View Single Post
Old 30 December 2016, 20:02   #8
thomas
Registered User
thomas's Avatar
 
Join Date: Jan 2002
Location: Germany
Posts: 5,510
Quote:
Originally Posted by meynaf View Post
Cylinders are also called Tracks
Yes and no.

Actually it is like this: harddisks are made of several disks, each disk has two surfaces and each surface needs a head to be accessed.

Now the surfaces are devided into tracks and the collection of the same track on all surfaces makes up a cylinder.

For example on a floppy disk, track #5 on the upper side plus track #5 on the lower side make up cylinder #5.

That said, the whole geometry is irrelevant nowadays. All you need to know is

"sectors" = sectors per track
"heads" = tracks per cylinder
sectors * heads = sectors per cylinder
sectors per cyliner * cylinders = total number of sectors
total number of sectors * sectors size = capacity of the harddisk

While geometry is irrelevant, the number of sectors per cylinder still matters because partitions can only be defined on cylinder boundaries.

And if you make a clever selection for the cylinder size you can automatically align partitions for example on megabyte boundaries (which might be useful for SSDs).
thomas is offline  
 
Page generated in 0.05881 seconds with 9 queries