vbl117 wrote:Sorry but cfitz hypothesis is wrong .
I ve bought a LTD-166S one week ago .
It was manufactured in August 2002 and s/n is 102235006221 ( lower than cfitz serial number although is drive has been manufactured later ) .
Not that my feelings would be hurt if my hypothesis was wrong, but, vbl117, your data does not invalidate my hypothesis. I merely suggested that since my 166S was made in September 2002 with S/N 225236009500, any drives made later than that with higher serial numbers ought to be 166S models also. I didn't say anything about drives made earlier with lower serial numbers. I'm not so self-centered to believe that 166S drives did not exist before I bought mine...
Maybe this restatement of my hypothesis would help you understand better what I was saying:
September 2002 with S/N 225236009500 or later = 166S
September 2002 with S/N 225236009499 or earlier = unknown
Of course, now that you have reported an August 2002 drive with S/N 102235006221, we could perhaps extend the hypothetical 165H to 166S transistion even earlier and say any drive made in August 2002 with S/N 102235006221 or later is a 166S. However, since I don't think LiteOn has made 123,001,003,279 DVD-ROM drives between August and September, we can probably conclude the serial numbers are not simple linear progressions, and the most significant digits probably indicate things like the plant of manufacture, etc.
So how about this for the latest version of the hypothesis, subject to revision if more data arrives:
drives with 102235... series serial numbers:
August 2002 with S/N 102235006221 or later = 166S
August 2002 with S/N 102235006220 or earlier = unknown
drives with 225236... series serial numbers:
September 2002 with S/N 225236009500 or later = 166S
September 2002 with S/N 225236009499 or earlier = unknown
If you want to disprove the hypothesis (and please do so if you can - it would help anyone trying to ensure that they get a 166S), you need to produce a
165H drive with a 102235 series serial number that was made August 2002 or later with S/N 102235006222 or higher, or you need to produce a
165H with a 225236 series serial number that was made September 2002 or later with S/N 225236009501 or higher.
cfitz