Original Link: http://www.anandtech.com/show/6727/apple-is-using-sandisk-ssds-in-retina-macbook-pro-as-well

There has always been some level of lottery involved when buying an SSD-equipped Mac. The first Mac to start the lottery was the 2010 MacBook Air, which initially used Toshiba's SSDs but later it was found that some units were shipping Samsung SSD 470 based drives. Up until last year Apple kept using the same Toshiba and Samsung SSDs; the 2012 refresh finally brought SATA 6Gbps SSDs to Macs and, of course, another round of lottery too. The 2012 MacBook Air kept using drives from both Toshiba and Samsung, albeit both were newer generation (Toshiba's is SF-2281 based, Samsung is PM830). The rMBP, however, used only SSDs from Samsung, and the 256GB and 512GB SSDs in the MacBook Air were all Samsung made as well. 

Late last year it was discovered that some rMBPs might be using SSDs from SanDisk. At that time we only had system profiler screenshots and user reports to go with, which I didn't think was enough to go by (after all, the controller is the most interesting part of the story anyway). Today, I have some pictures to show:

Courtesy of MacRumors forum user Artagra

In short, that's a custom version of SanDisk's X100 mSATA SSD. The controller is Marvell's 88SS9174, which is also used in Crucial m4, Intel SSD 510, and Plextor M5S, each with custom firmware. That's coupled by eight (four on each side of the PCB) 24nm Toggle-Mode MLC NAND packages from SanDisk (SanDisk has a NAND joint-operation with Toshiba). Anand actually has an X100 in the house and just finished running tests on it a few days ago, so here's a brief comparison of the SSDs used in Macs at the moment (Corsair Force GS is the closest match to the Toshiba SSD):

Heavy Workload 2011 - Average Data Rate

Light Workload 2011 - Average Data Rate

Note that these are all retail drives; the drives Apple is using are custom and hence the performance may be slightly different (customized firmware). The X100 in the graphs is actually a newer 88SS9175 based X100 (it might be X110 as SanDisk wasn't very specific) so performance of the 9174 based might be slightly different (we shouldn't be anywhere close to U100 speeds, fortunately). The 9175 is essentially just a low-power version of the 9174 with only four channels, so I wouldn't be surprised if the 9174 based X100 was even faster. However, all the drives Apple uses are good performers. The SSD 830 is the fastest of them all but the X100 and Toshiba are trading blows as you can see above. 

I'm not surprised by Apple's move. Apple is constantly buying more and more SSDs (and flash in general) and relying on just one supplier is risky. If one manufacturer has a hiccup in production, Apple still has the channel to quickly buy SSDs from another manufacturer. There's also a possibility that the availability of Samsung PM830 is decreasing because it's now a discontinued product. Samsung told me they still have plenty of stock for OEM and B2B customers but the volume Apple needs is fairly significant and Samsung may not be able to supply that anymore. Samsung does have a newer SSD 840 (Pro) available but it's possible that Samsung's pricing made Apple choose SanDisk.

Either way, SanDisk is now the third OEM to supply SSDs to Apple. I've only seen the X100 appear in the rMBPs so far but it's certainly possible that we will see SanDisk SSDs in other Macs (such as the Air) too. While I'm sure most of the buyers would prefer the Samsung SSD (including myself), the good news is that none of the drives Apple is using are exceptionally bad. Unless your workload is very IO intensive, there shouldn't be a significant difference in real world performance (except when dealing with incompressible data and the Toshiba drive).

Thanks Paul for giving us the permission to use your picture!

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