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Mdadm Cannot Re Add

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And how can I check if the partition tables are identical?Thanks for your help! Code: dd if=/dev/sdX of=mbr.bin bs=512 count=1 dd if=mbr.bin of=/dev/sdY bs=512 count=1 partprobe Last edited by FastServ; 11-14-2011 at 11:23 PM. Or you just want to chat? FedoraForum.org is privately owned and is not directly sponsored by the Fedora Project or Red Hat, Inc.

kotomo View Public Profile Find all posts by kotomo #2 8th November 2011, 07:21 PM kotomo Offline Registered User Join Date: Nov 2011 Posts: 2 Re: Cannot re-add thanx Default AHCI settings will work fine for hot swap. A few days ago I installed Arch on a mdadm RAID1 with two 500 GB hard drive. Ie replacing /dev/sdb, the new drive will be /dev/sdb etc.

Mdadm Re-add Is Not Possible

Any bit of help is much appreciated! Why is the 'You talking to me' speech from the movie 'Taxi Driver' so famous? I still have the error. Also if you know the serial numbers of your working drives, or the failed one, you can double check the drive you remove is the bad one.

Alternating Fibonacci Why do languages require parenthesis around expressions when used with "if" and "while"? I think the main issue is many people run with 'IDE' or 'Legacy' mode in BIOS which cannot support hot swapping, and may require rescanning if it even works at all. Can a president win the electoral college and lose the popular vote Why is this C++ code faster than my hand-written assembly for testing the Collatz conjecture? Mdadm Add Failed Drive Back To Array Thank you!

During the synchronization the output will look like this: PHP Code: server1:~#cat/proc/mdstat
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Once we realized this we started setting them up on ahci to start with, but have some existing systems on ide, which may be the cause for the problem there. Mdadm Stop crontab Linux - Software 3 09-04-2008 10:02 AM remount RAID drive after reboot with mdadm ufmale Linux - Software 1 11-15-2007 09:13 PM How to copy ext2fs from failed hard drive thanx Reply With Quote 0 11-22-2011,11:54 AM #36 ttgt View Profile View Forum Posts View Forum Threads Web Hosting Master Join Date Mar 2009 Posts 2,709 Hi, do you Ubuntu 16.04 installer cant see SSD drive Should you change a thermostat when changing your water pump Can Trump undo the UN climate change agreement?

Mdadm State Removed

This is what I get when trying to stop the array: Code: sudo mdadm --stop /dev/md0 mdadm: Cannot get exclusive access to /dev/md0:Perhaps a running process, mounted filesystem or active volume https://ubuntuforums.org/showthread.php?t=2152117 Please visit this page to clear all LQ-related cookies. Mdadm Re-add Is Not Possible From what i gather the next step is to remove the drive from the array (mdadm /dev/md0 -r sdf), when i try this i receive the error: mdadm: cannot find /dev/sdf: Mdadm Add Removed Drive Page 1 of 2 12 Last Jump to page: Results 1 to 40 of 45 Thread: Replacing failed disk in mdadm Tweet Thread Tools Show Printable Version Subscribe to this Thread…

A guy scammed me, but he gave me a bank account number & routing number. Let me know if you need more information, just give me the commands and I can give you the feedback. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Arguably, this might be desired BEFORE readding the devices, as you might be able to use --re-add and save a rebuild. 2 members found this post helpful. Mdadm: Does Not Appear To Be An Md Device

You may have to register before you can post: click the register link above to proceed. Luckily it was still under warranty and I was sent a new hard drive which I installed today. My question is how do i remove this non-existent failed drive from my array as i was able to re-add it just fine as /dev/sdk with mdadm /dev/md0 -a /dev/sdk Also, When they are gone, but still locked by MDADM, the device nodes stay in kernel space even though udev devices are gone.

Which I did, and read the answer, and was so happy, then saw I posted it! Mdadm Assemble We have a Ubuntu server setup with RAID-10 and two of the drives dropped out of the array. Search this Thread 01-17-2010, 05:22 PM #1 touser Member Registered: Apr 2005 Posts: 31 Rep: mdadm cannot remove failed drive, drive name changed.

