Chosen Solution
I have not seen an answer that matched my issue. Macbook 2010 refurbed by me. I have added the same ADATA 240 OR 480gig to, probably, 100 Macbook Pro units. From 2008 to 2012. I have never heard or seen an issue like this. Hopefully, one of you have. Original drive 320 Apple drive, rotational, works fine but speeds are always better in ssd. Installed Adata 240gig Started up with High Sierra boot usb Run disk utility to format to journaled,run disk First Aid to check for errors. All good. Continue to install. I have used this USB several times. It is not the USB that’s in error. Starts to build system on SSD. Normally, a 1 hour job with usb and gig speed hard wire. This build decides to take 7.5 hours. Not good. Order new drive cable, replace SSD. Same speed, same 7-9 hour build. Put rotational drive back in. All good, expected speed. I’ve gone through 2 cables, 2 drives, speed tests with BM. Something just isn’t right with this unit and ANY SSD Yes, after system installed, Trim enabled. No difference after 4 days and no apps installed. Insert road block, no clue what could be causing this? Never, ever have I experienced this type of behavior only with an SSD. It is set to startup drive. All of the suggestions I could read here, have been tried to no avail. Startup disk-yes. Trim can’t enable without system on disk, but yes. Cables tried 3. Drives-tried 2. Firmware? Connector is fine on logic or rotational would not work. It is a Sata III drive to a SATA II connection, but never experienced this problem on the other 99 I have done. Totally lost, and that’s hard to do fir me. I never give up reading and trying. Thanks for any help.
Yep! You fell into the trap! A Fixed SATA III (6.0 Gb/s) SSD won’t play well in a SATA II (3.0 Gb/s) system! You need either a Fixed SATA II (3.0 Gb/s) or a Auto Sense SATA III drive to work properly in your system. OK what is this Fixed and Auto Sense all about? Basically, When SATA III was introduced the drive makers got a lot of returned drives which popped claimed didn’t work in their systems (which was true!) At that point a few drive makers created a new series of drives which senses the systems SATA port’s I/O data rate and match it! Its similar to how your systems Ethernet speed is deduced from 10, 100 MBPS or even 1GBPS. But just like Ethernet plugging in an older fixed speed 100GB connection into a 10MBPS hub won’t work! So lets find one of these Auto Sense drives like Samsung 870 EVO if we look at this spec sheet we find the Interface line shows us: ”SATA 6 Gb/s Interface, compatible with SATA 3 Gb/s & 1.5 interfaces” So this drive is able to match to your systems slower SATA port! Now lets look at the ADATA SU650 we see the Interface line only lists SATA 6Gb/s (SATA III) which is a Fixed speed drive! So stop pulling out your hair! Find either a Fixed speed SATA II (3.0 Gb/s) drive or a drive which clearly states SATA II (3.0 Gb/s) support like the Auto Sense Samsung SSD.
