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 Post subject: "Seagate-based" Samsung HDD connecting to termial problems
PostPosted: September 15th, 2017, 5:12 
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Joined: September 15th, 2017, 4:48
Posts: 10
Location: Ukraine, Lugansk city
Hi fellas!

My Seagate-based HDD Samsung Momentus ST1000LM024 died a terrible death the other day. I am trying to connect via Hyperterminal but all I can see in the window is just weird characters.

I tried different port speeds setings, swapping RX-TX pins. Nothing helps. Another weird thing about this bricked piece of electronics is that I can't find the ground pin on the serial port.

Any guesses?


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 Post subject: Re: "Seagate-based" Samsung HDD connecting to termial proble
PostPosted: September 15th, 2017, 8:30 
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Joined: March 19th, 2015, 15:01
Posts: 1376
Location: isreal
any unusual noise coming from the HDD ? (clicking beeping buzzing Etc.)

stiction is a very common problem with this drive

if it is then send it to a DR PRO ("not" a computer repair shop or a computer tech)


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 Post subject: Re: "Seagate-based" Samsung HDD connecting to termial proble
PostPosted: September 15th, 2017, 17:07 
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Joined: September 8th, 2009, 18:21
Posts: 10407
Location: Australia
Connect your terminal ground to any PCB ground point, eg a screw hole. Also, be aware that the LVTTL levels are 1.8V for recent HDDs. This poses a problem for 3.3V TTL adapters.

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A backup a day keeps DR away.


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 Post subject: Re: "Seagate-based" Samsung HDD connecting to termial proble
PostPosted: September 17th, 2017, 21:50 
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Joined: September 15th, 2017, 4:48
Posts: 10
Location: Ukraine, Lugansk city
jermy wrote:
any unusual noise coming from the HDD ? (clicking beeping buzzing Etc.)

stiction is a very common problem with this drive

if it is then send it to a DR PRO ("not" a computer repair shop or a computer tech)


Thanx for replying, Jermy.

I cannot help but agree with you that stiction is a very common problem with this drive. I fixed the stiction problem and managed to rescue all the data off the hard drive, however. Now, the drive won't even mount and I can't use it at all. I guess there is a whole bunch of bad sectors on the drive (scratched platter or something) and the hdd's firmware has gone crazy trying to remap them.

It is not that I want to "resurrect" this bricked drive and do understand that a once broken hdd cannot be trusted anymore to hold data. All I want is to get some practice using the UART mode on Samsung drives.


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 Post subject: Re: "Seagate-based" Samsung HDD connecting to termial proble
PostPosted: September 17th, 2017, 21:58 
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Joined: September 15th, 2017, 4:48
Posts: 10
Location: Ukraine, Lugansk city
fzabkar wrote:
Connect your terminal ground to any PCB ground point, eg a screw hole. Also, be aware that the LVTTL levels are 1.8V for recent HDDs. This poses a problem for 3.3V TTL adapters.


Thanx bro,

How do I determine at what voltage levels the TTL system of my drive operates?


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 Post subject: Re: "Seagate-based" Samsung HDD connecting to termial proble
PostPosted: September 18th, 2017, 0:24 
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Joined: September 8th, 2009, 18:21
Posts: 10407
Location: Australia
manager_lg wrote:
fzabkar wrote:
How do I determine at what voltage levels the TTL system of my drive operates?

Measure them.

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A backup a day keeps DR away.


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