E
Eric Gisin
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Eric Gisin said:OK.
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Rod Reaugh said:Ignore the known troll and wacko.
J. Clarke said:Manny wrote:
At one time there was a separate platter with the servo
tracks, so it was possible for temperature changes to
alter the head positions slightly relative to the data
tracks. That is no longer the case, each platter has
its own servo information stored.
Since there is a large hole in the top of the drive until
such time as the factory decides to put the lid on that is
not an issue. Regardless, there is really no separate
"servo-writer" that is inserted into the drive--the heads
that are shipped with it are used for servo writing, but
positioned by an external device at the factory.
You don't "calibrate against that one servo". You calibrate
against the data tracks and then use the calculated offset.
The servos are written using the drive heads. The servo writer inserts oneManny said:I have to confess ignorance abou HDs and didn't know that
this was now the practice for servo writing, but I read that
newer Hitachi-IBM HDs could write their own servos, even
without external electronics, but I thought the usual practice
was to insert a servo writer through a hole. I've seen drives
with a fairly large taped-over hole on the bottom for this,
but it's usually a small hole on the side. If this hole isn't
for servo writing, then what is it for?
Manny said:I have to confess ignorance abou HDs and didn't know that
this was now the practice for servo writing, but I read that
newer Hitachi-IBM HDs could write their own servos, even
without external electronics, but I thought the usual practice
was to insert a servo writer through a hole. I've seen drives
with a fairly large taped-over hole on the bottom for this,
but it's usually a small hole on the side. If this hole isn't
for servo writing, then what is it for?
Is there an offset because separate heads are used for reads
and writes?
Bob I said:Only if you stored it in a freezer at 30 below zero. Think about it, if
it made a real difference you wouldn't be able to boot from the drive
until it warmed UP!
If this was necessary, the drive might not work when you
turned the computer on every morning. You'd have to let it
spin for 15 minutes and then try to boot up.
Ken said:There are difference between not working and working near the limit.
No its a stupid idea, following your logic you would need to
power up your harddrive for 30 minutes everytime you booted up.
That idea is insane
Norm De Plume said:"terry smith" <[email protected]> wrote in message
I always warm the hard drive to body temperature before using it.
Norm De Plume said:I always warm the hard drive to body temperature before using it.
Dear Doctorterry smith <[email protected]> said:Yes I would imagine it feels more like the real thing that way.
Roger Hunt said:Dear Doctor
I seem to have data retention problems with my arse ...
Norm De Plume said:I always warm the hard drive to body temperature before using it.
Just an aside here, but, a well known disc array manufacturer, IBM,Anonymous said:The *only* time I notice that *some* hard drives are prone to errors is if
they are very cold. Like been shut off for a day in a 50F room. They need
to be warmed up before you can use them, but this isn't with all drives, and
it doesn't take 30 minutes. Maybe 4 reboots (as they most likely will give
one of those clicks that are bad, and you reboot just out of fear and it
gets to working normally. Then you have to find a way to keep the case or
room warm. This is how my 60GB Maxtor used to behave, well, it still does
but it is in an older PC now so I don't deal wit it much. It has been
replaced by dual 120GB Seagate 7200RPM 8MB cache in RAID0
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