Debian Soft Raid - Revision history

PhilippeTeuwen: /* Troubleshooting */

2013-12-13T18:52:25Z

Troubleshooting

← Older revision		Revision as of 18:52, 13 December 2013
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	mount also /proc /boot etc		mount also /proc /boot etc
	mkinitrd -o /boot/initrd.img-raid <kernel version>		mkinitrd -o /boot/initrd.img-raid <kernel version>

			See also [[LaCie_5big_Network_2#Two_faulty_disks_on_a_5-disk_RAID5]]

	==Useful commands==		==Useful commands==

PhilippeTeuwen: Reverted edits by Etegohy (Talk) to last revision by Dorian

2010-11-24T20:31:49Z

Reverted edits by Etegohy (Talk) to last revision by Dorian

Can't load revision 6779

at 00:25, 24 November 2010

2010-11-24T00:25:44Z

Can't load revision 6616

Dorian: /* Fresh install debian */

2010-01-07T14:37:38Z

Fresh install debian

← Older revision		Revision as of 14:37, 7 January 2010
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	== Fresh install debian ==		== Fresh install debian ==
	[[http://www200.pair.com/mecham/raid/raid1.html \| A good starting point ]]		[http://www200.pair.com/mecham/raid/raid1.html \| A good starting point]

	==Troubleshooting==		==Troubleshooting==

Dorian: /* Fresh install debian */

2010-01-07T14:37:21Z

Fresh install debian

← Older revision		Revision as of 14:37, 7 January 2010
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	== Fresh install debian ==		== Fresh install debian ==
	[[~~A good starting point \|~~ http://www200.pair.com/mecham/raid/raid1.html]]		[[http://www200.pair.com/mecham/raid/raid1.html \| A good starting point ]]

	==Troubleshooting==		==Troubleshooting==

Dorian at 07:52, 7 January 2010

2010-01-07T07:52:25Z

← Older revision		Revision as of 07:52, 7 January 2010
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	/dev/hda2 swap swap defaults,pri=1 0 0		/dev/hda2 swap swap defaults,pri=1 0 0
	/dev/hdc2 swap swap defaults,pri=1 0 0		/dev/hdc2 swap swap defaults,pri=1 0 0

			== Fresh install debian ==
			[[A good starting point \| http://www200.pair.com/mecham/raid/raid1.html]]

	==Troubleshooting==		==Troubleshooting==

PhilippeTeuwen: /* Intro */

2008-02-12T01:10:24Z

Intro

← Older revision		Revision as of 01:10, 12 February 2008
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	<br>A very interesting page: http://www200.pair.com/mecham/raid/raid1-degraded-etch.html		<br>A very interesting page: http://www200.pair.com/mecham/raid/raid1-degraded-etch.html
	<br>It helps getting familiar with the concepts.		<br>It helps getting familiar with the concepts.
			<br>Here it's not a step-by-step anymore as the first time I used the old method described later and I used the new mdadm-only way to replace a broken drive, build new raid1 arrays as the new drive was larger (and the old smaller than the surviving one) and a raid1 on the /boot and moving from lilo to grub.

	===Creating degraded array===		===Creating degraded array===
	Here we're missing /dev/hda3 so we start with only /dev/hdd3:		Here we're missing /dev/hda3 so we start with only /dev/hdd3:

PhilippeTeuwen: /* Yaird */

2008-02-12T01:07:37Z

Yaird

← Older revision		Revision as of 01:07, 12 February 2008
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	I had also some difficulties when I broke my initrd and had to reboot on a 2.6.14 because apparently kernels pre-2.6.18 cannot generate properly initrd images.		I had also some difficulties when I broke my initrd and had to reboot on a 2.6.14 because apparently kernels pre-2.6.18 cannot generate properly initrd images.
	<br>Hopefully I had a backup of the initrd otherwise try to reboot on a liveCD and chroot or build a new kernel from source without initrd then boot on that one to prepare the initrd.		<br>Hopefully I had a backup of the initrd otherwise try to reboot on a liveCD and chroot or build a new kernel from source without initrd then boot on that one to prepare the initrd.

			You can always inspect the initrd by yourself to check things like modules, raid assembly etc, the file is a cpio archive gzip compressed.

	===Grub===		===Grub===
	I moved from lilo to grub and installed the first stage on both drives:		I moved from lilo to grub and installed the first stage on both drives:

PhilippeTeuwen: /* Grub */

2008-02-12T01:06:24Z

Grub

← Older revision		Revision as of 01:06, 12 February 2008
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	Then prepare for reboot		Then prepare for reboot

			===Yaird===
			To rebuild the initrd there are several tools but finally I used yaird which allowed me to preload my IDE driver and get UDMA modes working, which was essential to get sth like 20x faster data transfers!
			<br>I inserted just before the MOUNTDIR keyword which takes care of inserting the needed generic IDE drivers the amd74xx driver I needed for my nVidia chipset:
			/etc/yaird/Default.cfg
			MODULE amd74xx
			MOUNTDIR "/" "/mnt"
			I had also some difficulties when I broke my initrd and had to reboot on a 2.6.14 because apparently kernels pre-2.6.18 cannot generate properly initrd images.
			<br>Hopefully I had a backup of the initrd otherwise try to reboot on a liveCD and chroot or build a new kernel from source without initrd then boot on that one to prepare the initrd.
	===Grub===		===Grub===
	I moved from lilo to grub and installed the first stage on both drives:		I moved from lilo to grub and installed the first stage on both drives:
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	But I don't know how to make it happening automatically via update-grub, anyway in case of a failure of the first harddrive I'll probably have to reboot manually and Grub is rich enough to allow reconfiguration on-the-fly.		But I don't know how to make it happening automatically via update-grub, anyway in case of a failure of the first harddrive I'll probably have to reboot manually and Grub is rich enough to allow reconfiguration on-the-fly.
	<br>That's the major reason why I moved away from lilo.		<br>That's the major reason why I moved away from lilo.

	==How to switch a Debian system on software RAID 1 (mirroring) (OLD)==		==How to switch a Debian system on software RAID 1 (mirroring) (OLD)==

PhilippeTeuwen: /* Changing super-minor */

2008-02-12T01:00:29Z

Changing super-minor

← Older revision		Revision as of 01:00, 12 February 2008
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	mdadm --stop /dev/md3		mdadm --stop /dev/md3
	mdadm --assemble /dev/md2 /dev/hda5 /dev/hdd5		mdadm --assemble /dev/md2 /dev/hda5 /dev/hdd5
			Then prepare for reboot
	Then we've to update again /etc/mdadm/mdadm.conf

	===Grub===		===Grub===