Sure, I made several tests on my own machine as well as implemented such stuff for our projects.
I performed a quick test on my own machine for you by copying files in the console and access the destination device in parallel with DOpus (only in the first run). You can easily perform these tests on your own machine by using the Power-Shell. I have repeated each test 20 times and dumped the fastest run.
MANY SMALL FILES TEST (BUFFERED + UNBUFFERED)
Source:
D:\Prj\ (contains 12.840 files, total-size of 987 MB)
2x Intel SSD (intern / RAID-0)
Target:
T:\Test
1x WD HDD (intern)
PS D:> Measure-Command {xcopy.exe D:\Prj*.* T:\Test\ /e}
BUFFERED: System lags a little and Perfmon shows caches growing. DOpus lags heavily, browsing the destination in parallel is only possible with short freezes (2-3 seconds).
Days : 0
Hours : 0
Minutes : 0
Seconds : 16
Milliseconds : 485
Ticks : 164852579
TotalDays : 0,000190801596064815
TotalHours : 0,00457923830555556
TotalMinutes : 0,274754298333333
TotalSeconds : 16,4852579
TotalMilliseconds : 16485,2579
PS D:> Measure-Command {xcopy.exe D:\Prj*.* T:\Test\ /e /j}
UNBUFFERED: System runs smooth and Perform shows constant caches. DOpus lags a little bit but browsing the destination in parallel is possible (near instant).
Days : 0
Hours : 0
Minutes : 3
Seconds : 28
Milliseconds : 757
Ticks : 2087572198
TotalDays : 0,00241617152546296
TotalHours : 0,0579881166111111
TotalMinutes : 3,47928699666667
TotalSeconds : 208,7572198
TotalMilliseconds : 208757,2198
SINGLE LARGE FILE TEST (BUFFERED + UNBUFFERED)
Source:
D:\Backup\System-0.tib (single file; 5.2 GB)
2x Intel SSD (intern / RAID-0)
Target:
T:\Test
1x WD HDD (intern)
PS D:> Measure-Command {xcopy.exe D:\Backup\System-0.tib T:\Test\ /e}
BUFFERED: System lags a little and Perfmon shows caches growing. DOpus lags heavily, browsing the destination in parallel is only possible with long freezes (10-20 seconds).
Days : 0
Hours : 0
Minutes : 1
Seconds : 8
Milliseconds : 830
Ticks : 688309249
TotalDays : 0,00079665422337963
TotalHours : 0,0191197013611111
TotalMinutes : 1,14718208166667
TotalSeconds : 68,8309249
TotalMilliseconds : 68830,9249
PS D:> Measure-Command {xcopy.exe D:\Backup\System-0.tib T:\Test\ /e /j}
UNBUFFERED: System runs smooth and Perform shows constant caches. DOpus lags a little bit but browsing the destination in parallel is possible (near instant).
Days : 0
Hours : 0
Minutes : 1
Seconds : 10
Milliseconds : 9
Ticks : 700095699
TotalDays : 0,000810295947916667
TotalHours : 0,01944710275
TotalMinutes : 1,166826165
TotalSeconds : 70,0095699
TotalMilliseconds : 70009,5699