Picked up a few of these on the cheap, they work well, but my drives are only detected as slave - regardless of which part of the IDE cable I plug in the adapter. I can't find a jumper on them or a way to configure as master. Hoping for some advice from the forum.
According to what little data/product brief there is, it would appear that the JMH330 is for master, and the JMH330S is for slave.
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Interesting ! There is another model that has a Master/Slave jumper. According to datasheet pin 33 is the Master/slave select. It is pulled low internally (31Kohm internal).
My guess is that the one with the jumper pulls it high thru about a 5k-10k resistor R18 (sheet says 4mA max if I read it proper) one way and leaves open other way.
So it may be possible to decode your "slave" version and make it a "master" version.
Also see this post: SATA2PATA adapters experience
Link to datasheet: http://www.users.on.net/~fzabkar/temp/JM20330 … ec_Rev.-2.3.pdf
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