> > The xEC Identify data tells us bytes per lba ...
I find the following relevant texts in d1410r3b.pdf ATA/PI 6 2002-02-26.
Not so! Those were texts re bytes per drq. Ouch, sorry.
Texts re bytes per lba include the following.
Pat LaVarre
--- d1532v1r4.pdf ATA/PI 7 vol 1 of 3 - 2003-12-23
4.21 Long Physical Sector Feature Set for Non-Packet Devices ...
4.22 Long Logical Sector Feature Set for Non-Packet Devices ...
Devices with long logical sectors set Identify Device word 106 bit 13 to 1. The Long Logical Sector length is described by Identify Device data words 117-118.
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6.16.57 Word 106: Physical sector size / Logical Sector Size If bit 14 of word 106 is set to one and bit 15 of word 106 is cleared to zero, the contents of word 106 contain valid information. If not, information is not valid in this word. Bit 13 of word 106 shall be set to one to indicate that the device has more than one logical sector per physical sector. Bit 12 of word 106 shall be set to 1 to indicate that the device has been formatted with a logical sector size larger than 256 words. Bit 12 of word 106 shall be cleared to 0 to indicate that words 117-118 are invalid and that the logical sector size is 256 words. Bits (11:4) of word 106 are reserved. Bits (3:0) of word 106 indicate the size of the device physical sectors in power of two logical sectors. Examples: Bits (3:0): 0 = 20 = 1 logical sector per physical sector Bits (3:0): 1 = 2 1 = 2 logical sector per physical sector Bits (3:0): 2 = 22 = 4 logical sector per physical sector Bits (3:0): 3 = 23 = 8 logical sector per physical sector
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6.16.62 Words 117-118: Logical Sector Size Words 117,118 indicate the size of device logical sectors in words. The value of words 117,118 shall be equal to or greater than 256. The value in words 117,118 shall be valid when word 106 bit 12 is set to 1. All logical sectors on a device shall be 117,118 words long.
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