Details
Description
Bug explained in detail here:
https://bugs.launchpad.net/ubuntu/+source/open-iscsi/+bug/1729000
Several XenServer 7.2 users have confirmed the bug here:
https://discussions.citrix.com/topic/389536-cant-readwrite-to-new-iscsi-storage-xenserver-72/
This blog article states that it's due to a change in the Linux 4.4 kernel default value, from 512KB to 1280KB:
http://longwhiteclouds.com/2016/03/06/default-io-size-change-in-linux-kernel/