Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB DDR5 Video RAM

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Why SSD runs at low speed in the optibay?

Hello!

I've installed your upgrade kit. And now there is a problem. SSD was installed in Optibay and used as the main drive for OS X. His speed read / write is only 250MB. Why such a low rate? in the information about the system shows that the drive is connected to the speed 6GB. (sata III)

MacBook Pro 15 "Unibody Mid 2012

+

256 GB Solid State Drive

Unibody Laptop Dual Drive

Thanks for your help!

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SSD read speeds are always faster than the write speed. Speeds are noted in MB/s. I think you've confused the size of the SSD with its speed - what did you use to test the read/write speed?

An issue reported by many is that the Macbook Pro seldom boots reliably from an optibay drive when selecting it as primary boot volume. Poor or bad SATA cables and the manufacture of the otpibay kit may be the reason.

By the way this is not iFixit customer service it is the volunteer help forum, so if you want to contact iFixit about a product please use the link at the bottom of the page.

If this answer is acceptable please remember to return and mark it.

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Thanks for your response! To speed test I use "Blackmagic Disk Speed ​​Test". Currently speed SSD drive in Optibay is: read 253 Mb / s ; write 250 Mb / s.

Put in place the SSD to HDD slot is not possible, there I am already using 1.5 Tb Toshiba HDD - 12.5 mm

I read that my speed problem can be corrected by replacing the firmware SSD or replacement BIOS MacBook. Is this true? Is that even possible to do?

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