Solved

From Storage Navigator/CLI/or ? how to view LUN space utilization details (how much space is being utilized on a LUN)

Posted on 2008-10-29
1
956 Views
Last Modified: 2013-11-14
I use storage navigator to administer the AMS1000 SAN and wanted to know how to get LUN space utilization statistics from the SAN side to see how much space is being utilized on each LUN.  How would I accomplish this without having to look at the hosts.
0
Comment
Question by:zarcow
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 3

Accepted Solution

by:
VXDguy earned 250 total points
ID: 22837109
The closest you can get to seing LUN space utilization would be to use something like Dynamic Provision which would show how much of the LUN space has been written to by the OS.

Dynamic Provisioning is like VMWare virtual disk container files.  They start out zero bytes long and grow up to a preset max size as the OS is using the space.  DP does the same and pull the space from a disk pool, and yes, you can allocate more space than you really have.

Also this feature is *NOT* available on a HDS AMS 1000.  You can get Dynamic Provisioning as an option on the enterprise arrays (USPV and USPVM).  That said, I'm still not sure there's a HiCommand (v6.0.2) API to look at LUN size utilization for a DP LUN.

Even with DP based LUN allocation, the space report will be inaccurate.  If you write a 12GB file to the hard drive, then delete it, the filesystem shows +12GB space.  The DP LUN shows -12GB space because once you touch a track, it's allocated to the server for good.  Doesn't matter if you erase it, that's a logical filesystem operation, you can't "give back" the track and put it into the pool.

So without DP available on your disk array, the only way to see LUN space utilization would be to ask the host.  Of course, you could covert your AMS1000 to a NAS server
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The question appears often enough, how do I transfer my data from my old server to the new server while preserving file shares, share permissions, and NTFS permisions.  Here are my tips for handling such a transfer.
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question