macbook 17 early'11, ssd in optibay has 22mb/s write speed?!

[temen]

Hi,
Please help?

let me start with - disk is fine, I used it before as a main drive (in hdd slot), with different osx system and it had 200-350mb/s write and read.
After year of laying I decided to fix my setup. Bought optibay (tray for hdd/ssd in superdrive place) where I installed this ssd (samsung pro 840),
and in my hdd slot I have some 1TB 5400 speed hdd.

installed el capitan on ssd (both drives encrypted) and right after that installed & opened blackmagic disk speed test. Results are:
1. hdd write 84mb/s, read 105mb/s
2. ssd: write was about 30mb/s, once even started from 80mb/s, but average is ~22mb/s, sometimes it gets even as low as 12mb/s. read - 180mb/s

about this mac->more information->sata section shows that hdd controller has Link speed 6 Gigabit, while ssd controller has 3 Gigabit.

What can I do here? Trim enabler on El Capitan is still way to go, or is it obsolete since OSX Lion?
Maybe my optical bay is broken somehow?

I hope I can expect and get my ssd in superdrive tray to at least 200mb/s?

 

[Gjwilly]

The optibay is slower. Nothing you can do.

 

[DeltaMac]

You could swap the HDD and the SSD, so you have the SSD in the normal hard drive position. That will give you the faster drive on the faster bus.

 

[temen]

Dah. I just now noticed that "Trim support: No", typed "sudo trimforce enable" and now my write is ~2200mb/s, read 268mb/s.
I'm assuming that's limit of 3gbit sata?

DeltaMac, putting ssd in hdd will not cause any problems? with some motion sensor in hdd bay or something like that?
[doublepost=1469676648][/doublepost]In previous post by 2200mb/s I meant of course 220

My write was jumping a while, it was 40, 100, 150, 250, then slowed down again to 70mb/s. But now for ~20 test cycles it stabilized at 250mb/s write, 250mb/s read

 

[Prabas]

I had setup like that on my MBP 13 Late 2011. SSD in original HDD slot and the old HDD in optical drive bay. I've had it for a year or two, no issues whatsoever.

 

[tubeexperience]

SSD goes into the main bay (HDD slot), not the optical bay.

SATA 3.0 6Gb/s in the Optical Bay?
All of the 13-, 15-, and 17-inch 2011 MacBook Pros we purchased right at release shipped with SATA 3.0 6Gb/s connectivity in the main drive bay and SATA 2.0 3Gb/s connectivity in the optical bay. (Note: For the remainder of this piece – I will refer to the two connections as 6Gb/s and 3Gb/s)

Units we’ve purchased over the past month indicate that Apple seems to be changing over to having 6Gb/s connectivity in both the main drive bay and in the optical bay. That’s good news. I say “seems to,” as we’ve received multiple units with the ‘dual 6Gb/s’ setup, but after getting 17″ MacBook Pros with the dual 6Gb/s setup in multiple deliveries this month, the 17” we received earlier in this week was back to 6Gb/s in the main bay and 3Gb/s in the optical.

Bottom line, it is not a spec Apple includes (what SATA connection will be in each bay) and currently is no correlation we have found to explain why a new unit this week was different than the units received over the past couple. There is no guarantee of a new unit purchased having the 6Gb/s in the optical bay – but I can say that the odds seem fairly favorable based on units we’ve been getting and reports in the field. Also, this is only really important to you if you hope to use a 6Gb/s drive in your optical bay as enabled with our Data Doubler.

 

[DeltaMac]

One issue to consider: a spinning hard drive in the optical drive bay will not have the protection of the sudden motion sensor (SMS).
But, your primary boot drive would be the SSD - which would "ignore" the motion sensor anyway, and the protection provided by the SMS would likely not be that important for you with a spinning hard drive that is basically for data.
And, that might be incentive for you to be more diligent in keeping a current backup of that hard drive.

 

[temen]

And, that might be incentive for you to be more diligent in keeping a current backup of that hard drive.

I'm. And I'm also looking right now for spec to build NAS with 3-5 drivers and raid 10, so I should be good in the matter of backup.

Thanks!