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Both offer fast data transfer, but the SCSI models revolve at a rate faster and therefore it is faster in sending and receiving data. If you are not convinced, visit James Dondero. It is very common to find a SCSI hard disk on a server instead of a desktop PC. Their higher speeds data and error correction capabilities make them perfect to use as part of a set of disks. SCSI type is considered more reliable, but they also tend to wear out more quickly due to the high speed than disks rotate. SSD (Solid State Drives) solid state, is a term used to refer to electronic components constructed entirely of semiconductors. In simple terms? SSD gets rid of the magnetic storage (disk that we saw in the first) to give us a solid storage, without moving parts.

In fact, the SSD and our typical USB share many similarities, because storage chips they use are the same or very similar: the difference is in the shape of the disc (adapted to the current of 2.5 or 3.5 to be able to fit in, for example, a laptop), and capacity. Now, while we are at a stage in which the SSD are still too expensive compared to the ancient technology, with the quick fall of the cost of production and multiplication in storage, I am of those who believe that it won’t be much longer, so SSDS are commonplace. Just to see netbooks, because in many these, you opt for this type of storage, instead of traditional hard drives. SAS (Serial Attached SCSI Drive) (Serial Attached SCSI or SAS). Bus technology of computers designed primarily for data transfer or from storage devices (such as hard disks, CD-ROM, etc.). It is considered the successor to parallel SCSI. The main difference from its predecessor is that it uses serial transfer of data, increased speed to 1.5 3 or 6 Gbps.

allows for greater speed in transferring data, hot-pluggable, has compatibility with Serial ATA hard drives because they use the same connector (on the other hand a Serial ATA controller not recognized SAS hard drives). SAS supports a high number of connected devices, in theory more than 16,384 devices. In contrast the parallel SCSI is limited to 8, 16 or 32 devices. The SAS are especially used in servers that need high performance.

Within a few days with regular use of active absorbent surface of the carbon filters covered with a layer of the filtrate , airborne dust and at room temperature becomes a breeding ground in which breeding and various kinds of bacteria and microorganisms. Manufacturers of filters are in no hurry to explain to customers that "the huge emissions of 'bacteria 5-7 days after the commencement of operation of the new filter – a very common phenomenon. Accumulated inside the sorbent elements of the dirt and brought up on them all sorts of bacteria colonies at any time digging out. Must also take into account that most filters are not designed for our tap water with a constantly changing chemical composition. In this connection, the complexity of determining the moment when the filter element generates the resource itself becomes a source of danger. Activated carbon – the basic component of almost any water purification system. Often it is administered components, saturating the water with silver ions, and in commercial advertising is, of course, is presented as a virtue.

Previously it was thought that silver disinfects water. It is alleged kills bacteria by their ions. We used silver utensils, silver spoons. In fact, silver is only inhibits the growth of bacteria. And once they get into the environment with a lower concentration of silver ions, they again begin to actively proliferate.

Prolonged use of silver for the disinfection of drinking water is simply unacceptable, it leads to the accumulation of heavy metal ions in the body, the consequences of which can be serious diseases of internal organs. Carbon tapes and liners for the filters to clean water is required to regularly change, because coal is clogged and loses its cleaning ability. Then the water just goes around coal, and without any treatment is flowing over its surface, which has already taken care of all that I could. Thus, household water-purifying filter itself becomes a source of water contamination. Summarizing the above, we can confidently say: Our tap water is, in essence, water technology. For many indicators of such water is dangerous for drinking and cooking, and only tactical considerations do not allow regional administrations formally give tap water that rightfully belongs to her status.