Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.11 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.11-rc5 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Tags added: kernel-da-key xenial -- 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/1680774 Title: scsi device that can't be deleted Status in linux package in Ubuntu: Incomplete Bug description: I'm using OpenStack on Ubuntu 14.04 with the 4.4.0-47 kernel. Volumes are being attached over Fibre Channel (qla2xxx adapter) with multipath. About once a month, a compute node fails to detach a volume. After that, the scsi device is left in a semi-deleted state: Normal device: root@cmp02:/sys/dev/block/65:96/device# ls /sys/dev/block/65:80/device block generic scsi_device bsg inquiry scsi_disk delete iocounterbits scsi_generic device_blocked iodone_cnt scsi_level device_busy ioerr_cnt state dh_state iorequest_cnt subsystem driver modalias timeout eh_timeout model type evt_capacity_change_reported power uevent evt_inquiry_change_reported queue_depth vendor evt_lun_change_reported queue_ramp_up_period vpd_pg80 evt_media_change queue_type vpd_pg83 evt_mode_parameter_change_reported rescan evt_soft_threshold_reached rev Half-deleted device: root@cmp02:/sys/dev/block/65:96/device# ls /sys/dev/block/65:96/device block scsi_disk There is nothing interesting in /var/log/messages or /var/log/kern.log. multipath -l gives empty output, which pretty much blocks all operation of OpenStack on that node and forces me to reboot it. Tried issuing rescan on the FC adapters without success. The scsi device seems to be detached from the adapter. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1680774/+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
