176 lines
3.0 KiB
HTML
176 lines
3.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>Storage Area Networks - Draft</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux System Administrators Guide"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Using Disks and Other Storage Media"
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HREF="disk-usage.html"><LINK
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REL="PREVIOUS"
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TITLE="Hard disks"
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HREF="hard-disk.html"><LINK
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REL="NEXT"
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TITLE="Network Attached Storage - Draft"
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HREF="net-attached.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux System Administrators Guide: </TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="hard-disk.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 5. Using Disks and Other Storage Media</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="net-attached.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="SAN"
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></A
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>5.3. Storage Area Networks - Draft</H1
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><P
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>A SAN
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is a dedicated storage network that provides block level
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access to LUNs. A LUN,
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or logical unit number, is a virtual disk
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provided by the SAN.
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The system administrator the same access and rights to the LUN as if
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it were a disk directly attached to it. The administrator can partition, and
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format the disk in any means he or she chooses.</P
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><P
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>Two networking protocols commonly used in a SAN are
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<I
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CLASS="GLOSSTERM"
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>fibre channel</I
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>
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and
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<I
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CLASS="GLOSSTERM"
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>iSCSI</I
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>
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.
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A fibre channel network is very fast and is not
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burdened by the other network traffic in a company's LAN. However, it's
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very expensive. Fibre channel cards cost around $1000.00 USD each. They
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also require special fibre channel switches. </P
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><P
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>iSCSI is a newer technology that sends SCSI commands over a TCP/IP
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network. While this method may not be as fast as a Fibre Channel network,
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it does save money by using less expensive network hardware.</P
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><P
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>More To Be Added</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="hard-disk.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="net-attached.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Hard disks</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="disk-usage.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Network Attached Storage - Draft</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |