biolocal:Linux raid - Revision history

Gianluca at 11:23, 19 June 2008

2008-06-19T11:23:58Z

←Older revision		Revision as of 11:23, 19 June 2008
Line 54:		Line 54:
	</pre>		</pre>

-	~~Get the new device name for~~ the new disk and add it to the raid:	+	Prepare the new disk with a "Linux raid autodetect" partition and add it to the raid:
	<pre>		<pre>
	mdadm --add /dev/md0 /dev/sdd1		mdadm --add /dev/md0 /dev/sdd1
	</pre>		</pre>

2008-06-19T11:19:38Z

←Older revision		Revision as of 11:19, 19 June 2008
Line 43:		Line 43:
	<pre>		<pre>
	mdadm --detail --scan >> /etc/mdadm.conf		mdadm --detail --scan >> /etc/mdadm.conf
		+	</pre>
		+
		+
		+	'''Manage array disk replaces'''
		+
		+	Put the corrupted disk in failure status and remove it:
		+	<pre>
		+	mdadm /dev/md4 -f /dev/sdd1
		+	mdadm /dev/md4 -r /dev/sdd1
		+	</pre>
		+
		+	Get the new device name for the new disk and add it to the raid:
		+	<pre>
		+	mdadm --add /dev/md0 /dev/sdd1
	</pre>		</pre>

2008-06-19T11:04:03Z

←Older revision		Revision as of 11:04, 19 June 2008
Line 25:		Line 25:
	'''RAID creation'''		'''RAID creation'''

-	Create new ~~partitions as~~ Linux raid autodetect (type fd in fdisk) on each disk ~~that should be added~~	+	Create new "Linux raid autodetect" partitions (type code fd in fdisk) on each disk:
	<pre>		<pre>
	fdisk /dev/sda		fdisk /dev/sda

2008-06-19T10:56:49Z

←Older revision		Revision as of 10:56, 19 June 2008
Line 1:		Line 1:
-	~~Verify raid status:~~	+	'''RAID Management'''

		+	Verify raid status:
	<pre>		<pre>
	mdadm --detail /dev/md0		mdadm --detail /dev/md0
		+	</pre>
		+
		+	Examine disks:
		+	<pre>
		+	mdadm -E /dev/sdd1
		+	</pre>
		+
		+	Stopping a raid disk:
		+	<pre>
		+	mdadm -S /dev/md0
		+	</pre>
		+
		+	Assemble a already configured raid disk:
		+	<pre>
		+	mdadm -A /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1
		+	mdadm -Af /dev/md0 /dev/sda1 /dev/sdb1 /dev/sdc1 (force)
		+	</pre>
		+
		+
		+	'''RAID creation'''
		+
		+	Create new partitions as Linux raid autodetect (type fd in fdisk) on each disk that should be added
		+	<pre>
		+	fdisk /dev/sda
		+	</pre>
		+
		+	Create the array
		+	<pre>
		+	mdadm --create /dev/md0 --level=5 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
		+	</pre>
		+
		+	Add the device list string into the file /etc/mdadm.conf:
		+	<pre>
		+	DEVICE /dev/sda* /dev/sdb* /dev/sdc* /dev/sdd*
		+	</pre>
		+
		+	Automatically complete the configuration appending the raid device information:
		+	<pre>
		+	mdadm --detail --scan >> /etc/mdadm.conf
	</pre>		</pre>

Gianluca: New page: Verify raid status:

 mdadm --detail /dev/md0

2008-06-19T09:27:20Z

New page: Verify raid status: <pre> mdadm --detail /dev/md0 </pre>

New page

Verify raid status:

<pre>
mdadm --detail /dev/md0
</pre>