Mdraid - Revision history

Tgurr at 20:29, 14 November 2013

2013-11-14T20:29:53Z

← Older revision		Revision as of 22:29, 14 November 2013
Line 112:		Line 112:
	== Mount ==		== Mount ==
	{{Root\|mkdir -p /mnt/raid}}		{{Root\|mkdir -p /mnt/raid}}
	{{Root\|mount /~~mnd~~/raid}}		{{Root\|mount /mnt/raid}}


	== Enable mdadm.service ==		== Enable mdadm.service ==
	{{Root\|systemctl enable mdadm.service}}		{{Root\|systemctl enable mdadm.service}}

Tgurr at 10:18, 14 November 2013

2013-11-14T10:18:37Z

← Older revision		Revision as of 12:18, 14 November 2013
Line 83:		Line 83:

	== Free space reserved for root ==		== Free space reserved for root ==
	{{Warning\|Don't do this to partitions containing a linux os, only to plain storage partitions.		{{Warning\|Don't do this to partitions containing a linux os, only to plain storage partitions.}}

	{{Root\|tune2fs -m 0 /dev/md0}}		{{Root\|tune2fs -m 0 /dev/md0}}

Tgurr at 10:18, 14 November 2013

2013-11-14T10:18:18Z

← Older revision		Revision as of 12:18, 14 November 2013
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	== fstab ==		== fstab ==

			{{Root\|blkid}}

	{{Code\|/etc/fstab\|		{{Code\|/etc/fstab\|
Line 110:		Line 112:
	== Mount ==		== Mount ==
	{{Root\|mkdir -p /mnt/raid}}		{{Root\|mkdir -p /mnt/raid}}
	{{Root\|mount /~~dev~~/~~md0~~}}		{{Root\|mount /mnd/raid}}


	== Enable mdadm.service ==		== Enable mdadm.service ==
	{{Root\|systemctl enable mdadm.service}}		{{Root\|systemctl enable mdadm.service}}

Tgurr at 09:56, 14 November 2013

2013-11-14T09:56:40Z

← Older revision		Revision as of 11:56, 14 November 2013
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	== Create the RAID array ==		== Create the RAID array ==


	=== RAID 1 ===		=== RAID 1 ===

	{{Root\|<nowiki>mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1</nowiki>}}		{{Root\|<nowiki>mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1</nowiki>}}


	=== RAID 5===		=== RAID 5===

	{{Root\|<nowiki>mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sd[b-d]1</nowiki>}}		{{Root\|<nowiki>mdadm --create /dev/md0 --level=5 --raid-devices=3 /dev/sd[b-d]1</nowiki>}}


	=== Checking the progress ===		=== Checking the progress ===
Line 51:		Line 54:

	{{Root\|mdadm --examine /dev/sdb1}}		{{Root\|mdadm --examine /dev/sdb1}}


	== Create the file system ==		== Create the file system ==

	Useful for calculating the options: http://uclibc.org/~aldot/mkfs_stride.html		Useful for calculating the options: http://uclibc.org/~aldot/mkfs_stride.html


	=== RAID 1===		=== RAID 1===
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	{{Root\|mkfs.ext4 -b 4096 /dev/md0}}		{{Root\|mkfs.ext4 -b 4096 /dev/md0}}


	=== RAID 5===		=== RAID 5===
Line 70:		Line 76:

	{{Root\|<nowiki>mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0</nowiki>}}		{{Root\|<nowiki>mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0</nowiki>}}


	== Label ==		== Label ==
	{{Root\|tune2fs -L raid /dev/md0}}		{{Root\|tune2fs -L raid /dev/md0}}


	== Free space reserved for root ==		== Free space reserved for root ==
Line 78:		Line 86:

	{{Root\|tune2fs -m 0 /dev/md0}}		{{Root\|tune2fs -m 0 /dev/md0}}


	== fstab ==		== fstab ==
Line 86:		Line 95:
	</pre>		</pre>
	}}		}}


	== Update /etc/mdadm.conf ==		== Update /etc/mdadm.conf ==
	{{Root\|mdadm --detail --scan >> /etc/mdadm.conf}}		{{Root\|mdadm --detail --scan >> /etc/mdadm.conf}}

