Public bug reported: Steps to reproduce (VirtualBox is fine for testing):
1. Get a server with 4 disks 2. Start Ubuntu server install 3. Partition all disks with msdos partition tables and create one big partition starting at 1 MB on each disk. 4. Create mdadm RAID5 block device from these partitions 5. Create LVM volume group on RAID5 6. Create LVM volume on the group 7. Create root file system on the LVM volume 8. Install system on the root file system 9. Boot the system (works fine despite all the files inside RAID5 because grub is smart enough) 10. Run sudo dpkg-reconfigure grub-pc and install grub on all physical disks (sd*) 11. Shutdown the system 12. Disconnect the first hard drive 13. Boot the system Expected results: System boots with degraded RAID Actual results: Initrd scripts hang during boot (grub boots okay). Caused by incorrect fix in https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1635049 $ apt-cache policy mdadm mdadm: Installed: 3.3-2ubuntu7.2 Candidate: 3.3-2ubuntu7.2 Version table: *** 3.3-2ubuntu7.2 500 500 http://fi.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 100 /var/lib/dpkg/status 3.3-2ubuntu7 500 500 http://fi.archive.ubuntu.com/ubuntu xenial/main amd64 Packages Note that this bug is fixed mdadm version 3.4 but Ubuntu Xenial still has version 3.3. Installing mdadm package from Ubuntu 16.10 fixes the problem. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: mdadm 3.3-2ubuntu7.2 ProcVersionSignature: Ubuntu 4.8.0-53.56~16.04.1-lowlatency 4.8.17 Uname: Linux 4.8.0-53-lowlatency x86_64 ApportVersion: 2.20.1-0ubuntu2.6 Architecture: amd64 CurrentDesktop: X-Cinnamon Date: Wed Jun 28 11:25:03 2017 InstallationDate: Installed on 2015-02-23 (855 days ago) InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1) MDadmExamine.dev.sda: Error: command ['/sbin/mdadm', '-E', '/dev/sda'] failed with exit code 1: mdadm: cannot open /dev/sda: Permission denied MDadmExamine.dev.sdb: Error: command ['/sbin/mdadm', '-E', '/dev/sdb'] failed with exit code 1: mdadm: cannot open /dev/sdb: Permission denied MDadmExamine.dev.sdc: Error: command ['/sbin/mdadm', '-E', '/dev/sdc'] failed with exit code 1: mdadm: cannot open /dev/sdc: Permission denied MDadmExamine.dev.sdd: Error: command ['/sbin/mdadm', '-E', '/dev/sdd'] failed with exit code 1: mdadm: cannot open /dev/sdd: Permission denied MDadmExamine.dev.sde: Error: command ['/sbin/mdadm', '-E', '/dev/sde'] failed with exit code 1: mdadm: cannot open /dev/sde: Permission denied MDadmExamine.dev.sdf: Error: command ['/sbin/mdadm', '-E', '/dev/sdf'] failed with exit code 1: mdadm: cannot open /dev/sdf: Permission denied MDadmExamine.dev.sdf1: Error: command ['/sbin/mdadm', '-E', '/dev/sdf1'] failed with exit code 1: mdadm: cannot open /dev/sdf1: Permission denied MDadmExamine.dev.sdg: Error: command ['/sbin/mdadm', '-E', '/dev/sdg'] failed with exit code 1: mdadm: cannot open /dev/sdg: Permission denied MDadmExamine.dev.sdg1: Error: command ['/sbin/mdadm', '-E', '/dev/sdg1'] failed with exit code 1: mdadm: cannot open /dev/sdg1: Permission denied MDadmExamine.dev.sdg2: Error: command ['/sbin/mdadm', '-E', '/dev/sdg2'] failed with exit code 1: mdadm: cannot open /dev/sdg2: Permission denied MDadmExamine.dev.sdh: Error: command ['/sbin/mdadm', '-E', '/dev/sdh'] failed with exit code 1: mdadm: cannot open /dev/sdh: Permission denied MDadmExamine.dev.sdh1: Error: command ['/sbin/mdadm', '-E', '/dev/sdh1'] failed with exit code 1: mdadm: cannot open /dev/sdh1: Permission denied MachineType: System manufacturer System Product Name ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-53-lowlatency root=UUID=254cacdb-f61b-45a6-9885-37afd2b598ce ro quiet splash vt.handoff=7 ProcMDstat: Personalities : [raid0] [linear] [multipath] [raid1] [raid6] [raid5] [raid4] [raid10] md0 : active raid0 sdd[3] sdc[2] sda[0] sdb[1] 781443840 blocks super 1.2 64k chunks unused devices: <none> SourcePackage: mdadm UpgradeStatus: Upgraded to xenial on 2016-06-10 (383 days ago) dmi.bios.date: 02/04/2013 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1101 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P8H77-M PRO dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev X.0x dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1101:bd02/04/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer etc.blkid.tab: Error: [Errno 2] No such file or directory: '/etc/blkid.tab' ** Affects: mdadm (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1700921 Title: Boot with degraded RAID5 still fails on Ubuntu 16.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/1700921/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
