If you encrypt the persistent volume, it will slow it down even more (thanks to the performance hit you'll take from the on-the-fly encryption/decryption of data.) Without persistence, data is only ever read from the USB drive, so it is blazingly fast.Īs soon as you add persistence and the OS starts writing to USB, that's when things slow down. I think the write speeds are a bit better with USB3 devices, but only when plugged into USB3 ports. But in all cases, their write speeds are much slower than their read speeds. The read/write speeds on USB devices vary wildly from device to device. The problem here is to do with USB read/write speeds.
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