How to Replace a Failed Disk - Revision history

Jgutie11 at 22:49, 25 January 2021

2021-01-25T22:49:47Z

← Older revision		Revision as of 22:49, 25 January 2021
Line 136:		Line 136:
	[[Category:Sysadmin]]		[[Category:Sysadmin]]
	[[Category:Tutorials]]		[[Category:Tutorials]]
			[[Category:Delete]]

Benrwong at 02:08, 2 July 2016

2016-07-02T02:08:37Z

← Older revision		Revision as of 02:08, 2 July 2016
Line 133:		Line 133:

	That's it! :) <br/>		That's it! :) <br/>

			[[Category:Sysadmin]]
			[[Category:Tutorials]]

Therese at 19:55, 9 September 2014

2014-09-09T19:55:12Z

← Older revision		Revision as of 19:55, 9 September 2014
Line 42:		Line 42:

	So /dev/sda has clearly failed. <br/>		So /dev/sda has clearly failed. <br/>

	~~Here are the steps: <br/>~~

	Take note of the GOOD disk serial number so I leave that one in when I replace it: <br/>		Take note of the GOOD disk serial number so I leave that one in when I replace it: <br/>

Therese at 19:54, 9 September 2014

2014-09-09T19:54:35Z

← Older revision		Revision as of 19:54, 9 September 2014
Line 83:		Line 83:
	[...] <br/>		[...] <br/>
	title CentOS (2.6.18-128.el5) <br/>		title CentOS (2.6.18-128.el5) <br/>
	root (hd1,0) <br/>		root (hd1,0) <br/>
	kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00 <br/>		kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00 <br/>
	initrd /initrd-2.6.18-128.el5.img <br/>		initrd /initrd-2.6.18-128.el5.img <br/>
	title CentOS (2.6.18-128.el5) <br/>		title CentOS (2.6.18-128.el5) <br/>
	root (hd0,0) <br/>		root (hd0,0) <br/>
	kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/ <br/>		kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/ <br/>
	initrd /initrd-2.6.18-128.el5.img <br/>		initrd /initrd-2.6.18-128.el5.img <br/>

	Save and quit <br/>		Save and quit <br/>

	[root@myServer ~]# mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak <br/>		[root@myServer ~]# mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak <br/>
			[root@myServer ~]# mkinitrd /boot/initramfs-$(uname -r).img $(uname -r) <br/>
	[root@myServer ~]# mkinitrd /boot/initramfs-$(uname -r).img $(uname -r) <br/>		[root@myServer ~]# init 0 <br/>

	[root@myServer ~]# init 0 <br/>

	Swap the bad drive with the new drive and boot the machine. <br/>		Swap the bad drive with the new drive and boot the machine. <br/>
Line 106:		Line 104:
	The newly installed drive on myServer was named /dev/sda. <br/>		The newly installed drive on myServer was named /dev/sda. <br/>

	[root@myServer ~]# modeprobe raid1 <br/>		[root@myServer ~]# modeprobe raid1 <br/>
			[root@myServer ~]# modeprobe linear <br/>
	[root@myServer ~]# modeprobe linear ~~<br/>~~

	~~[root@myServer ~]# sfdisk -d /dev/sdb \| sfdisk --force /dev/sda <br/>~~

	~~[root@myServer ~]# sfdisk -l => sanity check~~ <br/>

	~~[root@myServer ~]# mdadm --manage /dev/md0 --add /dev/sda1 <br/>~~		Copy the partitions from one disk to the other:
	~~mdadm~~: ~~added /dev/sda1 <br/>~~

	[root@myServer ~]# ~~mdadm -~~-~~manage~~ /dev/~~md1~~ --~~add~~ /dev/~~sda2~~ <br/>		[root@myServer ~]# sfdisk -d /dev/sdb \| sfdisk --force /dev/sda <br/>
	~~mdadm: added /dev/sda2~~ <br/>		[root@myServer ~]# sfdisk -l => sanity check <br/>

	~~[root@myServer ~]# mdadm --manage /dev/md2 --add /dev/sda3 <br/>~~		Add the new disk to the raid array:
	~~mdadm~~: ~~added /dev/sda3 <br/>~~

