For one of my projects I needed to create a simple CheckedListbox containing various entries of a specific entity, of which the user may select one (and only one). I wanted the entries of this listbox to be more than just the instance name of an entity; they should also include a description and optionally other data depending on the type of entity. And I wanted these items to be lined up.

One way to do this is to use a gridview, but it was too much hassle and gridviews generally don’t look very good. Should you consider this choice: note that the checked listbox I use does not have columnheaders.

There is an out-of-the-box way to line up the various items in each line of the checked listbox. This post will tell you how to achieve this.

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After P2V: disk error “the disk is offline because of a policy set by an Administrator”

After a P2V from a Windows 2008 Enterprise server to a VM with Virtual Hardware 7, I get the following error in disk Management : the disk is offline because of a policy set by an Administrator.

I’d look in to the policies, the user and server had no policies set on them. So what now….

I found out that the default SAN Policy for Windows Server 2008 Enterprise is set to “Offline Shared”

How to check:

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Author: Ingmar Verheij

A Synology NAS can be used as a FTP server out-of-the-box (after enabling it), but there is no FTP client installed that can be used from a interactive shell. You can install a FTP client, lftp by Alexander Lukyanov, using ipkg.

If you haven’t installed ipkg yet, please install it first (link).

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Author: Ingmar Verheij

If you want to install additional packages on your Synology NAS you first need to install ipkg. In this post I’ll explain the steps you need to take to install this package on your Synology NAS.

If you don’t have terminal access, please enable that first (link).

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Author: Ingmar Verheij

For certain (more complex) tasks you might need terminal access to your Synology NAS. Enabling terminal access to your Synology NAS is done quite easily.

You can enable both Telnet (non encrypted – insecure) or SSH (encrypted – more secure) access.

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Author: Ingmar Verheij

When you try to remove a (sealed) management pack from System Center Operations Manager (SCOM) you get the following error:

This is caused by an override that is targeted on the management pack you want to delete (for instance Citrix Library) and is stored in the Default Management Pack, which is NOT a best-practice. Even after deleting all overrides from the DMP the message does not disappear.

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Author : Ingmar Verheij

System Center Operations Manager (SCOM) agents are by default allowed to only return data from the same source. If the agent needs to submit data from another source, for instance in a cluster, the security feature ‘Agent Proxy’ needs to be enabled. By default this feature is disabled.

If you create (or import) a management pack that relies on this feature, for example when the management pack submits data from another source, you might want automate this.

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Author: Ingmar Verheij

When creating a report in System Center Operations Manager (SCOM) showing performance data you’ll need to make a decision about the data you’re going to show. Will you use raw data (Perf.vPerfRaw), hourly aggregated data (Perf.vPerfHourly) or daily aggregated data (Perf.vPerfDaily).

Do you want to show detailed information or for a longer period? The most detail can be achieved with the data stored in Perf.vPerfRaw but this comes at a cost, the time to query the database and render the report increases massive. So if you want to show data for a longer period (like over a week) you’ll probably better use the data stored in Perf.vPerfDaily.

But what if you want the user the ability to change the date range? If the user specifies a small range (for instance a day) you want high detail, but when the range is increased (for instance a month) less detail is required.

Unfortunately the reports created in the Business Intelligence Development Studio (BIDS) does not allow you to create a conditional SQL statement. So in order to achieve this, a stored procedure needs to be created.

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Author: Ingmar Verheij

After importing a management pack in System Center Operations Manager (SCOM) it might take a while until it is visible in the Operations Console. When developing a management pack (and especially when creating reports) this is frustrating since there are numerous reasons why the management pack isn’t working as expected.

A common reason why the management pack (and the associated reports) aren’t showed in the Operations Console is because the management packs are queued awaiting synchronization.

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A user reported that the following error while visiting a website on a Citrix XenApp server:

I tried adding the site to the Trusted Sites List and adding the url to the Per Site Privacy list:

But this didn’t work, but I noticed that the site was “flickering” a lot so I suspected that HDX Flash Acceleration was the problem.

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