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Xen 4.13 HVM and xvd



Hello, has anyone else had problems with Xen 4.13 and using xvd* when specifying storage devices with HVMs? This did not seem to be an issue previously with NetBSD 8.*/7.* with Xen 4.11, but has manifested when upgrading to NetBSD 9.1 with Xen 4.13 on two different machines. In one instance, the use of xvd* caused the host to crash and restart. In other instances, the HVM BIOS will be unable to recognize the devices as valid BIOS partitions and enter into a loop of trying different boot devices. Changing the storage devices in the Xen configuration file to use sd* will work around the issue, but require existing installations to be modified to use that specific device.

Only HVMs are used on these Xen hosts, so other VM types have not been tested. If I remember correctly, one of the hosts was upgraded to NetBSD 9.1, while still retaining Xen 4.11, and no issues where experienced, so the problem occurred with the migration to Xen 4.13 .
-Tim


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