[ale] Seagate Hdd Not Lining Up!? -- Diverging from the problem...

[Pat Regan]

Jim Kinney wrote:
> Every drive I've ever opened in the last 10 years had a single platter. I
> have not opened a SAS or newer SCSI drive yet. The really high throughput
> drives may actually have more platters/heads but I have yet to have the
> opportunity to ruin one with a screwdriver.

I've never opened a single platter desktop drive.  The only semi-modern
and popular single platter 3.5 inch form factor hard drive I know of is
the one that was used in the original xbox.  I would imagine 2.5 inch
form factor drives may  often have only one platter.

I remember a friend having a single platter desktop drive about 12+
years ago.  It was probably in the 100-200 meg range, and I think it was
a Quantum drive.  It was the thinnest desktop drive I've ever seen.
Really slow, too :p.

IIRC, the last drive I took apart had, I believe, 3 platters.
Effectively that makes for 4 usable sides, there were no heads on the
outside.

A few years ago I dug up one of my old, old full height 5.25 inch SCSI
drives.  If it weren't for the extra huge hole in the middle of the
platters you might mistake them for CDs, until you pick them up at least
:p.  I don't remember exactly how many platters were in there, it was in
the 8-10 range, though.

The magnet in that drive is VERY powerful.  You could easily injure
yourself trying to separate those magnets from a piece of metal.  :)

Pat


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