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magnusja
Why does mass storage send a 16k data packet into multiple data packets?
Problem
private fun transferOneCommand(command: CommandBlockWrapper, inBuffer: ByteBuffer): Int
I have a 16k data packet. Why is it divided into 5 reads? Can I read 16k data packets at once? Instead of subcontracting to read
Expected behavior
Actual behavior
Stacktrace of Excpetion
(if exists)
Code where problem occurs
Depends on the flash drive. Oftentimes, some support larger ones, some do not.
But anyways, the ScsiWrite and Read commands currently only support some smaller chunk sizes.
See here, https://github.com/magnusja/libaums/blob/develop/libaum
s/src/main/java/me/jahnen/libaums/core/driver/scsi/commands/ScsiRead10.kt
Currently, there is a read command 32, which probably speeds up transfer by a lot if usb drive supports it. See here: https://www.seagate.com/files/staticfiles/support/docs/manual/Interface%20manuals/100293068j.pdf
I am happy to take a PR. But as the USB spec is complex, it is hard to support each of these flawlessly.
@magnusja Thank you. I am very happy to see your reply. The problem has been solved. Thank you very much.