ot: low level format

[Snehulak]

Ja si to myslel taky . Mam pocit, ze tam uz je ponekud slozitejsi nastaveni
nez u starych disku kde se nastavovalo snad jen poradi sektoru a
pod.Aleutilito na to existuji treba na
www.slunecnice.cz nebo www.stahuj.cz ale podle tady toho to u modernejsich
disku nema zadny smysl.

If you've explored other areas of this material describing hard disks, you
have learned that modern hard disks are much more precisely designed and
built, and much more complicated than older disks. Older disks had the same
number of sectors per track, and did not use dedicated controllers. It was
necessary for the external controller to do the low-level format, and quite
easy to describe the geometry
<http://www.pcguide.com/ref/hdd/geom/geom.htm>of the drive to the
controller so it could do the LLF. Newer disks use many
complex internal structures, including zoned bit
recording<http://www.pcguide.com/ref/hdd/geom/tracks_ZBR.htm>to put
more sectors on the outer tracks than the inner ones, and embedded
servo <http://www.pcguide.com/ref/hdd/op/act_Servo.htm> data to control the
head actuator. They also transparently map out bad
sectors<http://www.pcguide.com/ref/hdd/geom/error_Mapping.htm>.
Due to this complexity, all modern hard disks are low-level formatted at the
factory for the life of the drive. There's no way for the PC to do an LLF on
a modern IDE/ATA or
SCSI<http://www.pcguide.com/ref/hdd/geom/formatLow-c.html#>hard disk,
and there's no reason to try to do so.

snehulak


> Hmm.. a ja myslel, ze low-level format uz na "novejsi disky" (tj. tak 5 a
> vice
> let zpet??) "nefunguje"...
>
>
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