So here's your problem, which I identified by running wireshark on the pcap (very helpful, thanks for providing), typing 'iscsi' to filter on that only and identified the inquiry exchange.
The inquiry cmd open-iscsi send looks fine. The response from the target however... 0060 00 00 00 00 00 00 7f 00 05 00 00 00 00 00 00 00 ........ ........ 0070 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........ 0080 00 00 00 00 00 00 00 00 00 00 ........ .. Definitely no make and model information there... Wireshark was so kind as to translate it for me. Peripheral: 0x7f, Qualifier: Device type is not supported by server, Device Type: Unknown or no device type 011. .... = Qualifier: Device type is not supported by server (0x03) ...1 1111 = Device Type: Unknown or no device type (0x1f) So sure it's advertising a lun, but when we reach out in touch it we get garbage. This is decidedly SAN side. That Centos "works" at all is simply a race condition *or* it has a quirk allowance for your SAN, which you have yet to articulate. Contact your SAN vendor to determine why it's responding this way. ** Summary changed: - Fails to connect to iSCSI target + iSCSI target returns "Device type is not supported by server", discovery fails. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1034015 Title: iSCSI target returns "Device type is not supported by server", discovery fails. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1034015/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