	{{Code\|/etc/~~fstab~~\|		{{Code\|/etc/mdadm.conf\|
	<pre>		<pre>
	ARRAY /dev/md0 metadata=1.2 name=host:0 UUID=b036ad79:939fd4ae:e2c02f3f:5c2e7087		ARRAY /dev/md0 metadata=1.2 name=host:0 UUID=b036ad79:939fd4ae:e2c02f3f:5c2e7087
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	</pre>		</pre>
	}}		}}


	== Mount ==		== Mount ==
	{{Root\|mkdir -p /mnt/raid}}		{{Root\|mkdir -p /mnt/raid}}
	{{Root\|mount /~~mnt~~/~~raid~~}}		{{Root\|mount /dev/md0}}


			== Enable mdadm.service ==
			{{Root\|systemctl enable mdadm.service}}

Tgurr at 09:45, 14 November 2013

2013-11-14T09:45:54Z

@@ Line 84: / Line 84: @@
 <pre>
 UUID=b036ad79-939f-d4ae-e2c0-2f3f5c2e7087	/mnt/raid	ext4	defaults,noatime	0 2
 </pre>
 }}

Tgurr at 09:36, 14 November 2013

2013-11-14T09:36:02Z

← Older revision		Revision as of 11:36, 14 November 2013
Line 73:		Line 73:
	== Label ==		== Label ==
	{{Root\|tune2fs -L raid /dev/md0}}		{{Root\|tune2fs -L raid /dev/md0}}

			== Free space reserved for root ==
			{{Warning\|Don't do this to partitions containing a linux os, only to plain storage partitions.

			{{Root\|tune2fs -m 0 /dev/md0}}

	== fstab ==		== fstab ==

Tgurr at 09:27, 14 November 2013

2013-11-14T09:27:57Z

← Older revision		Revision as of 11:27, 14 November 2013
Line 70:		Line 70:

	{{Root\|<nowiki>mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0</nowiki>}}		{{Root\|<nowiki>mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0</nowiki>}}

			== Label ==
			{{Root\|tune2fs -L raid /dev/md0}}

	== fstab ==		== fstab ==
Line 75:		Line 78:
	{{Code\|/etc/fstab\|		{{Code\|/etc/fstab\|
	<pre>		<pre>
	UUID=b036ad79-939f-d4ae-e2c0-2f3f5c2e7087 /mnt/raid ext4 defaults,noatime		UUID=b036ad79-939f-d4ae-e2c0-2f3f5c2e7087 /mnt/raid ext4 defaults,noatime 0 2
	</pre>		</pre>
	}}		}}

			== Mount ==
			{{Root\|mkdir -p /mnt/raid}}
			{{Root\|mount /mnt/raid}}

Tgurr at 02:44, 14 November 2013

2013-11-14T02:44:54Z

← Older revision		Revision as of 04:44, 14 November 2013
Line 47:		Line 47:
	{{Root\|cat /proc/mdstat}}		{{Root\|cat /proc/mdstat}}
	{{Root\|mdadm --detail /dev/md0}}		{{Root\|mdadm --detail /dev/md0}}

			{{Note\|Don't be scared when you see [UU_], initially the raid is created in a degraded state, when the process is completed it should show [UUU].}}

	{{Root\|mdadm --examine /dev/sdb1}}		{{Root\|mdadm --examine /dev/sdb1}}

Tgurr at 02:41, 14 November 2013

2013-11-14T02:41:08Z

← Older revision		Revision as of 04:41, 14 November 2013
Line 66:		Line 66:
	* stripe-width = stride * ( (n disks in raid5) - 1 ) here: 128 * ( (3) - 1 ) = 256		* stripe-width = stride * ( (n disks in raid5) - 1 ) here: 128 * ( (3) - 1 ) = 256

	{{Root\|mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0}}		{{Root\|<nowiki>mkfs.ext4 -b 4096 -E stride=128,stripe-width=256 /dev/md0</nowiki>}}

	== fstab ==		== fstab ==

Tgurr at 02:40, 14 November 2013

2013-11-14T02:40:49Z

@@ Line 48: / Line 48: @@
 {{Root|mdadm --detail /dev/md0}}
 {{Root|mdadm --examine /dev/sdb1}}
 == fstab ==