5 Replies Latest reply on Sep 14, 2018 11:04 AM by vadm168

    Unsupported ioctl 62 and 63

    vadm168 Novice

      Hi,

       

      My vmkwarning.log file has many entries like:

       

      WARNING: CBT: 1102: Unsupported ioctl 62

      WARNING: CBT: 1102: Unsupported ioctl 63

       

       

      There are KBs describing similar "Unsupported ioctl" log entries for numbers other than 62 and 63. What do number 62 & 63 mean? I can't find any document that explains what these numbers are for. Have anyone had experience on these particular numbers?

       

      Thank you.

        • 1. Re: Unsupported ioctl 62 and 63
          rsk007 Enthusiast

          Cause: This issue occurs when certain vSCSI filters query virtual disks. Some types of disks (for example, snapshots) do not support ioctl requests and a warning appears in the vmkernel.log file.
          Resolution: These warning messages are harmless and can be safely ignored.

           

          Refer: ESXi host reports the error: unsupported ioctl (2058568)   VMware Knowledge Base

          1 person found this helpful
          • 2. Re: Unsupported ioctl 62 and 63
            SupreetK Expert

            1) What is the version of ESXi?

            2) Share 2-3 lines reported before and after the unsupported ioctl messages from the vmkernel.log.

             

            Cheers,

            Supreet

            • 3. Re: Unsupported ioctl 62 and 63
              vadm168 Novice

              Hi rsk007,

               

              That KB does not include 62 and 63 as being the numbers that are safe to ignore.

               

              Hi SupreetK,

               

              It's ESXi 6.5.

               

              Here are a couple of examples. I take the snippets based on the cpu# assuming the operations are related for that CPU during that short timeframe.

               

              2018-08-17T02:49:38.669Z cpu47:73886)CBT: 1310: Created device 2eae90a79-cbt for cbt driver with filehandle 12531075705

              2018-08-17T02:49:38.669Z cpu47:73886)WARNING: CBT: 1102: Unsupported ioctl 63

              2018-08-17T02:49:38.669Z cpu47:73886)WARNING: CBT: 1102: Unsupported ioctl 62

              2018-08-17T02:49:38.671Z cpu47:73886)CBT: 722: Disconnecting the cbt device 2eae90a79-cbt with filehandle 12531075705

               

              2018-08-17T05:03:41.243Z cpu68:73886)CBT: 1310: Created device 2e7490a82-cbt for cbt driver with filehandle 12470258306

              2018-08-17T05:03:41.243Z cpu68:73886)WARNING: CBT: 1102: Unsupported ioctl 63

              2018-08-17T05:03:41.243Z cpu68:73886)WARNING: CBT: 1102: Unsupported ioctl 62

              2018-08-17T05:03:41.243Z cpu68:73886)VSCSI: 3801: handle 10435(vscsi0:1):Creating Virtual Device for world 73658 (FSS handle 12456233604) numBlocks=629145600 (bs=512)

              2018-08-17T05:03:41.243Z cpu68:73886)VSCSI: 273: handle 10435(vscsi0:1):Input values: res=0 limit=-2 bw=-1 Shares=1000

              2018-08-17T05:03:41.243Z cpu68:73886)Vmxnet3: 17293: Disable Rx queuing; queue size 512 is larger than Vmxnet3RxQueueLimit limit of 64.

              2018-08-17T05:03:41.243Z cpu68:73886)Vmxnet3: 17651: Using default queue delivery for vmxnet3 for port 0x300002b

              2018-08-17T05:03:41.243Z cpu68:73886)NetPort: 1662: enabled port 0x300002b with mac 00:50:56:b0:76:e1

               

              Thanks,

              1 person found this helpful
              • 4. Re: Unsupported ioctl 62 and 63
                jishnust Enthusiast
                VMware Employees

                These are the same ioctls used to be there in KB: VMware Knowledge Base

                KB is updated with version specific ioctl numbers which may be observed in the log and can be safely ignored.

                • 5. Re: Unsupported ioctl 62 and 63
                  vadm168 Novice

                  Yes. It was updated recently.

                   

                  Last Updated: Sep 14, 2018

                   

                  Last time I checked, 62 and 63 were not there. Thanks,