Fusion Drive NAND Sizes

[adamjackson]

via Wikipedia:

-----

I am upgrading from a late 2012 iMac 1TB Fusion Drive that appears to have had a 128GB NAND (TIL). I was going to buy a 3TB Fusion Drive and this certainly makes the decision easier that the 1TB actually had a NAND reduction from 128GB to 24GB 3 years later (WTF apple)?

Either way, looks like the 3TB option has 128GB. Any way for me to add a new drive to my iMac w/ a larger NAND or is 128 the largest?

 

[Samuelsan2001]

via Wikipedia:

-----

I am upgrading from a late 2012 iMac 1TB Fusion Drive that appears to have had a 128GB NAND (TIL). I was going to buy a 3TB Fusion Drive and this certainly makes the decision easier that the 1TB actually had a NAND reduction from 128GB to 24GB 3 years later (WTF apple)?

Either way, looks like the 3TB option has 128GB. Any way for me to add a new drive to my iMac w/ a larger NAND or is 128 the largest?

Well they are separate drives so you could just get the HDD replaced with a 3tb, also I think that that model has a SATA connected SSD so you can put any SSD in you like.

 

[maflynn]

Either way, looks like the 3TB option has 128GB. Any way for me to add a new drive to my iMac w/ a larger NAND or is 128 the largest?

The Mac is sealed so its not an easy process, but check out ifixit.com and they have a guide and the tools to upgrade your mac. Personally, I'd not do it while its under warranty.

As for the Fusion drive, its not a single unit, but two separate drives, that are "fused" together or to put it another way joined logically so they appear as a single unit. What makes this different then say a RAID configuration is that OS will decide what data blocks go on the faster flash ram, vs the slower hard drive.

 

[adamjackson]

As for the Fusion drive, its not a single unit, but two separate drives, that are "fused" together or to put it another way joined logically so they appear as a single unit.

ah, I honestly thought Apple was using drives like this -

http://www.amazon.com/Seagate-Deskt...ybrid drive&qid=1458923747&ref_=sr_1_1&sr=8-1

Seagate 2TB Desktop Gaming SSHD(Solid State Hybrid Drive

Where it's an SSD inside of the HDD and reports to the disk manager as a single drive. I didn't know the 128GB NAND was on the logic board and OS X was looking at it as a single logical drive. Good to know.

 

[maflynn]

Initially I thought the same thing but those are hybrid drives.