	[root@myServer ~]# ~~cat~~ /~~proc~~/~~mdstat => Sanity check~~ <br/>		[root@myServer ~]# mdadm --manage /dev/md0 --add /dev/sda1 <br/>
	~~Personalities~~ : ~~[raid1] [linear] <br~~/>		mdadm: added /dev/sda1 <br/>
	~~md0 : active raid1~~ sda1~~[1] sdb1[0]~~ <br/>		[root@myServer ~]# mdadm --manage /dev/md1 --add /dev/sda2 <br/>
	~~128384 blocks~~ [2/~~2] [UU] <br~~/>		mdadm: added /dev/sda2 <br/>
			[root@myServer ~]# mdadm --manage /dev/md2 --add /dev/sda3 <br/>
	md1 ~~: active raid1~~ sda2~~[2] sdb2[0]~~ <br/>		mdadm: added /dev/sda3 <br/>
	~~16779776 blocks [2~~/~~1] [U_]~~ <br/>
	[~~>....................~~] ~~recovery = 3.2% (548864~~/~~16779776) finish=8.8min speed=30492K~~/~~sec <br~~/>

	~~md2 : active raid1~~ sda3~~[2] sdb3[0]~~ <br/>
	~~139379840 blocks [2~~/~~1] [U_] <br~~/>
	~~resync=DELAYED~~ ~~<br/>~~

	~~unused devices: <none>~~ <br/>

			Sanity check:
			[root@myServer ~]# cat /proc/mdstat <br/>
			Personalities : [raid1] [linear] <br/>
			md0 : active raid1 sda1[1] sdb1[0] <br/>
			128384 blocks [2/2] [UU] <br/>
			md1 : active raid1 sda2[2] sdb2[0] <br/>
			16779776 blocks [2/1] [U_] <br/>
			[>....................] recovery = 3.2% (548864/16779776) finish=8.8min speed=30492K/sec <br/>
			md2 : active raid1 sda3[2] sdb3[0] <br/>
			139379840 blocks [2/1] [U_] <br/>
			resync=DELAYED <br/>
			unused devices: <none> <br/>

	That's it! :) <br/>		That's it! :) <br/>

Therese at 19:51, 9 September 2014

2014-09-09T19:51:02Z

← Older revision		Revision as of 19:51, 9 September 2014
Line 16:		Line 16:
	smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>		smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>
	Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>		Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>

	Short INQUIRY response, skip product id <br/>		Short INQUIRY response, skip product id <br/>
	A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. <br/>		A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. <br/>
Line 24:		Line 23:
	smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>		smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>
	Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>		Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>

	=== START OF INFORMATION SECTION === <br/>		=== START OF INFORMATION SECTION === <br/>
	Model Family: Seagate Barracuda 7200.10 <br/>		Model Family: Seagate Barracuda 7200.10 <br/>
Line 38:		Line 36:
	SMART support is: Available - device has SMART capability. <br/>		SMART support is: Available - device has SMART capability. <br/>
	SMART support is: Enabled <br/>		SMART support is: Enabled <br/>

	=== START OF READ SMART DATA SECTION === <br/>		=== START OF READ SMART DATA SECTION === <br/>
	SMART overall-health self-assessment test result: PASSED <br/>		SMART overall-health self-assessment test result: PASSED <br/>
Line 55:		Line 52:
	[root@myServer ~]# mdadm --manage /dev/md0 --fail /dev/sda1 <br/>		[root@myServer ~]# mdadm --manage /dev/md0 --fail /dev/sda1 <br/>
	mdadm: set /dev/sda1 faulty in /dev/md0 <br/>		mdadm: set /dev/sda1 faulty in /dev/md0 <br/>

	[root@myServer ~]# mdadm --manage /dev/md1 --fail /dev/sda2 <br/>		[root@myServer ~]# mdadm --manage /dev/md1 --fail /dev/sda2 <br/>
	mdadm: set /dev/sda2 faulty in /dev/md1 <br/>		mdadm: set /dev/sda2 faulty in /dev/md1 <br/>

	[root@myServer ~]# mdadm --manage /dev/md2 --fail /dev/sda3 <br/>		[root@myServer ~]# mdadm --manage /dev/md2 --fail /dev/sda3 <br/>
	mdadm: set /dev/sda3 faulty in /dev/md2 <br/>		mdadm: set /dev/sda3 faulty in /dev/md2 <br/>

