Logical Drive not on preferred path due to ADT/RDAC failover . Cause: - When a Fibre Channel switch fails or loses power, LUNs on the disk storage subsystems can show errors indicating that they are not on their preferred path. This causes errors to be shown in the Information Archive administrative interface . Faulty Hardware. The controller failed a manually initiated diagnostic test and was Regional Driving Assessment Centre Patricks Farm Meriden Road Hampton in Arden B92 0LT p: 0300 300 2240 p: 0121 359 4222 e: [email protected] w: www.rdac.co.uk A failback scan will cause the RDAC driver to reattempt communications with any failed controllers. An avt scan causes the RDAC driver to check whether AVT has been enabled or disabled for an entire storage array. A busscan scan causes the RDAC driver to go through its unconfigured devices list to see if any of them have become configured. A forcerebalance scan will cause the RDAC driver to When the failed controller obtains optimal status, storage array rebalance is performed automatically without user intervention. Note – The RDAC driver cannot co-exist with an HBA-level failover driver such as This study retrospectively reviewed patients who underwent RDAC flap reconstructions for failed finger replantations and assessed the outcomes of these procedures. Patients and methods. Of the patients who had undergone soft tissue reconstruction of failed finger replantation between March 2011 and February 2015, 11 patients (7 men and 4 women) who underwent RDAC flap reconstruction were # multipath -v2 sdd: checker msg is "rdac checker reports path is down" /sbin/scsi_id exitted with 1 cannot get the the wwid for sdd sdg: checker msg is "rdac checker reports path is down" /sbin/scsi_id exitted with 1 cannot get the the wwid for sdg [RAIDarray.mpp]MY_NICE_STORAGE_ARRAY:1:0:7 Cmnd-failed try alt ctrl 0. vcmnd SN 2436 pdev H1:C0:T0:L7 0x05/0x94/0x01 0x08000002 mpp_status:1. The 0x02 is the status byte set to CHECK CONDITION, which means we have a problem, the driver byte is 0x08 which can be anything the vendor wants iirc. I don't know what 0x05/0x94/0x01 stands for, ask Jun 24 17:57:49 ninja multipathd: 8:32: mark as failed Jun 24 17:57:49 ninja multipathd: mpath8: remaining active paths: 3 Jun 24 17:57:49 ninja multipathd: dm-3: add map (uevent) Jun 24 17:57:49 ninja kernel: end_request: I/O error, dev sdd, sector 530184 Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Failing path 8:48. Jun 24 17:57:49 ninja kernel: device-mapper: multipath: Cannot The errors you are seeing ("C9 inquiry of device <device> failed") are caused by the rdac priority callout being used against devices that are not RDAC-capable. In your case, you have 2 different storage arrays: IBM 2810XIV (non-RDAC) and IBM 1818 FAStT (RDAC). However, you have configured this in your defaults section: prio_callout "/sbin/mpath_prio_rdac /dev/%n" This means that any device I tried to run the test with the fix yesterday, but it looks like the test failed after several storage controller firmware upgrade. When looking at one of the failed
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