On 7/24/23 14:44, Geoffrey Leach wrote:
Fedora 37, up-to-date Controller JMicron Technology Medium 1TB SanDisk ultra SD, sped transfer rate 120MB/sec DATA 155MB df /Media/SDXC says its 26% full % mount /Media/SDXC % time cp DATA /Media/SDXC real 0m0.145s user 0m0.001s sys 0m0.41s % time cp DATA /Media/SDXC real 2m44.656s user 0m0.002s sys 0m0.211s I assume that the first cp just 'fills the queue, but even assuming that I then have 310MB transferring, that's pretty slow.
The SD card may support that speed, but the reader might not. Try running "iostat 1" in another window to see what the actual speeds are.
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