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six demon bag

Wind, fire, all that kind of thing!

2015-12-31

Barracuda Backup Agent for Linux Unattended Installation

Barracuda Networks provide agents for their backup appliance for various operating systems. Unfortunately the Linux agent (unlike the Windows agent) does not come with an option for a silent installation, and it doesn't look like the vendor can be bothered to do anything about it.

Instead of being able specify a path on the commandline (or at least force a silent installaton to the default path) you're always prompted for the path where the agent should be installed:

/tmp # tar xzf barracuda_backup_agent-x.x.x.tar.gz
/tmp # cd barracuda_backup_agent-x.x.x
/tmp/barracuda_backup_agent-x.x.x # ./install
Please choose an installation path, or press enter for default.
[/usr/local/barracuda/bbs]: _

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Posted 01:13 [permalink]

2015-03-12

Repairing a Suspect msdb Database

Sometimes a situation arises where an SQL Server instance comes back up with a database tagged as "suspect". Apparently there is a number of possible causes for this, like transaction log corruption, insufficient memory or disk space, or unexpected shutdowns due to hardware or power failure. In our case the reason was probably a hardware failure, since the database resides on an iSCSI volume, and we were making changes to our iSCSI network. And to make things a little bit more interesting, our msdb database just had to be among the affected databases.

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Posted 19:07 [permalink]

2013-12-20

Automatic Updates Consuming 100% CPU

For a couple months now I've been observing the Automatic Updates service (wuauserv) causing high CPU load on hosts running Windows Server 2003 or Windows XP after new updates had been released. The problem vanished after the updates had been installed.

Apparently this is a problem with the Windows Update Agent, caused by inefficient handling of superseded updates. Installing the latest cumulative Internet Explorer update should resolve the problem.

Posted 12:13 [permalink]

2012-11-17

Importing VMs From external Hyper-V Hosts

I've been working on a project where I needed to migrate (clone actually, in order to maintain a fallback scenario) virtual machines from external (standalone) Hyper-V hosts to a Hyper-V cluster. The external hypervisors were not members of the same domain as the cluster nodes. The networks were separated by a firewall. A trust relationship between the domains was not desired.

System Center Virtual Machine Manager 2012 (SCVMM) supports this scenario, but there are several steps that must be performed to prepare for the migration.

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Posted 20:03 [permalink]