What's the difference between Apple's fusion drives and the hybrid drives Seagate has?
What's the difference between Apple's fusion drives and the hybrid drives Seagate has?
There's one major difference between them. As the OP pointed out, "Fusion" is really just tiered storage, or to use what may be more common computer terms... a "smart JBOD array." It automatically comes with the operating system placed into the 128GB flash partition and moves files that are used the most into flash. Hybrid drives don't have nearly that much NAND and will only make copies of files to place into flash.
Oh, and it's a lot more expensive. 😛 Probably not a surprise since it's most likely a 128GB mSATA drive + 1TB HDD.
So are they using two separate drives or is it a hybrid drive?
The drive couples a 128 GB flash drive with a 1 TB or 3TB hard drive.
It uses two drives, OS files reside on the SSD, frequently used apps,files get moved to the SSD and stick there. All writes go to SSD, a 4GB section carved out for writes, which get deferred to either the spindle (FDD) or go straight to SSD if it is part of a file that already exists.
I had to move some cables and I shut down the mac mini with all my windows open including a Virtual machine running ubuntu 12.10 64bit and on boot up it was instant, even all the windows were right there instantly. and the virtual just popped in.
Now the technology "Core storage" did not exist till 10.7.x and they probably were working on it and felt comfortable introducting this fusion drive tiering during the new hardware that was qualified with 10.8.2 and by then core storage has been tested quite a bit internally.
The drive shows up as one volume. Although it is two separate drives (SSD + FDD)
Definitely worth paying extra for this, its a turn key solution and it works.
No. SRT is caching, so the data is mirrored on both drives, the SSD doesn't net you any additional space.
This piece here from Ars outlines how it is different.
Also, apparently a person can make their own Fusion Drive, which is nice for people that drop their own SSDs into MBPs and hackintosh owners. Or for older Minis... the list goes on.
Is there any article on how roll your own? My MBP has a 128 SSD and 500 HDD in it.
No. SRT is caching, so the data is mirrored on both drives, the SSD doesn't net you any additional space.
This piece here from Ars outlines how it is different.
Also, apparently a person can make their own Fusion Drive, which is nice for people that drop their own SSDs into MBPs and hackintosh owners. Or for older Minis... the list goes on.