaps was not correct. A gap
contains bytes just like sectors do, altough the values of the bytes are
not used to store data. Making gaps bigger doesn't change the amount
of magnetic disk surface reserved for one byte.
> Does anyone know the reason for putting it on the outside? Or did they
> just choose something?
>From experience I know that more errors occur on the "end" of a disk:
the higher numbered sectors are more likely to be damaged (CRC
errors, seek errors, that kind of thing).
Patrick wrote:
> Well, not quite.
> A diskdrive is based on CRV (or something, Constant Radial
> Velocity), which means the RPM's are always the same, like a
> record-player. The gap doesn't change if the head is at track 0 or
> at track 79. Thus, there IS more magnetic material passing the heads
> for one rotation (i.e. one track). The bitrate remains the same.
Yes, but gaps being wider or smaller doesn't affect the amount of
magnetic surface used for a bit.
Bye,
Maarten
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