Electronics > Projects, Designs, and Technical Stuff

Harddrives - nice pictures

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Noopy:
And again a new HDD!
See the details of a Seagate ST-177I:

https://www.richis-lab.de/HDD_Seagate_ST-177I.htm


Everything a little bit bigger:




Of course with die Pictures:



 ;D


Have fun!  :popcorn:

Noopy:

--- Quote from: Noopy on September 20, 2019, 08:23:55 pm ---Till now I had two WD Red 3TB with bad SMART values.

The boards in both hard disks seem to have a corrosion problem:



In my opinion they use galvanic silver. Cheap and good with BGA but problematic regarding corrosion.
Very bad when you want ot use spring contacts for very fast signals:



I would have chosen gold!  8)

--- End quote ---


Do you remember the WD Red silver tarnish thing?

After a lot of time and a query WD gave me the following answer:

"Thank you for waiting for our reply. Our engineers have studied your reports and inform us thus.
We would like to apologize for any trouble this has caused you. After review the surface of the PCB shows silver tarnish which is not a functional or reliability issue. This is expected as the surface finish is silver. ..."

With a little help of Google you find a lot of information regarding the rising resistance of silver tarnish.
I can´t imaging that shouldn´t be an issue.  :o

We will see whether I will get a better answer the next days... ...weeks...

Prehistoricman:

--- Quote from: Noopy on January 04, 2020, 10:46:50 pm ---Do you remember the WD Red silver tarnish thing?

After a lot of time and a query WD gave me the following answer:

"Thank you for waiting for our reply. Our engineers have studied your reports and inform us thus.
We would like to apologize for any trouble this has caused you. After review the surface of the PCB shows silver tarnish which is not a functional or reliability issue. This is expected as the surface finish is silver. ..."

With a little help of Google you find a lot of information regarding the rising resistance of silver tarnish.
I can´t imaging that shouldn´t be an issue.  :o

We will see whether I will get a better answer the next days... ...weeks...

--- End quote ---

I've seen quite a few HDD PCBs with this look. I think one had issues before I gave the contacts a good scrubbing.

Amazing pics. I love the look of the platter on that old Seagate.

station240:
I have that silver finish on 4 WD green hard drives, after one completely died, I had to clean all the other drives PCBs.

Failure mode is this:
1. Controller gets bad/weak signals from the heads, assumes it's just a bad sector.
2. Controller moves the data to another part of the drive, and marks the original sector as bad.
3. Error rates get worse, controller moves more files, marks more sectors as bad.
4. After days/weeks of this, whenever the computer is on the drive has activity.
5. Actual disk surface has damage from constant moving of files.
6. Drive has more bad sector than it can mark.
7. Attempt to reformat drive as last resort after saving data.
8. Reports over 10,000 unrecoverable bad sectors, marks them as bad then crashes.
9. Reboot shows drive as totally unavailable, to the BIOS!
10. Totally bricked.

Noopy:

--- Quote from: Prehistoricman on January 04, 2020, 11:20:35 pm ---I've seen quite a few HDD PCBs with this look. I think one had issues before I gave the contacts a good scrubbing.

--- End quote ---

"Unfortunately" I had to disassemble the HDD before I tried to clean the contacts.  ;D I have four of them left all around five years old. If they ever give bad SMART-values I´ll try some cleaning first.



--- Quote from: Prehistoricman on January 04, 2020, 11:20:35 pm ---Amazing pics. I love the look of the platter on that old Seagate.

--- End quote ---

Thanks! Good feedback is always a reason to do more pictures.  :popcorn:



--- Quote from: station240 on January 04, 2020, 11:29:02 pm ---I have that silver finish on 4 WD green hard drives, after one completely died, I had to clean all the other drives PCBs.

Failure mode is this:
1. Controller gets bad/weak signals from the heads, assumes it's just a bad sector.
2. Controller moves the data to another part of the drive, and marks the original sector as bad.
3. Error rates get worse, controller moves more files, marks more sectors as bad.
4. After days/weeks of this, whenever the computer is on the drive has activity.
5. Actual disk surface has damage from constant moving of files.
6. Drive has more bad sector than it can mark.
7. Attempt to reformat drive as last resort after saving data.
8. Reports over 10,000 unrecoverable bad sectors, marks them as bad then crashes.
9. Reboot shows drive as totally unavailable, to the BIOS!
10. Totally bricked.

--- End quote ---

Sounds absolutely reasonable.

I´m curious wheter I´ll get a better answer from WD than the last one. :palm:
But ok, what should they write? "Hey, we screwed up. Sorry!"  :-//
They design such technical wonderful things and than they mess with the PCB-finish...  |O

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