Offline #4 2011-10-18 21:40:42 lilsirecho Veteran Registered: 2003-10-24 Posts: 5,000 Re: Software Raid 1 with mdadm but cannot re-add a removed disk Read mdadm concerning --grow--- for help....

Adv Reply June 7th, 2013 #4 RyanBiggs View Profile View Forum Posts Private Message Spilled the Beans Join Date Jun 2013 Beans 14 Re: Reattaching removed disk in mdadm RAID-1 What is the point of update independent rendering in a game loop? When I try to re-add them using the following command: mdadm --manage --re-add /dev/md2 /dev/sdc1 I get the following error message: mdadm: Cannot open /dev/sdc1: Device or resource busy When I Mdadm Add Drive To Raid 5 Yes. 2.

Ask questions about Fedora that do not belong in any other forum. Advertisement Register for Free! joe > unixy.net Reply With Quote 0 11-13-2011,10:07 AM #4 mitgib View Profile View Forum Posts View Forum Threads Visit Homepage Southern Yankee Join Date Sep 2006 Location The Should it not have 3 after removing one of the disks from the array?

Reply With Quote 0 11-22-2011,12:12 PM #39 ttgt View Profile View Forum Posts View Forum Threads Web Hosting Master Join Date Mar 2009 Posts 2,709 Hi,yes,i use centos to Adv Reply June 7th, 2013 #5 darkod View Profile View Forum Posts Private Message Staff Emeritus Join Date Nov 2009 Location Mataro, Spain Beans 13,073 DistroUbuntu 14.04 Trusty Tahr Re: Anyway, my Raid 5 array in mdadm is coming up as degraded and I cannot re-add the the removed disk. So I I got the following output form this command: mdadm -D /dev/md0/dev/md0: Version : 1.2 Creation Time : Sat Apr 16 00:30:53 2011 Raid Level : raid1 Array Size :

The md devices have to be created from something like /dev/sda1, /dev/sdb1, /dev/sda2, /dev/sdb2, etc, not from /dev/dm-X. thanx Reply With Quote 0 11-22-2011,11:36 AM #35 ttgt View Profile View Forum Posts View Forum Threads Web Hosting Master Join Date Mar 2009 Posts 2,709 Hi, i want If you shut the server down and conduct a cold-replacement, the drive will come back as the original drive. Tried that Reply With Quote 0 11-13-2011,07:32 PM #16 funkywizard View Profile View Forum Posts View Forum Threads Visit Homepage Corporate Member Join Date Jan 2005 Posts 9,871 http://www.howtoforge.com/replacing_..._a_raid1_array

This caught my eye: Originally Posted by jtodd I then physically replaced the disk and powered the server back on and using sfdisk recreate the partition table on the disk. I noticed the disk had failed, failed it in mdadm, ejected it in mdadm and powered down the server. Hello everyone, i am setting up a software raid6 for the first time. Browse other questions tagged linux ubuntu raid raid10 or ask your own question.

xaminmo View Public Profile View LQ Blog View Review Entries View HCL Entries View LQ Wiki Contributions Visit xaminmo's homepage! Ubuntu Ubuntu Insights Planet Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Specialised Support Ubuntu Servers, Cloud and Juju Server Platforms Reattaching removed Originally Posted by darkod I would back up the data on external hdd and redo the system if it's not too much trouble for you. So this saved me from dismounting the raid and re-assembling it.

Then, I posted it in several places so I could find it again when it happened to me again. I know it did for me. Reply With Quote 0 11-14-2011,06:35 PM #23 funkywizard View Profile View Forum Posts View Forum Threads Visit Homepage Corporate Member Join Date Jan 2005 Posts 9,871 Originally Posted by Thread Tools Search this Thread Display Modes #1 8th November 2011, 06:46 AM kotomo Offline Registered User Join Date: Nov 2011 Posts: 2 Cannot re-add disk to degraded

Thank you so much for having the CORRECT answer to the problem. You have to do it manually (it's trivial). Originally Posted by SaturnusDJ Try: Code: mdadm --manage /dev/md1 --re-add /dev/diskxx I don't have diskxx entries in /dev, but when I try sudo mdadm --manage /dev/md0 --re-add /dev/dm-0 or sudo mdadm