Is there standard criteria for judging when to upgrade server hard drive space?


Given the hard disk capacity and space currently being used, is there a standard percentage that is used as a baseline for determining when to upgrade hard drive space?  For example, if the space capacity is 107 GB, used is 79.9 GB, and free space is 27.3 GB, at what point would available space start to be a concern?  This is a small company with currently less than 15 employees but is slowly growing.  We're using a Dell Poweredge Server.

Thanks for your time!

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Lee W, MVPTechnology and Business Process AdvisorCommented:
Nothing standard I've ever heard recommended.  I Think you have to analyze this....

1.  How FAST is the data growing? (If the average week generates 1 GB of new data, then you 4.5 months before you're out.  If the average week does 100 MB of new data, then you have nearly 4 years to worry about it.  AND in 4 years, you'll probably want a new server).
2.  How FAST MIGHT it grow?  (If they get a new project, could it cause them to add 20GB in a week - or would it just jump a few MB?)

I always start to look to upgrade when I reach 80% or less than 2 months capacity growth (as a MINIMUM!!)

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dweb937Author Commented:
Thanks for both your responses.

If I haven't been tracking disk space usage over months/years, is there a way to determine this now?   Probably stupid question.

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Not really. You'd have to have kept records of this soret of thing. The files/folders dates are no indication these are totally useless. Fraid your out of luck there. Best start planning when you reach 80%-90%. Bigger disks are available via Dell, just make sure you have a FULL backup (and have tested it to make sure it's good), before any upgrade.
dweb937Author Commented:
Ok, thanks!!!  I'm going to split the points between both of you.
Lee W, MVPTechnology and Business Process AdvisorCommented:
Not really... not reliably.  just start tracking it now.  Make a folder for storing this information on one of the logical drives and schedule a script with the following for line, one for each drive letter (Note: there are TWO drive letter references in the for line below:

Set DataPath=C:\Usage\
for /f "tokens=3" %%a in ('dir c:\ ^| find /i "Dir(s)"') do @echo Drive C: Free Space on %date% is %%a Bytes>%datapath%%date:~-4%%date:~4,2%%date:~7,2%.log

This will create a file based on the current date in the folder Usage that contains the data in text files.  Stick the information in Excel each week and and you'll get an idea.  You know what you have now... you know how long you've had it and based on that, I'd suggest you can reasonably guess how much longer you have.  Even if you've only been with the company a year, if they used up that entire 80GB in 1 year, then you know they use AT MOST, 1.5 GB a week right now, so you have at least a couple of months to worry about it.
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