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yusukeaoki

macrumors 68030
Original poster
Mar 22, 2011
2,550
6
Tokyo, Japan
Hi guys.
I installed the M4 this June and it was working flawlessly.
Until September, I had the write speed of 190mbps and 500mbps read.

As October came, my Diskspeedtest indicated my SSD getting slower and slower.
On the initial start up and test of the Blackmagic app, I get 190/500.
But as the second test goes, it gets slower and slower.
Around the 5th time, both comes to under 50mbps.

Is this a problem with my MBP, SSD, or the Blackmagic App?
I tried setting target disk mode to both my User folder and desktop but no change.
And yes I am not selecting my Optibay drive.

Here is the lowest score I got on my SSD.
 

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Nope, no TRIM and using the old 0309 OFW.

From what I've read it's easy to downgrade the firmware as long as you've got the disk, why not try upgrading to the current rev? I've got it installed on mine and I haven't had any issues. I'm also using the TRIM enabler, maybe try that first?
 
From what I've read it's easy to downgrade the firmware as long as you've got the disk, why not try upgrading to the current rev? I've got it installed on mine and I haven't had any issues. I'm also using the TRIM enabler, maybe try that first?

Ill try upgrading to the newest FW.
Does TRIM really help?
Ive heard many horrific incidents regarding the use of TRIM.
 
I haven't had any issues with either the TRIM enabler or the last two firmwares.

If I were you I'd just try to enable TRIM first. It's a simple software toggle and easy to disable.

Either way just make sure your data is backed up!
 
I haven't had any issues with either the TRIM enabler or the last two firmwares.

If I were you I'd just try to enable TRIM first. It's a simple software toggle and easy to disable.

Either way just make sure your data is backed up!

Yeah thats the problem.
All my 2TB and 4TB drives are currently full so I cant take any BU.
Did you enable TRIM as soon as you got your SSD?
If not did you see improvement?
 
Yeah thats the problem.
All my 2TB and 4TB drives are currently full so I cant take any BU.
Did you enable TRIM as soon as you got your SSD?
If not did you see improvement?

What size SSD do you have? Is it almost full? These drives are supposed to have good garbage collection, therefore there is no need for trim. The new firmware is supposed to improve garbage collection performance. I have had my drive for almost six months now without trim and the drive is as good as new.
 
What size SSD do you have? Is it almost full? These drives are supposed to have good garbage collection, therefore there is no need for trim. The new firmware is supposed to improve garbage collection performance. I have had my drive for almost six months now without trim and the drive is as good as new.

I have the 128GB model.
But storage is not a problem for me.
I have couple 2TB external HDDs, 2x LaCie 4TB RAID, and 1TB Optibay.
My M4 has 72GB of open space.
 
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