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Old 16 June 2016, 11:19   #4
Toni Wilen
WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 20,495
IDE probably is one of the slowest (at least in theory). uaehf.device or any DMA capable SCSI controller are fastest.

Using c:addbuffers to set huge (1000+) buffer size can help, especially when copying lots of tiny files. Without lots of buffers there can be lots of overlapping writes to same flash blocks. (repeating erases and writes). Windows won't cache directly accessed devices, caching is in filesystem level.
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