** Summary changed: - grub2 fails to install/probe into md device with first drive not active (i.e. hot spare) + grub2 fails to install/probe into md device when drives have moved around
** Description changed: grub2 appears to _sometimes_ ignore md devices with a hot spare: $ cat /proc/mdstat - Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] - md5 : active raid1 sda2[2](S) sdb2[3] sde2[4] - 2925939136 blocks super 1.2 [2/2] [UU] - bitmap: 2/22 pages [8KB], 65536KB chunk + Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] + md5 : active raid1 sda2[0](S) sdb2[1] sde2[2] + 2925939136 blocks super 1.2 [2/2] [UU] + bitmap: 2/22 pages [8KB], 65536KB chunk md6 : active raid1 sdf2[0] sdd2[2](S) sdk2[1] - 3902691136 blocks super 1.2 [2/2] [UU] - bitmap: 1/30 pages [4KB], 65536KB chunk + 3902691136 blocks super 1.2 [2/2] [UU] + bitmap: 1/30 pages [4KB], 65536KB chunk unused devices: <none> $ sudo grub-probe -vvv / 2>&1 | grep -E 'info: Inserting md/|error' grub-probe: info: Inserting md/6 (+0,7805382272) into systemvg (lvm) grub-probe: error: disk `lvmid/5R9E1M-V0xL-pEsR-74zV-3oOm-JorM-hb2Erw/WHUtMx-lZcd-2RmH-WVSk-Z0Et-qiqS-hFBd4u' not found. If I remove the hotspare from md5, everything works normally and I can - install grub again. But md6 has a spare too... ?! + install grub again. + + And if devices have moved around enough internally that the internal + index doesn't match the max count any more, they also become invisible + to grub. For example: + + $ cat /proc/mdstat + Personalities : [raid1] [linear] [multipath] [raid0] [raid6] [raid5] [raid4] [raid10] + md5 : active raid1 sdb2[3] sde2[4] + 2925939136 blocks super 1.2 [2/2] [UU] + bitmap: 2/22 pages [8KB], 65536KB chunk + + Note the "[3]" and "[4]". Unlike mdadm, grub was not checking beyond the + array size. This needs fixing as well. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1912043 Title: grub2 fails to install/probe into md device when drives have moved around To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1912043/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