	[root@myServer ~]# mdadm --manage /dev/md0 --remove /dev/sda1 <br/>		[root@myServer ~]# mdadm --manage /dev/md0 --remove /dev/sda1 <br/>
	mdadm: hot removed /dev/sda1 <br/>		mdadm: hot removed /dev/sda1 <br/>

	[root@myServer ~]# mdadm --manage /dev/md1 --remove /dev/sda2 <br/>		[root@myServer ~]# mdadm --manage /dev/md1 --remove /dev/sda2 <br/>
	mdadm: hot removed /dev/sda2 <br/>		mdadm: hot removed /dev/sda2 <br/>

	[root@myServer ~]# mdadm --manage /dev/md2 --remove /dev/sda3 <br/>		[root@myServer ~]# mdadm --manage /dev/md2 --remove /dev/sda3 <br/>
	mdadm: hot removed /dev/sda3 <br/>		mdadm: hot removed /dev/sda3 <br/>
Line 73:		Line 65:
	Make sure grub is installed on the good disk and that grub.conf is updated:		Make sure grub is installed on the good disk and that grub.conf is updated:

			[root@myServer ~]# grub-install /dev/sdb <br/>
	[root@myServer ~]# grub-install /dev/sdb <br/>		Installation finished. No error reported. <br/>
	Installation finished. No error reported. <br/>		This is the contents of the device map /boot/grub/device.map. <br/>
	This is the contents of the device map /boot/grub/device.map. <br/>		Check if this is correct or not. <br/>
	Check if this is correct or not. <br/>		If any of the lines is incorrect, fix it and re-run the script `grub-install'. <br/>
	If any of the lines is incorrect, fix it and re-run the script `grub-install'. <br/>		This device map was generated by anaconda <br/>
			(hd0) /dev/sda <br/>
	This device map was generated by anaconda <br/>		(hd1) /dev/sdb <br/>
	(hd0) /dev/sda <br/>
	(hd1) /dev/sdb <br/>

	Take note of the which hd partition corresponds with the good disk, ie hd1 in this case. <br/>		Take note of the which hd partition corresponds with the good disk, ie hd1 in this case. <br/>

	[root@myServer ~]# vim /boot/grub/menu.lst <br/>		[root@myServer ~]# vim /boot/grub/menu.lst <br/>
			Add fallback=1 right after default=0 <br/>
	Add fallback=1 right after default=0 <br/>		Go to the bottom section where you should find some kernel stanzas. <br/>
	Go to the bottom section where you should find some kernel stanzas. <br/>		Copy the first of them and paste the stanza before the first existing stanza; replace root (hd0,0) with root (hd1,0) <br/>
	Copy the first of them and paste the stanza before the first existing stanza; replace root (hd0,0) with root (hd1,0) <br/>		Should look like this: <br/>
	Should look like this: <br/>		[...] <br/>
			title CentOS (2.6.18-128.el5) <br/>
	[...] <br/>
	title CentOS (2.6.18-128.el5) <br/>
	root (hd1,0) <br/>		root (hd1,0) <br/>
	kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00 <br/>		kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00 <br/>

Therese at 19:47, 9 September 2014

2014-09-09T19:47:34Z

Therese at 19:42, 9 September 2014

2014-09-09T19:42:49Z

← Older revision		Revision as of 19:42, 9 September 2014
Line 77:		Line 77:
	Installation finished. No error reported. <br/>		Installation finished. No error reported. <br/>
	This is the contents of the device map /boot/grub/device.map. <br/>		This is the contents of the device map /boot/grub/device.map. <br/>
	Check if this is correct or not. If any of the lines is incorrect, ~~<br/>~~		Check if this is correct or not. <br/>
	fix it and re-run the script `grub-install'. <br/>		If any of the lines is incorrect, fix it and re-run the script `grub-install'. <br/>

	~~# this~~ device map was generated by anaconda <br/>		This device map was generated by anaconda <br/>
	(hd0) /dev/sda <br/>		(hd0) /dev/sda <br/>
	(hd1) /dev/sdb <br/>		(hd1) /dev/sdb <br/>

