Hi Ronni

Thanks for the information. Can I paraphrase your general comments to my 
particular set up - and ask more detail?

Creating a new partition: 
Is this a task suited to Disk Utility, or is a commercial application 
recommended?  DU is scary here - it says “to erase and partition the selected 
disk …” etc.  I don’t want to erase or interfere with the boot drive; just 
create a second visible partition for movie  backups in sparse image format.  
Are the hidden partitions used for OS X Recovery ignored for this exercise - do 
I just select the 2-partition option?   Is the procedure for partitioning the 
same for Fusion drives and standard drives?

Removing a partition: 
Are these tasks suited to Disk Utility?  (One commercial app I skimmed would 
create partitions, but not remove them.)   After data is removed and partition 
erased, is it a simple matter to re-size the original (OS X) partition?   

Cheers
Alan

 
On 14 Dec 2014, at 5:04 pm, Ronda Brown <[email protected]> wrote:

> 
> On 14 Dec 2014, at 4:28 pm, Alan Smith <[email protected]> wrote:
> 
>> Hello all,
>> 
>> I had some success with the Sparse Image question.  My questions about 
>> creating (and later removing) a partition on the internal hard drive (with 
>> OS X) still stands.  
> 
> Hello Alan,
> CREATE A NEW PARTITION
> As shipped by Apple, your boot disk has a single partition. (You can think of 
> hard disk partitions as similar to rooms in a house. Right now, your “house” 
> stores all your files in a single room filled with file cabinets.)
> Partitioning allows you to create multiple rooms. The only problem is that 
> all these different rooms must fit into the space of the original house. So, 
> partitioning allows you to create multiple rooms, but it doesn’t expand the 
> total storage space available to you.
> NOTE: In the past, we would partition drives to organize our files. This is 
> no longer a good idea, because there’s a performance hit in moving between 
> different partitions. While partitioning the boot drive still makes sense, 
> partitioning for data storage does not.                                       
>          
> REMOVING A PARTITION
> Removing a partition will erase all the data that is stored on it; so be 
> SURE!!! you have moved all essential data to another drive. (Removing a 
> partition will not affect any other partition on the same, or any other, hard 
> drive.
> Cheers,
> Ronni
> Sent from Ronni's iPad4
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