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Rickles

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#154532 30-Oct-2014 22:45
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A friend has brought me their laptop/2.5 inch IDE hard drive, having broken a couple of pins ... not quite sure what they were doing with it, but that's another story tongue-out

The missing pins are numbers 43 and 44, cited in diagrams as GRD and TYPE.  

I placed the drive into an external cradle, and it appears to be working fine, so what do pins 43 & 44 do?

Ground I can understand, but 44 is designated "TYPE (0 = ATA), which I assumed the drive was anyway.

R.

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MadEngineer
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  #1165388 30-Oct-2014 23:09
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0 = ata
1 = atapi

http://wiki.osdev.org/PCI_IDE_Controller

Rickles

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  #1165474 31-Oct-2014 08:43
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I had seen that, but because those pins cannot be jumpered I assume they are only 'activated' once the device is detected, viz. either a hard drive or an optical/DVD drive?

Because this device is an ATA hard drive, the broken pins will not hinder its operation?

R.

 
 
 
 


MadEngineer
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  #1165871 31-Oct-2014 13:30
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So long as it treats disconnected as a zero it should be fine. A floating level could go either way however and I have no idea what would happen when it goes high. I imagine the worst that could happen is the toggling of packet mode (see above link) and it switches over to PIO mode.

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