Posted by Unknown | Posted in Windows | Posted on 12:21 PM
Cylinders And Partitions
First of all, let's take a look at a hard disk cylinder. A cylinder consists of the same tracks on all the platters in the hard disk.
The first cylinder, nominally called cylinder 0, is coloured in bright green. It is the outer most cylinder and consists of the first track of all the platters in the hard disk. Such groups of tracks have a cylindrical look, hence the name. Cylinder n (in red) is the last cylinder of the hard disk, where n can be any integer.
Partitions are constructed using full cylinders. The first one starts at cylinder 0 and go out to where you specify. The next one starts on the following cylinder, and so on. If you try to create a partition with an end that falls in the middle of the cylinder, FDISK or similar utilities will round it up so that the partition occupies the entire cylinder, instead of a partial cylinder.
Needless to say, the first partition will always start with the first track of every platter. In other words, the first partition will always be the fastest partition in the hard disk, followed by the second partition and so on. Therefore, if you create a second partition and dump the paging file there, you will actually be moving it to a slower part of your hard disk!
As you can see, while the temporary paging file will be remain contiguous using this technique, the transfer of the paging file from the outer tracks to the inner tracks of the hard disk will inevitably reduce its performance.
First of all, let's take a look at a hard disk cylinder. A cylinder consists of the same tracks on all the platters in the hard disk.
The first cylinder, nominally called cylinder 0, is coloured in bright green. It is the outer most cylinder and consists of the first track of all the platters in the hard disk. Such groups of tracks have a cylindrical look, hence the name. Cylinder n (in red) is the last cylinder of the hard disk, where n can be any integer.
Partitions are constructed using full cylinders. The first one starts at cylinder 0 and go out to where you specify. The next one starts on the following cylinder, and so on. If you try to create a partition with an end that falls in the middle of the cylinder, FDISK or similar utilities will round it up so that the partition occupies the entire cylinder, instead of a partial cylinder.
Needless to say, the first partition will always start with the first track of every platter. In other words, the first partition will always be the fastest partition in the hard disk, followed by the second partition and so on. Therefore, if you create a second partition and dump the paging file there, you will actually be moving it to a slower part of your hard disk!
As you can see, while the temporary paging file will be remain contiguous using this technique, the transfer of the paging file from the outer tracks to the inner tracks of the hard disk will inevitably reduce its performance.
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