Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
October 12th, 2017, 17:41
I have a samsung drive I pulled from an enclosure. It is not spinning at all. My limited expertise told me to check if it has a blown tvs diode. When I check for continuity between the 5 volt and ground I do not get any. To me that means the tvs diode is good. Actually I am not sure this drive even has one. I labeled two parts "1" and "2" by the power connector, Here is what I know
-no continuity or an ohm reading of 1 when I put my meter on bother sides of part "2"
-one side of part "2" goes to ground and the other side goes to the 5 volt
-part "1" has continuity and both sides go to the 5 volt
Any help an giving me direction would be great
Does this drive have a tvs diode? If I was to guess, I would say no.
Thanks
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October 12th, 2017, 18:01
Measure Vcore and Vio.
Does the drive attempt to spin up? Can you hear any sound, however faint?
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- TVS.jpg (63.76 KiB) Viewed 10047 times
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October 12th, 2017, 18:09
no sound at all. I am embarrassed, I did not even barely notice that small tvs diode. How do I measure the vcore and vio?
I have an ohm reading of about .5ohm between vcore and 5volt and also the same with vio
October 12th, 2017, 18:21
Measure the voltages between ground and each of Vcore and Vio.
October 12th, 2017, 18:45
fzabkar wrote:Measure the voltages between ground and each of Vcore and Vio.
vcore = 2.5
vio = 1
October 12th, 2017, 18:56
Those voltages are OK.
Try to obtain a terminal log.
How to connect a terminal adaptor on a Samsung drive ?
http://www.hddoracle.com/viewtopic.php?f=116&t=189BTW, did you test the drive in a PC? Some drives are configured to power up in standby (PUIS). Also, some enclosures won't spin up a drive unless they detect a USB host.
October 12th, 2017, 18:59
I will see what I can do. Thank you so very much for all of your help.
October 13th, 2017, 11:02
I did test it on a regular pc sata cable
October 13th, 2017, 12:41
I'm betting a terminal output will show an "unpack fail" error (or something similar)
October 1st, 2018, 13:14
pcimage wrote:I'm betting a terminal output will show an "unpack fail" error (or something similar)
pcimage what does it mean when on terminal show "unpack fail"?
I have drive with this message in terminal:
- Code:
ActiveFW : 00
FWVer : 0001
SATA PLL cal done
DDR size detected = 16MB
DDR size detected = 16MB
CACHED
Unpack Fail
I have disk ST500LM012. Drive is dead, don't spin any sound. I haven't tasted this drive with another PCB yet.
October 1st, 2018, 13:54
In some Samsung drive rom fault can give the results that drive do not spin
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