Fusiondrive. Kill the hdd part only.

[Tjosansa]

Im buying fushiondrive.
But later on when ssd becomes cheaper and i dont want to hear any moving parts in my imac, but fans. Is it possible in the future to turn off the hdd part and only run the 128. Gb ssd part in the machine.
Then i could get external ssd usb3 drive also.

 

[maflynn]

Here's an article on how to split a Fusion drive. Macworld.

 

[AaronM5670]

If you want to do this, and if you haven't ordered your machine yet, why not get the 256GB all-SSD BTO option (same price as 1TB Fusion drive) and then get an external drive for (1TB) $70 or so? With your method, you'll only have 128GB in terms of SSD storage which is very little, especially in a desktop.

 

[Fishrrman]

If you have a fusion drive, you CAN'T spin down the HDD part of the drive. At least spin it down "by your command". The fusion setup may sleep and un-sleep the drive as it needs, but not you.

If this is what you truly want, don't get fusion.

The only alternative would be to "break" the fusion using terminal -- that is, to "de-fuse" the setup.

You'll have to restore everything afterwards, however.

The iMac, even with a HDD inside, is so close to being silent that I can't see why you'd want to do this. Are you going to shut off the fan, too?

 

[Tjosansa]

Just wanted to see if there was a way incase i wanna do it in the future.
Just checking my options.

 

[jg321]

If you want to do this, and if you haven't ordered your machine yet, why not get the 256GB all-SSD BTO option (same price as 1TB Fusion drive) and then get an external drive for (1TB) $70 or so? With your method, you'll only have 128GB in terms of SSD storage which is very little, especially in a desktop.

This is what I've done, for the same reasons as the OP.

 

[AaronM5670]

This 1TB USB 3.0 Western Digital HDD is just $69.99 and has very positive reviews. Only the black model is this cheap though. A 2 year Amazon warranty is just $6 as well.