tiertop Posted April 6, 2023 Report Share Posted April 6, 2023 (edited) edit: unfortunately it looks like DSL might set the UDMA mode to 33. Cerbios UDMA66 also scores like 33. I have been curious about whether the older BIOSs are running UMDA33 or UMDA66. UnleashX says M8+ runs UDMA4 for example. So I thought I would load up X-DSL and run hdparm tests with M8+ flashed. With "hdparm -tT /dev/hda" I see cached reads of 440MB/s (that's RAM speed) and buffered disk reads of 28.67 MB/s. That's UDMA33. Also, hdparm -I /dev/hda reports UDMA2 which is 33. Edited April 6, 2023 by tiertop Quote Link to comment Share on other sites More sharing options...
KaosEngineer Posted April 7, 2023 Report Share Posted April 7, 2023 Linux has its own drivers to set the configuration of the Xbox's hardware. It must be (re-)setting the speed to the original value of UDMA2. Quote Link to comment Share on other sites More sharing options...
tiertop Posted April 7, 2023 Author Report Share Posted April 7, 2023 Yeah that's surely what's happening. I should look at the boot log sometime. That might be interesting. I wish I could think up some other way to bench a sequential read/write. Quote Link to comment Share on other sites More sharing options...
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