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Veeam ReFS Repository on iSCSI Targets

Troubleshooting Repository Deadlocks

With Resilient Filesystem (ReFS) integration into Veeam Availability Suite 9.5 a whole bunch of features was integrated. One of the biggest advantages is ‘Fast Cloning Technology’ which enables synthetic full backups by merely creating pointers to already existing datablocks on the repository.

In a small scale environment I had a hardware repository server (Win 2016) with an iSCSI Volume as repository (ReFS, 64k) as primary backup target. This constellation worked like a Swiss watch. Daily backups ran for months without any trouble. Fast cloning technology enabled weekly synthetic full backups with minimal consumption of extra space.

Recently I’ve added another iSCSI Volume (ReFS, 64k) to be used as repository for backup copies. That’s when the fun began… „Veeam ReFS Repository on iSCSI Targets“ weiterlesen

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Brocade FOS Default Passworte ändern

Brocade Fibrechannel Switches mit dem Fabric OS (FOS) werden standardmäßig mit den Benutzerkonten admin, root, user und factory ausgeliefert. Es ist wichtig, diese Default Passworte bei der ersten Konfiguration zu ändern.

Die Logins der Konten root, user und factory ändert man am schnellsten über SSH.

Login als user ‘root’ mit Default-Password ‘fibranne’

Bei erstem Login werden neue Passwörter für root, user und factory abgefragt. Mit <ENTER> startet man diesen Dialog, mit Ctrl-C bricht man ab. Bei nächstem Login wird man erneut zur Kennwortänderung aufgefordert.

Kontrolle der Nutzerkonten

userconfig --show -a

Hiermit werden alle lokalen Konten mit Status dargestellt.

 

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vMotion fails at 21% with error 195887371

How to troubleshoot vMotion issues

Troubleshooting vMotion issues is in most cases a matter of networking issues. I will demonstrate in this case how to trace down the problem and how to find possible culprits.

What’s the problem?

Initiating a host vMotion between esx1 and esx2 passes all pre-checks, but then fails at 21% progress.

Migrate virtual machine:Failed waiting for data. Error 195887371. The ESX hosts failed to connect over the VMotion network.

See the error stack for details on the cause of this problem.
Time: 07.01.2018 19:08:08
Target: WSUS
vCenter Server: vc
Error Stack
Migration [167797862:1515348488969364] failed to connect to remote host <192.168.45.246> from host <10.0.100.102>: Timeout.
vMotion migration [167797862:1515348488969364] vMotion migration [167797862:1515348488969364] stream thread failed to connect to the remote host <192.168.45.246>: The ESX hosts failed to connect over the VMotion network
The vMotion migrations failed because the ESX hosts were not able to connect over the vMotion network. Check the vMotion network settings and physical network configuration. 
Migration [167797862:1515348488969364] failed to connect to remote host <10.0.100.102> from host <192.168.45.246>: Timeout.
vMotion migration [167797862:1515348488969364] failed to create a connection with remote host <10.0.100.102>: The ESX hosts failed to connect over the VMotion network
Failed waiting for data. Error 195887371. The ESX hosts failed to connect over the VMotion network.

„vMotion fails at 21% with error 195887371“ weiterlesen