Therese at 19:41, 9 September 2014

2014-09-09T19:41:02Z

← Older revision		Revision as of 19:41, 9 September 2014
Line 103:		Line 103:
	initrd /initrd-2.6.18-128.el5.img <br/>		initrd /initrd-2.6.18-128.el5.img <br/>

	Save and quit		Save and quit <br/>

	[root@myServer ~]# mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak		[root@myServer ~]# mv /boot/initramfs-$(uname -r).img /boot/initramfs-$(uname -r).img.bak <br/>

	[root@myServer ~]# mkinitrd /boot/initramfs-$(uname -r).img $(uname -r)		[root@myServer ~]# mkinitrd /boot/initramfs-$(uname -r).img $(uname -r) <br/>

	[root@myServer ~]# init 0		[root@myServer ~]# init 0 <br/>

	Swap the bad drive with the new drive and boot the machine.		Swap the bad drive with the new drive and boot the machine. <br/>

	Once it's booted:		Once it's booted: <br/>

	Check the device names with cat /proc/mdstat and/or fisk -l.		Check the device names with cat /proc/mdstat and/or fisk -l. <br/>
	The newly installed drive on myServer was named /dev/sda		The newly installed drive on myServer was named /dev/sda. <br/>

	[root@myServer ~]# modeprobe raid1		[root@myServer ~]# modeprobe raid1 <br/>

	[root@myServer ~]# modeprobe linear		[root@myServer ~]# modeprobe linear <br/>

	[root@myServer ~]# sfdisk -d /dev/sdb \| sfdisk --force /dev/sda		[root@myServer ~]# sfdisk -d /dev/sdb \| sfdisk --force /dev/sda <br/>

	[root@myServer ~]# sfdisk -l => sanity check		[root@myServer ~]# sfdisk -l => sanity check <br/>

	[root@myServer ~]# mdadm --manage /dev/md0 --add /dev/sda1		[root@myServer ~]# mdadm --manage /dev/md0 --add /dev/sda1 <br/>
	mdadm: added /dev/sda1		mdadm: added /dev/sda1 <br/>

	[root@myServer ~]# mdadm --manage /dev/md1 --add /dev/sda2		[root@myServer ~]# mdadm --manage /dev/md1 --add /dev/sda2 <br/>
	mdadm: added /dev/sda2		mdadm: added /dev/sda2 <br/>

	[root@myServer ~]# mdadm --manage /dev/md2 --add /dev/sda3		[root@myServer ~]# mdadm --manage /dev/md2 --add /dev/sda3 <br/>
	mdadm: added /dev/sda3		mdadm: added /dev/sda3 <br/>

	[root@myServer ~]# cat /proc/mdstat => Sanity check		[root@myServer ~]# cat /proc/mdstat => Sanity check <br/>
	Personalities : [raid1] [linear]		Personalities : [raid1] [linear] <br/>
	md0 : active raid1 sda1[1] sdb1[0]		md0 : active raid1 sda1[1] sdb1[0] <br/>
	128384 blocks [2/2] [UU]		128384 blocks [2/2] [UU] <br/>

	md1 : active raid1 sda2[2] sdb2[0]		md1 : active raid1 sda2[2] sdb2[0] <br/>
	16779776 blocks [2/1] [U_]		16779776 blocks [2/1] [U_] <br/>
	[>....................] recovery = 3.2% (548864/16779776) finish=8.8min speed=30492K/sec		[>....................] recovery = 3.2% (548864/16779776) finish=8.8min speed=30492K/sec <br/>

	md2 : active raid1 sda3[2] sdb3[0]		md2 : active raid1 sda3[2] sdb3[0] <br/>
	139379840 blocks [2/1] [U_]		139379840 blocks [2/1] [U_] <br/>
	resync=DELAYED		resync=DELAYED <br/>

	unused devices: <none>		unused devices: <none> <br/>


	That's it! :)		That's it! :) <br/>

Therese at 19:25, 9 September 2014

2014-09-09T19:25:29Z

← Older revision		Revision as of 19:25, 9 September 2014
Line 74:		Line 74:


