A minimum of 1 GB is recommended (and somewhat enforced with back pressure) 
starting with Exchange 2007. [[Note that back pressure is a lot more than that 
and blah blah blah. But you get the point.]]

Exchange 2003 and before would just run and run until the disk was full. Oops.

You need enough disk space to mount the database and allow it to process 
whatever changes (that is - generate additional log files) are required to 
perform the mount. That's going to generate a minimum of two log files (in 2007 
and above; perhaps just one in 2003). It'll also start immediately processing 
the storeQ and the transportQ (unless the Transport service is stopped in 2007+ 
or the SMTP service in 2003 and before) which will generate more log files....

So....I'm a 10%-er minimum.

Regards,

Michael B. Smith
Consultant and Exchange MVP
http://TheEssentialExchange.com


-----Original Message-----
From: Sean Martin [mailto:[email protected]] 
Sent: Thursday, August 12, 2010 5:10 PM
To: MS-Exchange Admin Issues
Subject: Re: Log Drive Full

So 10% would be roughly 24-25GB free space. Far cry from the 750MB he has...

I'm curious to know if there's a specific free space recommendation or 
requirement in this scenario.

- Sean


On Aug 12, 2010, at 12:55 PM, Kurt Buff <[email protected]> wrote:

> Cool. I believe that's what MBS was getting at.
>
> If it were me, I'd move a few hundred of the latest log files to a 
> different partition, then start compressing the oldest log files, a 
> few hundred at a time, and when you have a bunch of them compressed 
> (maybe a thousand or so) move the files back that you placed 
> elsewhere, and keep going with your compression, until you have free 
> disk space equal to some significant fraction of your total partition 
> space - I'd guess about 10% free, but others will have a better answer 
> on that exact number. At any rate, once that amount of free space is 
> obtained, backups will work, and log files will disappear.
>
> This will take some time, but it's certainly a very clean way of 
> getting this done.
>
> I definitely wouldn't highlight the log directory and compress the 
> entire directory. - that will cause other problems.
>
> Stay the course.
>
>
> Kurt
>
> On Thu, Aug 12, 2010 at 13:41, Chris Blair <[email protected]> 
> wrote:
>> Windows built in compress
>>
>



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