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imac for video editting value?

xWhiplash said:
Even a nearly full SSD with TRIM gets a little slower. That is crazy. I have never seen reports or experienced 1MB/s or lower myself due to lack of TRIM. And I have CONSTANTLY filled up my 2010 Mac Pro internal SSD without TRIM to where it only had a few MBs of free space.

I am not sure what the issue is. It might be an issue with the USB interface and the fact that it is an external drive. It sucks my SSD gets on average 230MB/s write when it is an external but 480+ MB/s write when I make it an internal drive :(
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I get 400 MB/s writes external over USB... when it's not full, or on the first write when it's near full. Same exact equipment. It's only with repeated writes on a full drive does it slow down.

And like I said, I tested this with two different USB devices and multiple computers, as well as over Firewire.

Other drives didn't behave the same way. I had one that would only do about 150-200 MB/s but it was more consistent.
 
My experience is that the 2tb and 3tb fusion drives have 128 gb ssd in them and mostly will be ok over a pure ssd drive (depends on your usage). I initially got the 1tb fusion and it was an horrible experience with only 28gb of ssd on them. I reordered my iMac with the 512 ssd and am waiting a couple of weeks for speed heaven.

I was just surprised that they would even match the hardware in the iMac with an spinning drive. I hope this is the last of the spinning drives we see. It's like taking an iPhone and putting a spinning drive in it. It wouldn't make sense (nor does it in a mac).
 
xWhiplash said:
...I do find editing in FCPX off an external SSD to be a bit sluggish compared to performing the edits on an internal drive. This is why I will be getting the 2TB internal SSD on my iMac....
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I use FCPX to edit off many different spinning drive arrays, including an 8TB SSD RAID-0 array, but I don't notice any sluggishness due to I/O -- at least in the edit phase. There are some situations with very large libraries (>4 terabytes) where small random I/Os can slow things down. Those are used to build Event Browser thumbnails and do SQL calls to obtain metadata, apparently from .plist files. However that can't be fixed by Thunderbolt vs USB, or even by a spinning array. It's a bottleneck on I/O issue & completion rate, not sequential transfer rate.

My 8TB SSD array is an OWC Thunderbay 4 Mini, and it has 4 x 2TB Samsung EVO 850s in RAID-0, and in Blackmagic does about 1170 MB/sec write, 1240 MB/sec read.

The 2017 iMac 27 2TB SSD is even faster at 1994 MB/sec write, 2395 MB/sec read.
 
joema2 said:
I use FCPX to edit off many different spinning drive arrays, including an 8TB SSD RAID-0 array, but I don't notice any sluggishness due to I/O -- at least in the edit phase. There are some situations with very large libraries (>4 terabytes) where small random I/Os can slow things down. Those are used to build Event Browser thumbnails and do SQL calls to obtain metadata, apparently from .plist files. However that can't be fixed by Thunderbolt vs USB, or even by a spinning array. It's a bottleneck on I/O issue & completion rate, not sequential transfer rate.

My 8TB SSD array is an OWC Thunderbay 4 Mini, and it has 4 x 2TB Samsung EVO 850s in RAID-0, and in Blackmagic does about 1170 MB/sec write, 1240 MB/sec read.

The 2017 iMac 27 2TB SSD is even faster at 1994 MB/sec write, 2395 MB/sec read.
Click to expand...

That is why. I am just using single SSDs through USB interface. I only get about 250MB/s on average write and 450MB/s average read. If I had thunderbolt and had an external with those speeds, that would be different. That would cost a lot more than the 2TB upgrade through :)
 
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