Vendor-specific SCSI commands reference for optical drives

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I'm looking for references of vendor-specific SCSI commands. I'm mostly concerned about the following ones :

  • 0xD4
  • 0xD5
  • 0xD8

Based on what I know already, those commands are some "special" read commands used on some Plextor drives. However, I was not able to find any more information about them anywhere.

I am aware that such knowledge is most probably protected by burn-before-you-read NDAs, but I'd still be thankful for any information regarding those - or, for that matter, any other - vendor-specific commands.

Thank you in advance.

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Roger Rowland On BEST ANSWER

Please don't treat this as an answer - I just saw your question as a challenge to my Googling skills and I claim no knowledge or understanding of SCSI protocols whatsoever.

I'm just posting the only definite hit I could find, in the hope that you may not have seen it and it might be useful. It's only concerning the 0xD8 OpCode.

So, from this page, I found this :

d8