Sun Study Shows 70% of Disk Storage Space Wasted
By mrcoolthreadstm on Jul 08, 2007
We've been working with Randy Chalfant to understand why disk storage space is under utilized (learn more in his blog blogs.sun.com/chalfantblog .
Typically there is far more storage available to users than they appreciate or understand. Sun completed a study performed at 200 user sites globally. In the study, tools were installed to uncover the allocation and utilization efficiency. The results were surprising:70% of disk space is wasted on average.
• 10% of all the capacity found had once been allocated to a server, but the server had gone away for various reasons, without the space been returned free. We define that as allocated but orphaned.
• 15% of all the capacity was allocated but unused. Typically someone had requested space from a storage administrator, but no file system or file was stored. It can also be represented as unused database table space.
• 5% of the space is inappropriate use. This is typically unstructured data commonly JPEG, MPEGS, WAV, AAC, etc., that should not be on the system.
• 40% of the space was inert. This was data that had not been referenced for six months or more.
• That left only 30% of the data been well used, along with some capacity for growth.
OK - so the idea that tape storage is dead becomes more of a fallacy with these findings.