Source: linux-tools Version: 3.16+63 Severity: normal the Linux kernel sources include in the tools/hv directory tools for using Linux in MS Hyper-V virtual machines.
The tools include hv-fcopy-daemon, hv-kvp-daemon, hv-vss-daemon Especially hv-vss-daemon is needed to be able to use Hyper-V "Live virtual machine backup" with Windows Server 2012 R2. https://technet.microsoft.com/en-us/library/dn614985.aspx says that this is not supported in Debian. It is supported in Ubuntu as they have packaged the daemons in their linux-cloud-tools. Red Hat supports it in the hyperv-daemons package and its dependents. Failing to run this daemon in a VM where the backup is done via live virtual machine backup might lead to filesystem corruption. We had this now several times in our Hyper-V cluster. The linux kernel gets an I/O error while trying to access the device, leading normaly to a readonly mount of the filesystem. The filesystem has to be manually checked. Once we got a filesystem which was totally corrupted so that no fsck was possible. It would be a good idea to have this as soon as possible for jessie. -- System Information: Debian Release: 8.0 APT prefers testing-updates APT policy: (700, 'testing-updates'), (700, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)
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