First off, I want to say thanks to all of the helpful people here. As I am reading through the ATA spec, I had a few questions I was hoping on of you all mighty gurus could help with.
Refering to the attached picture and related to the Read Sectors command, am I right by saying

that
1x2 - 1x3 is the number of sectors (744)
1x4 - 1x6 is the starting sector (196832)

Or point to a specific reference regarding the offsets?
Thanks
Shawn

So as I experiment further, I am finding that x2 is the count and 3/4/5 are LBA. Sound right?

2 is length
3,4,5 and 4 bits of 6 are LBA

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SAN, NAS, RAID, Server, and HDD Data Recovery.

so x1 is specifically used for what? The words are identified as an offset from 1? where does 6 come into play? I promise this will be the last question on "this" subject. Thanks again for eveything!
Shawn

x1 is the number of sectors to read.

3,4,5,6 are the start LBA

Look at the ATA specs .. They will explain the registers in all modes, CHS, LBA and LBA48

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If you can keep your head when all about you are losing theirs, you probably don't fully understand the situation. ... Mr Kipling

https://www.mjm.co.uk/

Correction - I was ahead of myself.

1 is the Features Register.. 2 is the sector count register

_________________
If you can keep your head when all about you are losing theirs, you probably don't fully understand the situation. ... Mr Kipling

https://www.mjm.co.uk/