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	<title>Excalibur Partners &#187; RAID</title>
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	<description>Technical References</description>
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		<title>Hot Adding a SCSI Device</title>
		<link>http://www.excaliburtech.net/archives/33</link>
		<comments>http://www.excaliburtech.net/archives/33#comments</comments>
		<pubDate>Fri, 11 Jul 2008 16:17:29 +0000</pubDate>
		<dc:creator>Admin</dc:creator>
				<category><![CDATA[Firewalls]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[RAID]]></category>
		<category><![CDATA[Windows]]></category>

		<guid isPermaLink="false">http://www.excalibur-partners.com/?p=33</guid>
		<description><![CDATA[When hot adding a SCSI device, such as a hard drive, you might have noticed that it doesn&#8217;t show in /dev. You can either reboot, which defeats the purpose of hot adding the device, or notify Linux to rescan the SCSI bus. If you know the host adapter number use this command replacing 0 with [...]]]></description>
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		<title>Useful Mdadm Commands</title>
		<link>http://www.excaliburtech.net/archives/19</link>
		<comments>http://www.excaliburtech.net/archives/19#comments</comments>
		<pubDate>Sun, 16 Dec 2007 21:43:41 +0000</pubDate>
		<dc:creator>Admin</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[RAID]]></category>

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		<description><![CDATA[Below is a collection of commands for mdadm that I have found useful. Use these at your own risk. Create RAID mdadm --create /dev/md0 --level=5 --raid-devices=4 /dev/sd&#91;bcde&#93;1 mkfs.ext3 /dev/md0 Remove disk from RAID mdadm --fail /dev/md0 /dev/sda1 mdadm --remove /dev/md0 /dev/sda1 Copy the partition structure (when replacing a failed drive) sfdisk -d /dev/sda &#124; sfdisk [...]]]></description>
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		<title>RAID Explained</title>
		<link>http://www.excaliburtech.net/archives/20</link>
		<comments>http://www.excaliburtech.net/archives/20#comments</comments>
		<pubDate>Sun, 16 Dec 2007 21:39:55 +0000</pubDate>
		<dc:creator>Admin</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[RAID]]></category>

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		<description><![CDATA[RAID, which stands for &#8220;redundant array of independent&#8221; disks provides a way to group disks into one volume and/or provide fault tolerance. There are three way to implement RAID: hardware, a combination of hardware/software, and software only. Hardware RAID uses an add in card (PCI, PCI Express, PCI-X). The card has on-board memory and a [...]]]></description>
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		<title>Installing Debian/Ubuntu on an Existing RAID/LVM</title>
		<link>http://www.excaliburtech.net/archives/18</link>
		<comments>http://www.excaliburtech.net/archives/18#comments</comments>
		<pubDate>Thu, 13 Dec 2007 04:26:24 +0000</pubDate>
		<dc:creator>Admin</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[RAID]]></category>

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		<description><![CDATA[I like to test all the possible scenarios before putting a server into production. One of these tests was whether I could reinstall linux without disturbing the RAID arrays. Unfortunately the Debian and Ubuntu installers do not make this easy. When you reach the partitioning stage it will just show you the physical drives with [...]]]></description>
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