I have basic understanding of disk. (Please correct me if i am wrong) I understand on 1 platter, there are 2 heads, 1 on top, and 1 on bottom. Both side of the platter is able to provide storage ? On the platter, there are many tracks being broken up into the smallest unit of storage = sector. Corresponding tracks across all the platters = cylinder.
In OS, a block/cluster can be 1 or more sector
This is my output of fdisk -l
Disk /dev/sda: 107.4 GB, 107374182400 bytes
255 heads, 63 sectors/track, 13054 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0000d866
From the output, can i say that there are
q1) is there a total of 13054 tracks per platter then ? since there are 13054 cylinders ?
q2) there are 2 sides to a platter, does a track or sector applies to 1 side of a platter or both sides ? (e.g. if there is 1 track on platter, does it literally means 2 track, 1 on top and 1 below ?)
q3) what does the UNITS calculation represent ? Why isn't the total storage in a disk = no. of platter (not sure if top and bottom counts) * no of tracks per platter * no of sector per track * size of sector ?
q4) What does 255 heads means ?