CMOS Computers - Service and Support

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What is ADSL?

DSL (Digital Subscriber Line) is a technology used to carry high-speed data transmissions over the standard twisted-pair copper wires that connect to the telephone network. DSL technology allows you to use the phone line for ordinary voice or fax traffic at the same time as it is used for this high-speed data transmission.

Asymmetric Digital Subscriber Line (ADSL) is an asymmetrical data transmission technology with higher traffic rates downstream and lower traffic rates upstream.

ADSL is suitable for Internet users because information is usually downloaded more often than uploaded, such as when browsing the web or downloading files.

Your telephone line is connected to the exchange. However this is no guarantee that your physical phone line is up to scratch even your exchange supports ADSL. A conclusive test can only be done upon registering for a service.

Estimated number of shots per card. Numbers will vary depending on shot resolution settings.

Why Defragment?
Your computer's CPU is capable of 200 or 300 million operations a second, and memory is capable of 16.7 million operations per second, but even the fastest hard drives are capable of no more than 125 operations a second -- much slower than the memory and CPU. A contiguous file can be read by your program with a single disk access. A file fragmented into two pieces requires TWO accesses to get the same information. With files fragmented into two pieces on average, your disk operations is suddenly reduced to half the expected speed. Imagine a program trying to read information from a file fragmented into 125 pieces (not uncommon). It would take a WHOLE SECOND to read the same information that should only take 1/125th of a second.

If you step back and take a look at this in perspective, it really doesn't matter how fast your CPU is or how fast your memory is if that disk is fragmented. Every extra fragment (per file, average) is going to slow down that computer so much, the machine is set back a generation or two in terms of power. The obvious conclusion is that defragmenting your disks is the FIRST performance enhancement anyone should make. Because the disk is the slowest component and therefore the #1 potential bottleneck, the disk should be kept in peak operating condition at all times.