Hello. Alan wrote:
Only relevant for DMA really
So rqsize is only needed for DMA accesses?
Not really, it affects both PIO and DMA.
PIO transfers are sector at a time, or multi-sector up to a usual limit of about 16 sectors.
You're clearly mixing 2 things here. PIO transfers are 1 sectors _per interrupt_ or N (usually 16) sectors in the multiple mode. The ANSI specified transfer limit is 256 for LBA28 (which fails on some drives), and 65536 with LBA48 _per command_.
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