To recreate: 1. partition two disks sized the same into two equal partitions (2G disk, two 1G partitions each)
# cat /proc/partitions major minor #blocks name 252 32 2097152 vdc 252 33 1048576 vdc1 252 34 1047552 vdc2 252 48 2097152 vdd 252 49 1048576 vdd1 252 50 1047552 vdd2 2. sudo apt install mdadm --no-install-recommends 3. sudo bash -x ./create-mirror.sh 4. cat /proc/mdstat # check that the array's are resyncing 5. sudo mdadm --stop /dev/md1 6. test -e /sys/class/block/md1 If the arrays completely resync before attempting --stop; we don't see the failure; however, if a resync is present then stopping md0 or md1 will succeed but /sys/class/block/mdX/* contains files even if /dev/mdX is not present. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1682456 Title: md devices may leave remnants in /sys/class/block after removal Status in linux package in Ubuntu: Confirmed Bug description: 1. root@x1:~# cat /proc/version_signature Ubuntu 4.4.0-72.93-generic 4.4.49 2. attached 3. # lsb_release -rd Description: Ubuntu 16.04.2 LTS Release: 16.04 4. # apt-cache policy linux-image-`uname -r` linux-image-4.4.0-72-generic: Installed: 4.4.0-72.93 Candidate: 4.4.0-72.93 Version table: *** 4.4.0-72.93 500 500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 100 /var/lib/dpkg/status 5. After stopping an md device, the sysfs and /dev entry should be removed: mdadm --stop /dev/md0 && [ "`test -e /sys/class/block/md0`" = "1" ]; echo $rc should return 0; 6. /dev/md0 is gone, but /sys/class/block/md0 remains I believe this is related to this thread here: https://www.spinics.net/lists/raid/msg54859.html ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.4.0-72-generic 4.4.0-72.93 ProcVersionSignature: Ubuntu 4.4.0-72.93-generic 4.4.49 Uname: Linux 4.4.0-72-generic x86_64 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Apr 12 21:55 seq crw-rw---- 1 root audio 116, 33 Apr 12 21:55 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: N/A Date: Thu Apr 13 14:32:17 2017 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: QEMU Standard PC (i440FX + PIIX, 1996) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-72-generic root=UUID=4c974bc3-8fe8-41b5-a563-23b2dcf974c9 ro console=tty1 console=ttyS0 RelatedPackageVersions: linux-restricted-modules-4.4.0-72-generic N/A linux-backports-modules-4.4.0-72-generic N/A linux-firmware N/A RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: Ubuntu-1.8.2-1ubuntu2 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-yakkety dmi.modalias: dmi:bvnSeaBIOS:bvrUbuntu-1.8.2-1ubuntu2:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-yakkety:cvnQEMU:ct1:cvrpc-i440fx-yakkety: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-yakkety dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1682456/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
