ST2000DM001 FW cc27 issue

[ZaphoidYK]

Hi there. I hve been running the above mentioned drive for about a year and a half, and it has stopped responding to my Linux File server, but the drive still appears to be "alive" to LVM. I am trying to connect a TTL adapter to the drive to see what diagnostics I can obtain.

I purchased a CP2102 TTL adapter from eBay:

http://www.ebay.ca/itm/130683943875?_tr ... EBIDX%3AIT

When I connect the TTL adapter to the drive, I get nothing back through PuTTY, double checked all settings, and tried both 19200 and 38400, 8N1 No F/C. When I measure ground to TX on the drive side of things, I get 1.78v back.

I have seen a few posts on needing to make a mod to get the adapter produce 1.8v, but those were all serial mods. Would I just do the same mod on my TTL adapter? 22k or so from 3.3v to TX pin, and then diode from TX pin to line to drive?..

I just want to make sure I am taking the right approach before I break out the soldering iron.

Thanks!
Richard.

[rogfanther]

Your adapter has a 5v output pin ( blue ) .Why are you connecting the 5v pin to the disk ?

You must connect only TX, Rx and GND. From your second picture, violet, dark gray and black. That is, supposing the 5V didn´t fry something in the pcb.

Also, with that adapter, it *could* work without a converter ( YMMV ). But you can search here for a converting circuit ( that based on a kindle adapter works ok ) just to be sure.

[drHDD]

It's 3.3v adapter. You need 1.8v adapter.