What is it?
When it comes to your NAS, we are really referring to a network device (a separate device) that contains multiple hard drives to store information. You have the ability to manage the data from these records to gain speed and data security, along with high performance communication.
What I am seeing more and more on advertising for the home user, are devices designed for home networks or small businesses. There are also professional high performance devices which, although governed by the same principles have other capabilities and features.
It facilitates access to this data using different technologies such as FTP, itunes, torrent ... This allows easy use from any other network device we have, such as an Ipod
Store information
The capacity is determined by both the number and size of the disks containing at the same settings. In small devices typically have up to two hard drives and security settings in RAID1 (mirrored disks)
I mean, we have a two-disk NAS 1 TB hard drives, which would give us 2 TB of capacity, but can be configured as RAID 1 or mirror, to get an exact copy of data on a disc in the other. In this case the capacity is 1 TB NAS (a data disk and one backup)
To clarify what the units look at the link http://dunbit.blogspot.com/2009/ 07/megas-gigas-teras-que-follon-de.html
Communications
As important as having a high data capacity, is to have a good communication. Normally the home NAS have a network card to 1 Gbps (1000 Mbps) allows high transfer data.
usually find in professional devices for fiber optic connections to increase their performance.
They can also have one or more USB ports to manage the NAS or to add flash drives and connect them to a
Another interesting feature of some devices is the ability to access data from outside your network, just with internet access. This also requires a specific configuration for the local network where the NAS (fixed public IP, virtual ports settings of the router).
There are many information on these devices in http://iomega.com/nas/home-network-storage-es.html
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