I Expanded the Disk in Disk Manager but It Doesn't Show in Windows Explorer

by techpilot007 2. July 2010 13:55

Over the past few months I’ve been running out of space on a SAN drive in both the production and DR sites running Windows Server 2008.  (That’s one of those expensive growing pains).  We put in a request to have a LUN expanded then waited.  When we were given word that the LUN had been expanded I went into Disk Manager and rescanned the drives.  Disk Manager saw the expanded portion of the disk.  Now I needed to expand the partition.  So I right clicked the drive and chose Extend Volume.

(note: this screen shot for security purposes is not the actual server involved)

Now I had to sit and wait while Windows did its thing.  When it was finished Disk Manager showed a much larger disk. J 

I exited out of Disk Manager and opened My Computer only to find that Windows Explorer was not reporting new size of the disk.  After a little more searching, via Google, I came across this Microsoft article which in the More Information section talks about an undocumented command for Disk Part.

At a command prompt you need to enter the following:

DISKPART> List Volume
DISKPART> select volume # (this is the number of the volume listed by the above ‘List Volume’ command)
DISKPART> extend filesystem

Now Windows Explorer shows the new expanded size of the disk.

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Welcome to the blog of an Configuration Manager. This blog is meant to share my thoughts, ideas, and the story of my ever expanding journey to acquire knowledge. It may, at times, include rants about or an expression of excitement over something in the computer realm. The majority of my work is with Windows servers. However, it has started to also include Linux machines. Lately I’ve become the Nagios “expert” within our company as I work towards creating culture of being proactive vs. reactive in regards to Application/Configuration Management.


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