	[root@myServer ~]# grub-install /dev/sdb		[root@myServer ~]# grub-install /dev/sdb <br/>
	Installation finished. No error reported.		Installation finished. No error reported. <br/>
	This is the contents of the device map /boot/grub/device.map.		This is the contents of the device map /boot/grub/device.map. <br/>
	Check if this is correct or not. If any of the lines is incorrect,		Check if this is correct or not. If any of the lines is incorrect, <br/>
	fix it and re-run the script `grub-install'.		fix it and re-run the script `grub-install'. <br/>

	# this device map was generated by anaconda		# this device map was generated by anaconda <br/>
	(hd0) /dev/sda		(hd0) /dev/sda <br/>
	(hd1) /dev/sdb		(hd1) /dev/sdb <br/>

	Take note of the which hd partition corresponds with the good disk, ie hd1 in this case.		Take note of the which hd partition corresponds with the good disk, ie hd1 in this case. <br/>

	[root@myServer ~]# vim /boot/grub/menu.lst		[root@myServer ~]# vim /boot/grub/menu.lst <br/>

	Add fallback=1 right after default=0		Add fallback=1 right after default=0 <br/>
	Go to the bottom section where you should find some kernel stanzas.		Go to the bottom section where you should find some kernel stanzas. <br/>
	Copy the first of them and paste the stanza before the first existing stanza; replace root (hd0,0) with root (hd1,0)		Copy the first of them and paste the stanza before the first existing stanza; replace root (hd0,0) with root (hd1,0) <br/>
	Should look like this:		Should look like this: <br/>

	[...]		[...] <br/>
	title CentOS (2.6.18-128.el5)		title CentOS (2.6.18-128.el5) <br/>
	root (hd1,0)		root (hd1,0) <br/>
	kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00		kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/VolGroup00/LogVol00 <br/>
	initrd /initrd-2.6.18-128.el5.img		initrd /initrd-2.6.18-128.el5.img <br/>
	title CentOS (2.6.18-128.el5)		title CentOS (2.6.18-128.el5) <br/>
	root (hd0,0)		root (hd0,0) <br/>
	kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/		kernel /vmlinuz-2.6.18-128.el5 ro root=/dev/ <br/>
	initrd /initrd-2.6.18-128.el5.img		initrd /initrd-2.6.18-128.el5.img <br/>

	Save and quit		Save and quit

Therese at 19:22, 9 September 2014

2014-09-09T19:22:03Z

Show changes

← Older revision		Revision as of 19:47, 9 September 2014
Line 3:		Line 3:
	The following demonstrates what a failed disk looks like:		The following demonstrates what a failed disk looks like:

	[root@myServer ~]# cat /proc/mdstat <br />		[root@myServer ~]# cat /proc/mdstat <br />
	Personalities : [raid1] <br/>		Personalities : [raid1] <br/>
	md0 : active raid1 sdb1[0] sda1[2](F) <br/>		md0 : active raid1 sdb1[0] sda1[2](F) <br/>
	128384 blocks [2/1] [U_] <br/>		128384 blocks [2/1] [U_] <br/>
	md1 : active raid1 sdb2[0] sda2[2](F) <br/>		md1 : active raid1 sdb2[0] sda2[2](F) <br/>
	16779776 blocks [2/1] [U_] <br/>		16779776 blocks [2/1] [U_] <br/>
	md2 : active raid1 sdb3[0] sda3[2](F) <br/>		md2 : active raid1 sdb3[0] sda3[2](F) <br/>
	139379840 blocks [2/1] [U_] <br/>		139379840 blocks [2/1] [U_] <br/>
	unused devices: <none> <br/>		unused devices: <none> <br/>

	[root@myServer ~]# smartctl -a /dev/sda <br/>		[root@myServer ~]# smartctl -a /dev/sda <br/>
	smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>		smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>
	Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>		Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>

	Short INQUIRY response, skip product id <br/>		Short INQUIRY response, skip product id <br/>
	A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. <br/>		A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. <br/>


	[root@myServer ~]# smartctl -a /dev/sdb <br/>		[root@myServer ~]# smartctl -a /dev/sdb <br/>
	smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>		smartctl 5.42 2011-10-20 r3458 [x86_64-linux-2.6.18-371.1.2.el5] (local build) <br/>
	Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>		Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net <br/>

