diskutil output explained

diskutil output explained

[Georgios Koloventzos]

Hello,

I am running fio to test some virtual machines of mine and I am having some
difficulties.
So my question as it is written on the subject.
What exactly are the output of the --debug=diskutil command?
I have seen the code of diskutil.c but I will like a bit more
explanatory answer.
I am using the 2.1.10 version

Thank you,
George
-- 
Georgios Koloventzos
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Re: diskutil output explained

[Jens Axboe]

On 02/27/2015 06:19 PM, Georgios Koloventzos wrote:
> Hello,
>
> I am running fio to test some virtual machines of mine and I am having some
> difficulties.
> So my question as it is written on the subject.
> What exactly are the output of the --debug=diskutil command?
> I have seen the code of diskutil.c but I will like a bit more
> explanatory answer.

As the option hints at, it's just debug output. Mostly deals with how it 
resolves md/dm devices to the underlying devices, and so forth. So not 
sure there's that much interesting there to you, unless you are trying 
to debug a problem with it.

In general, fio figures out what devices to monitor, and then 
continually opens the stat files and collects the appropriate 
information every 250msecs.

-- 
Jens Axboe