Hello Nab, just when I did the evaluation of my todays class, the target 'crashed' I could resolve the issue by rebooting the target. In the log files I got: Oct 11 11:53:56 node-62 kernel: [219465.151250] ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: 5488 Oct 11 11:53:56 node-62 kernel: [219465.151261] ABORT_TASK: Found referenced iSCSI task_tag: 5494 Oct 11 11:53:56 node-62 kernel: [219465.151264] ABORT_TASK: ref_tag: 5494 already complete, skipping Oct 11 11:53:56 node-62 kernel: [219465.151267] ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: 5494 Oct 11 11:53:56 node-62 kernel: [219465.151271] ABORT_TASK: Found referenced iSCSI task_tag: 5495 Oct 11 11:53:56 node-62 kernel: [219465.151273] ABORT_TASK: ref_tag: 5495 already complete, skipping Oct 11 11:53:56 node-62 kernel: [219465.151275] ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: 5495 Oct 11 11:54:09 node-62 kernel: [219478.744212] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x00000008 Oct 11 11:54:09 node-62 kernel: [219478.751738] ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: 5508 Oct 11 11:54:23 node-62 kernel: [219492.351282] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x00000013 Oct 11 11:54:23 node-62 kernel: [219492.358819] ABORT_TASK: Sending TMR_TASK_DOES_NOT_EXIST for ref_tag: 5514 Oct 11 11:54:23 node-62 kernel: [219492.630489] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x0000001d Oct 11 11:54:23 node-62 kernel: [219492.638250] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x0000001e Oct 11 11:54:23 node-62 kernel: [219492.646156] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x0000001f Oct 11 11:54:23 node-62 kernel: [219492.653991] TARGET_CORE[iSCSI]: Detected NON_EXISTENT_LUN Access for 0x00000020 ... It looks like the storage forgot about all LUNs. I hope that I can reproduce the issue. We were patching our ESX servers while the problem happened. I'll try to reproduce the issue. https://thomas.glanzmann.de/crash/ Have you seen a similiar issue before? For next week I'll revert back to rtsos which is currently rock stable. Cheers, Thomas -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html