Clear RAID Signatures on Linux - Revision history

Leo: Text replacement - "Category:Linux{{Navbox Linux}}" to "{{Navbox Linux}}Category:Linux"

2019-09-01T06:21:00Z

Text replacement - "Category:Linux{{Navbox Linux}}" to "{{Navbox Linux}}Category:Linux"

← Older revision		Revision as of 06:21, 1 September 2019
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	[[Category:Linux]]~~{{Navbox Linux}}~~		{{Navbox Linux}}[[Category:Linux]]

Leo: Text replacement - "Category:Linux" to "Category:Linux{{Navbox Linux}}"

2019-09-01T05:08:02Z

Text replacement - "Category:Linux" to "Category:Linux{{Navbox Linux}}"

← Older revision		Revision as of 05:08, 1 September 2019
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	[[Category:Linux]]		[[Category:Linux]]{{Navbox Linux}}

Leo at 19:35, 15 December 2016

2016-12-15T19:35:09Z

← Older revision		Revision as of 19:35, 15 December 2016
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	After removing the configs, verify using {{code\|dmraid -r}}.		After removing the configs, verify using {{code\|dmraid -r}}.

			== See Also ==
			* http://serverfault.com/questions/488346/removing-raid-metadata-from-drives


	[[Category:Linux]]		[[Category:Linux]]

Leo at 19:34, 15 December 2016

2016-12-15T19:34:33Z

← Older revision		Revision as of 19:34, 15 December 2016
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	You may need to clear RAID ~~signatures~~ left on hard drives when trying to install Linux on a disk from a RAID array.		You may need to clear RAID configs left on hard drives when trying to install Linux on a disk from a RAID array.

			Installers such as Anaconda will not list drives with these RAID signatures. If you're unable to find a disk in Anaconda, clear the configs using the steps below.

	== Listing Devices ==		== Listing Devices ==
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	== Removing Devices ==		== Removing Devices ==
			Use any one of these methods to clear the RAID configs from the disk. The bulletproof method is to use {{code\|dd}}.

	Remove using {{code\|dmsetup}}:		Remove using {{code\|dmsetup}}:
	{{highlight\|lang=terminal\|code=		{{highlight\|lang=terminal\|code=
	dmsetup remove /dev/mapper/ddfs1_backups		# dmsetup remove /dev/mapper/ddfs1_backups
	}}		}}

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	Remove by overwriting the raid configs using {{code\|dd}}. The location the configs are located at the last 1024 sectors of the disk.		Remove by overwriting the raid configs using {{code\|dd}}. The location the configs are located at the last 1024 sectors of the disk.
	{{highlight\|lang=terminal\|code=		{{highlight\|lang=terminal\|code=
	dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 1024 )) count=1024		# dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 1024 )) count=1024
	}}		}}

			After removing the configs, verify using {{code\|dmraid -r}}.
	[[Category:Linux]]		[[Category:Linux]]

Leo: /* Removing Devices */

2016-12-15T19:31:27Z

Removing Devices

← Older revision		Revision as of 19:31, 15 December 2016
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	}}		}}

	Remove by overwriting the raid configs using {{code\|\|dd}}. The location the configs are located at the last 1024 sectors of the disk.		Remove by overwriting the raid configs using {{code\|dd}}. The location the configs are located at the last 1024 sectors of the disk.
	{{highlight\|lang=terminal\|code=		{{highlight\|lang=terminal\|code=
	dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 1024 )) count=1024		dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 1024 )) count=1024

Leo: Created page with "You may need to clear RAID signatures left on hard drives when trying to install Linux on a disk from a RAID array. == Listing Devices == {{highlight|lang=terminal|code= # dm..."

2016-12-15T19:31:10Z

Created page with "You may need to clear RAID signatures left on hard drives when trying to install Linux on a disk from a RAID array. == Listing Devices == {{highlight|lang=terminal|code= # dm..."

New page

You may need to clear RAID signatures left on hard drives when trying to install Linux on a disk from a RAID array.

== Listing Devices ==
{{highlight|lang=terminal|code=
# dmraid -r
/dev/sda: ddf1, ".ddf1_backups", GROUP, ok, 3904294912 sectors, data@ 0
}}

== Removing Devices ==

Remove using {{code|dmsetup}}:
{{highlight|lang=terminal|code=
dmsetup remove /dev/mapper/ddfs1_backups
}}

Remove using {{code|dmraid}}:
{{highlight|lang=terminal|code=
# dmraid -r -E /dev/sda
Do you really want to erase "ddf1" ondisk metadata on /dev/sda ? [y/n] :y

ERROR: ddf1: seeking device "/dev/sda" to 1024204253954048
ERROR: writing metadata to /dev/sda, offset 2000398933504 sectors, size 0 bytes returned 0
ERROR: erasing ondisk metadata on /dev/sda
}}

Remove by overwriting the raid configs using {{code||dd}}. The location the configs are located at the last 1024 sectors of the disk.
{{highlight|lang=terminal|code=
dd if=/dev/zero of=/dev/sda bs=512 seek=$(( $(blockdev --getsz /dev/sda) - 1024 )) count=1024
}}

[[Category:Linux]]