Mdadm-badblocks - Revision history

Roy: /* Test 1 */

2020-11-12T17:11:47Z

Test 1

← Older revision		Revision as of 17:11, 12 November 2020
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	== Test 1 ==		== Test 1 ==
	The machine's is given two virtual disks, '''sdg''' and '''sdh''', 16GB each, used without a partition table. On these, '''dm-dust'''<ref>https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/device-mapper/dm-dust.html</ref> is used to create flakey devices, imposing errors like a drive would. On top of these, an mdadm mirror (RAID-1), is placed. On top of this, LVM is used, and then ext4. The software used is mdadm v4.1 (2018-10-01) and the Linux kernel 5.9.8 ~~from~~ kernel.org.		The machine's is given two virtual disks, '''sdg''' and '''sdh''', 16GB each, used without a partition table. On these, '''dm-dust'''<ref>https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/device-mapper/dm-dust.html</ref> is used to create flakey devices, imposing errors like a drive would. On top of these, an mdadm mirror (RAID-1), is placed. On top of this, LVM is used, and then ext4. The software used is mdadm v4.1 (2018-10-01) from '''Debian Bullseye''' and the official '''Linux kernel 5.9.8'''<ref>https://www.kernel.org/</ref>.

	= References =		= References =
	<references />		<references />

Roy: /* mdadm badblocks testing */

2020-11-12T17:08:28Z

mdadm badblocks testing

← Older revision		Revision as of 17:08, 12 November 2020
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	= mdadm badblocks testing =		= mdadm badblocks testing =

	This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md''' is full of shite.		This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md''' is full of shite. This has been addressed before <ref>https://raid.wiki.kernel.org/index.php/The_Badblocks_controversy</ref>

	~~Testing starts out at 2020-11-12 17~~:~~30, using '''dm-dust''' to~~

	== Setup ==		== Setup ==
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	== Test 1 ==		== Test 1 ==
	The machine's is given two virtual disks, '''sdg''' and '''sdh''', 16GB each, used without a partition table. On these, '''dm-dust''' ~~(see below)~~ is used to create flakey devices, imposing errors like a drive would. On top of these, an mdadm mirror (RAID-1), is placed. On top of this, LVM is used, and then ext4. The software used is mdadm v4.1 (2018-10-01) and the Linux kernel 5.9.8 from kernel.org.		The machine's is given two virtual disks, '''sdg''' and '''sdh''', 16GB each, used without a partition table. On these, '''dm-dust'''<ref>https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/device-mapper/dm-dust.html</ref> is used to create flakey devices, imposing errors like a drive would. On top of these, an mdadm mirror (RAID-1), is placed. On top of this, LVM is used, and then ext4. The software used is mdadm v4.1 (2018-10-01) and the Linux kernel 5.9.8 from kernel.org.

	~~== References ==~~

	* [https://raid.wiki.kernel.org/index.php/The_Badblocks_controversy The Badblocks controversy]		= References =
	* [https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/device-mapper/~~dm-dust.html dm-dust]~~		<references />

Roy at 16:59, 12 November 2020

2020-11-12T16:59:24Z

← Older revision		Revision as of 16:59, 12 November 2020
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	This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md''' is full of shite.		This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md''' is full of shite.

	Testing starts out at 2020-11-12 17:30, using '''dm-dust'''.		Testing starts out at 2020-11-12 17:30, using '''dm-dust''' to

			== Setup ==
			The test will be setup on a virtual machine (VM) running Debian Bullseye with the latest stable kernel from kernel.org. This way, I get updated versions of most stuff without building it all manually. If other versions than those in the distro are used, this will be pointed out in the text. All version numbers used will nevertheless be listed along with their origins.

			All tests are done with the virtio scsi driver. The host machine runs Debian Buster and the VM runs from within KVM, giving it a close to total isolation from its host.

			== Test 1 ==
			The machine's is given two virtual disks, '''sdg''' and '''sdh''', 16GB each, used without a partition table. On these, '''dm-dust''' (see below) is used to create flakey devices, imposing errors like a drive would. On top of these, an mdadm mirror (RAID-1), is placed. On top of this, LVM is used, and then ext4. The software used is mdadm v4.1 (2018-10-01) and the Linux kernel 5.9.8 from kernel.org.

	== References ==		== References ==

Roy: Created page with "= mdadm badblocks testing = This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md'''..."

2020-11-12T16:34:45Z

Created page with "= mdadm badblocks testing = This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md'''..."

New page

= mdadm badblocks testing =

This article is about mdadm (not Mdadm, but hell, mediawiki) badblocks testing, an attempt to prove that the badblocks implementation in '''md''' is full of shite.

Testing starts out at 2020-11-12 17:30, using '''dm-dust'''.

== References ==

* [https://raid.wiki.kernel.org/index.php/The_Badblocks_controversy The Badblocks controversy]
* [https://01.org/linuxgraphics/gfx-docs/drm/admin-guide/device-mapper/dm-dust.html dm-dust]