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MP 1,1-5,1 mac pro 5.1 / ssd systemdrive in optical or sata bay?

macha-one

macrumors newbie
Original poster
Dec 6, 2017
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Like the thread title says....what is the best option to put my system ssd in.
Optical bay or drive bay? I have a sata ssd.
I have adapters and mounts for both options so my question is solely about the speed of the ports. which should be faster?


thnx in advance for your reply
 

tsialex

macrumors G3
Jun 13, 2016
8,350
8,863
Like the thread title says....what is the best option to put my system ssd in.
Optical bay or drive bay? I have a sata ssd.
I have adapters and mounts for both options so my question is solely about the speed of the ports. which should be faster?


thnx in advance for your reply
It's exactly the same speed for all the ports, the 4 SATAII on the backplane and the two SATAII on the ODD bays, so choose what fits your usage best.
 
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macha-one

macrumors newbie
Original poster
Dec 6, 2017
28
0
It's exactly the same speed for all the ports, the 4 SATAII on the backplane and the two SATAII on the ODD bays, so choose what fits your usage best.


thnx tsialex. i reach around 250 mb/sec read write. i trim enabled my samsung evo 860 using terminal .I suppose this is a good thing to do?
is 250 the max speed over sata2?

considering the owc accelsior pci ( the cheap version) would that give me 520 mb read write ?
 
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tsialex

macrumors G3
Jun 13, 2016
8,350
8,863
thnx tsialex. i reach around 250 mb/sec read write. i trim enabled my samsung evo 860 using terminal .I suppose this is a good thing to do?
is 250 the max speed over sata2?

considering the owc accelsior pci ( the cheap version) would that give me 520 mb read write ?
SATAII = 300MB/s overhead included, so you get around 260MB/s usable after you discount overhead.

You should use TRIM with all modern SSDs.

If you don't have a SATAIII card already, forget it and look at NVMe.
 
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macha-one

macrumors newbie
Original poster
Dec 6, 2017
28
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The sata ssd takes quite a long time to boot up the system. It takes about a min before i see the apple logo. Then another minute to boot up. I checked several times with a stopwatch. Average is around 1.50 after the chime sound of booting.

I have a 4TB and 2 TB drive in my optical bays and in sata 1 the system ssd , in bay 2 the windows partition drive. Slot 3 has a 3TB and slot 4 a 2 TB drive.
Is the delay before the apple logo appears due to all the drives in my cMP?

Will the mojave/nvme route give me a faster boot time? Since i do bootcamp as well speeding up the bootprocess is my main focus.
 
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tsialex

macrumors G3
Jun 13, 2016
8,350
8,863
The sata ssd takes quite a long time to boot up the system. It takes about a min before i see the apple logo. Then another minute to boot up. I checked several times with a stopwatch. Average is around 1.50 after the chime sound of booting.

I have a 4TB and 2 TB drive in my optical bays and in sata 1 the system ssd , in bay 2 the windows partition drive. Slot 3 has a 3TB and slot 4 a 2 TB drive.
Is the delay before the apple logo appears due to all the drives in my cMP?

Will the mojave/nvme route give me a faster boot time? Since i do bootcamp as well speeding up the bootprocess is my main focus.
This is the usual POST time for a Mac Pro and won't change with Mojave. With a NVMe drive, takes even more.
 
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macha-one

macrumors newbie
Original poster
Dec 6, 2017
28
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Thnx good to know. Tsialex. I ll stick with sata for now. See what changes the coming year with GPU upgrades and ssd prices.
 
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h9826790

macrumors G5
Apr 3, 2014
14,701
7,148
Hong Kong
Is there still the glitch that a bootcamp drive must be NOT plugged in one of the ODD Sata ports ?

My Windows SSD plugged into the optical cage's quite a few years already, no problem at all.
Screenshot 2019-07-14 at 12.24.12 AM.png
 
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h9826790

macrumors G5
Apr 3, 2014
14,701
7,148
Hong Kong
Just curious, is trim not enabled because it’s a windows volume?

No, I intentionally disabled it just few days back for testing, due to possible conflict between APFS and trimforce.

When trimforce enabled, boot time 1:38

With trimforce disabled, boot time 28s

And I am still looking for prove that if APFS has build in TRIM.

So far, I can't see any slow down yet. So, I keep it disabled.

If trimforce is enabled, all SSD including Windows drive will show TRIM supported.
 
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MarkC426

macrumors 65816
May 14, 2008
1,375
434
UK
Interesting......thanks.
Personally my mac only goes in sleep mode, so rarely does a boot, so boot time is not an issue....:)
 
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h9826790

macrumors G5
Apr 3, 2014
14,701
7,148
Hong Kong
Interesting......thanks.
Personally my mac only goes in sleep mode, so rarely does a boot, so boot time is not an issue....:)

It's not the boot time annoying me. My Mac run 24/7, no sleep, shutdown about every 2 weeks for de-dusting.

But that's a sign that something is wrong. And I want to see some facts if any sign that APFS has build in TRIM (e.g. no write speed degrade without trimforce enabled for a long period of time).

Anyway, not this thread related.
 
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