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>5.3. Storage Area Networks - Draft</H1
><P
>A SAN
is a dedicated storage network that provides block level
access to LUNs. A LUN,
or logical unit number, is a virtual disk
provided by the SAN.
The system administrator the same access and rights to the LUN as if
it were a disk directly attached to it. The administrator can partition, and
format the disk in any means he or she chooses.</P
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>Two networking protocols commonly used in a SAN are
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>fibre channel</I
>
and
<I
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>iSCSI</I
>
.
A fibre channel network is very fast and is not
burdened by the other network traffic in a company's LAN. However, it's
very expensive. Fibre channel cards cost around $1000.00 USD each. They
also require special fibre channel switches. </P
><P
>iSCSI is a newer technology that sends SCSI commands over a TCP/IP
network. While this method may not be as fast as a Fibre Channel network,
it does save money by using less expensive network hardware.</P
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