	=== START OF INFORMATION SECTION === <br/>		=== START OF INFORMATION SECTION === <br/>
	Model Family: Seagate Barracuda 7200.10 <br/>		Model Family: Seagate Barracuda 7200.10 <br/>
	Device Model: ST3160815AS <br/>		Device Model: ST3160815AS <br/>
	Serial Number: 9RA6DZP8 <br/>		Serial Number: 9RA6DZP8 <br/>
	Firmware Version: 4.AAB <br/>		Firmware Version: 4.AAB <br/>
	User Capacity: 160,041,885,696 bytes [160 GB] <br/>		User Capacity: 160,041,885,696 bytes [160 GB] <br/>
	Sector Size: 512 bytes logical/physical <br/>		Sector Size: 512 bytes logical/physical <br/>
	Device is: In smartctl database [for details use: -P show] <br/>		Device is: In smartctl database [for details use: -P show] <br/>
	ATA Version is: 7 <br/>		ATA Version is: 7 <br/>
	ATA Standard is: Exact ATA specification draft version not indicated <br/>		ATA Standard is: Exact ATA specification draft version not indicated <br/>
	Local Time is: Mon Sep 8 15:50:48 2014 PDT <br/>		Local Time is: Mon Sep 8 15:50:48 2014 PDT <br/>
	SMART support is: Available - device has SMART capability. <br/>		SMART support is: Available - device has SMART capability. <br/>
	SMART support is: Enabled <br/>		SMART support is: Enabled <br/>

	=== START OF READ SMART DATA SECTION === <br/>		=== START OF READ SMART DATA SECTION === <br/>
	SMART overall-health self-assessment test result: PASSED <br/>		SMART overall-health self-assessment test result: PASSED <br/>

	There is a lot more that gets printed, but I cut it out. <br/>		There is a lot more that gets printed, but I cut it out. <br/>
Line 49:		Line 49:

	Take note of the GOOD disk serial number so I leave that one in when I replace it: <br/>		Take note of the GOOD disk serial number so I leave that one in when I replace it: <br/>
	Serial Number: 9RA6DZP8 <br/>		Serial Number: 9RA6DZP8 <br/>

	Mark and remove failed disk from raid: <br/>		Mark and remove failed disk from raid: <br/>

	[root@myServer ~]# mdadm --manage /dev/md0 --fail /dev/sda1 <br/>		[root@myServer ~]# mdadm --manage /dev/md0 --fail /dev/sda1 <br/>
	mdadm: set /dev/sda1 faulty in /dev/md0 <br/>		mdadm: set /dev/sda1 faulty in /dev/md0 <br/>

	[root@myServer ~]# mdadm --manage /dev/md1 --fail /dev/sda2 <br/>		[root@myServer ~]# mdadm --manage /dev/md1 --fail /dev/sda2 <br/>
	mdadm: set /dev/sda2 faulty in /dev/md1 <br/>		mdadm: set /dev/sda2 faulty in /dev/md1 <br/>

	[root@myServer ~]# mdadm --manage /dev/md2 --fail /dev/sda3 <br/>		[root@myServer ~]# mdadm --manage /dev/md2 --fail /dev/sda3 <br/>
	mdadm: set /dev/sda3 faulty in /dev/md2 <br/>		mdadm: set /dev/sda3 faulty in /dev/md2 <br/>

	[root@myServer ~]# mdadm --manage /dev/md0 --remove /dev/sda1 <br/>		[root@myServer ~]# mdadm --manage /dev/md0 --remove /dev/sda1 <br/>
	mdadm: hot removed /dev/sda1 <br/>		mdadm: hot removed /dev/sda1 <br/>

	[root@myServer ~]# mdadm --manage /dev/md1 --remove /dev/sda2 <br/>		[root@myServer ~]# mdadm --manage /dev/md1 --remove /dev/sda2 <br/>
	mdadm: hot removed /dev/sda2 <br/>		mdadm: hot removed /dev/sda2 <br/>

	[root@myServer ~]# mdadm --manage /dev/md2 --remove /dev/sda3 <br/>		[root@myServer ~]# mdadm --manage /dev/md2 --remove /dev/sda3 <br/>
	mdadm: hot removed /dev/sda3 <br/>		mdadm: hot removed /dev/sda3 <br/>

	Make sure grub is installed on the good disk and that grub.conf is updated:		Make sure grub is installed on the good disk and that grub.conf is updated: