external hard disk not getting detected

By azharali01 ·
my brother had a seagate external hard disk. and for some reasons, it was not getting detected in any of the systems. i broke the casing and fixed the disk in an external casing and it was working fine. and after some days, the casing broke and I had to travel that day and kept the disk in my laptop bag. i kept it in a plastic cover. and when i tried to get a new casing for the hard disk, its not getting detected. tried many cases, but were of no use. please help me how to get the disk working. all my works and collection of life time are in the disk.

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Well here it all depends on how IMPORTANT the data actually is

by OH Smeg Moderator In reply to external hard disk not ge ...

As the drive is not being detected you virtually have 2 options.

1 Try the drive as an Internal Drive in a computer


2 Send the drive to a Data Recovery Company who can recover data off dead drives at the Platter Level.

Of course if 1 doesn't work you are stuck with 2 as your only option and it's the most likely thing as the drive is not being detected no matter the case it is used in.

Of course here it All Depends on what happened to the drive and how the case got broken. If the drive was running and it was dropped breaking the case then most likely the Heads have made contact with the Platters and mashed up the Read Write Heads and damaged the platters and possibly could even be scratching the hell out of the platters every time it is powered up thus rendering the possibility of any Data Recovery Very Unlikely.

But if the drive was not being used at the time and it was squashed while in transit then unless something very heavy squashed it the drive should be OK, but as already said here it All Depends on what it was that broke the case the second time as to the likelihood of being able to recover anything at all and how expensive that recovery is going to be.

edited to add What type of Data Cable is in use here? If it's a Y Cable the USB Connector on the end of the cable is a Power Only Connection it has no Data Leads inside the cable so that may be your issue. If you have a Y Cable you should plug both USB Plugs into separate USB Sockets on the computer or in a Powered USB Hub.


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Too cheap to buy another drive and make a copy?

by shjacks45 In reply to external hard disk not ge ...

1. Definition of unimportant data is data you don't bother to back up.
2. Hard to give any answer with so little information provided. Its like you don't care if you get an answer or not.
3. You never tried to put it in the original case and connect it to your brothers computer. (I distinguish betwee the "case" and the interface circuitry between the drive -SATA,PATA, SASI, what - and USB.)
4. USB devices are recognized by a Vendor ID that they return upon connection. Not all operating systems recognize all the VIDs. Some external drives render two VIDs one that requires hardware driver to be installed and another Lowest Common Denominator driver providing "USB Mass Storage" support. Newer drives require 4096 byte sector support, but some computers (adapters) only provide 512 byte sector support. Original Format may be an issue. Some external USB drives are "non-removable" so format is corrupted (format recovery software may, ~10% chance, work; but you never provided the error message) unless they are unplugged while power off (e.g. WD and Seagate drives with autorun software install to install driver that recognizes alternate VID or "one touch backup".) All this handling of the bare drive could have caused static damage to the drive electronics (plastic wrap can generate static electricity). (The $$$ solution is find someone with a cleanroom, get an EXACTLY IDENTICAL DRIVE, swap platter (/electronics) of bad drive with good drive.) Many Seagate and WD external hard drives have external power supplies, because many drives use +12V and +5V in excess of the .5A +5V maximum in the USB 2.0 Standard. (Your computer may have USB ports with higher current capacity which many USB peripheral suppliers depend on. Or it may have .1A USB 1.1 ports.) ( A +5V only 2.5" or 1.8" drive typically draws .65 to .35 Amp, plus USB controller current.) As mentioned your drive may have had a Y cable to "vampire tap" current from another port (data request required for full USB standard support). Some external drives have power supplies that can accomodate higher power draw drives by controlling drive duty cycle.

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