Several companies make hard drives. Seagate is the biggest name now, but Fujitsu, Toshiba and some smaller ones make drives also.
No. That doesn't make any sense. A URL is a locator that points to a resource (hence the name Uniform Resource Locator) which can be on a hard drive - is that what you mean?
Hewlett-Packard Development Company or HP makes several models of hard drives. The type of hard drive depends on the usage. HP makes SAS Hard Drives which is a middle of the road drive. HP also produces the SATA Hard Drive which is an entry level drive and the HP Solid State Drive which is meant for unrestricted workload applications.
Sounds like a scam - got any links?
The easiest way to make an internal hard drive portable is to purchase what's called a hard drive enclosure. Hard drive enclosures are kits that have everything you need to make your own portable hard drive. Make sure you get a hard drive enclosure that matches the size and interface type as your hard drive, as well as the means of connectivity that you wish. As an example, you can have a 3.5" IDE hard drive enclosure that connects to your computer with a USB cable. Most computer stores have hard drive enclosure. The best place to get one is probably tigerdirect.com. There are many of them available on eBay.
If a hard drive is clicking then a person should make a decision to try and back up or recover any files on the hard drive. Files on the hard drive can be recovered by using professional hard drive recovery systems.
no
The main drive is the drive with your operating system on it.
The hard drive cache is used when accessing files on your hard drive and a larger cache does improve file operation speeds.
disk cloning or dist imaging.
yes , Promise Technologies makes good hard drive cases
A larger hard drive will increase the overall speed and performance of your computer.
Some hard drive perfomance can be improved through special utilities. Check the manufacture website for such software. I know that Western Digital has software to check and fix your hard drive.