seagate not recognized

faemalje · 10-01-2009, 04:12 AM

Hi people. I have a seagate barracuda of 1000Gbs, ST31000340as, firmware: SD81. Yesterday the disk simple stopped of being recognized. It works and sounds like normal but i have tried it on two computers and no one sees it, i have used an external box connecting it by usb but it stills not being recognized. This problem occured a day that my electricity was down. What should be the problem? thanks

**raptor_pa** · 10-01-2009, 05:19 AM

When you say it sounds like normal, - can you feel it spinning? Is this drive normally an internal drive? When mounted internally, is it recognized at all in BIOS? Please post a clear closeup pic of the component side of the circuit board.

faemalje · 10-01-2009, 11:57 AM

Yes i feel it spinning. It is usually a internal drive. The bios dont recognize it anyway. The picture you want is from what part of the disk? i need to dismount it? sorry for being a dummy

**raptor_pa** · 10-01-2009, 12:56 PM

The green circuit board on the back of the drive, you may need to remove the torx head screws and remove the board to see the component side ( the one with the chips on it ) a clear closeup pic, particularly of the area behind the SATA power connector please. We'll try to see if there is any physical damage to the TVS diodes.

faemalje · 10-02-2009, 02:13 AM

Itook some pictures. I hope that they are good to see what you said.

faemalje · 10-02-2009, 02:15 AM

and this one

Dogg · 10-10-2009, 08:29 AM

I don't see any obvious issues.

**raptor_pa** · 10-10-2009, 09:06 AM

Yep it looks prtty clean, the two devices just above the power connector marked KVP 81A are the TVS diodes. Sometimes the diodes fail with obvious physical damage, but often tere is nothing that shows. You can check them with a multimeter set to diode check mode, They should be open in one direction and shorted in the other. If they are shorted in both directions when you test them, then the device has failed. You can unsolder the device fromt eh circuit board and the drive should spin up for you to recover the data. It is not safe to use the drive in this state since there is now no protection from another power surge, and another hit will get to the more sensitive components.

faemalje · 10-15-2009, 04:13 AM

Tell me something guys, if I change the circuit board with a hard drive of the same model will it work again and I ll have access to my data?

**raptor_pa** · 10-15-2009, 05:27 AM

If the drive is spinning then the chances are it won't. Even if it was the board, there is a lot more involved in a board swap than just the model number. Firmware version, date code, site code all must match, then on modern drives a whole lot of luck is involved. The firmware on a drive is written to the platters, but adaptive information, including where on the platters is written to the PCB in a rom at the time of manufacture. It takes special hardware to be able to read and transfer this adaptive information.
This sounds like possibly a firmware failure or head failure. Listen closely for a repeated ticking /swishing sound when the drive spins up. This indicates a physical failure.
Some of the 7200.11 family drives also had a bug in the firmware that caused them to 'brick' You can go to Seagate's support site and enter your drive's serial number and see if it is listed as affected by the firmware bug. If it is listed then contact Seagate support- drives bricked by this bug are being repaired by them at no charge and returned data intact.

singhvi · 11-13-2009, 04:12 AM

I have a seagate barracuda 500GB. Today the system failed to post at all. The OK beep from the system bios also didnt come. If I disconnect the drive, it posts OK. Please help.

**raptor_pa** · 11-13-2009, 05:10 AM

@singhvi - please start a new thread so we can provide individual support. Did you check the serial number on Seagate's site as in the above post? This sounds like the 7200.11 firmware issue if the drive is still spinning.

10-01-2009, 04:12 AM	#1 (permalink)
faemalje Registered User Join Date: Oct 2009 Posts: 5 OS: vista	seagate not recognized Hi people. I have a seagate barracuda of 1000Gbs, ST31000340as, firmware: SD81. Yesterday the disk simple stopped of being recognized. It works and sounds like normal but i have tried it on two computers and no one sees it, i have used an external box connecting it by usb but it stills not being recognized. This problem occured a day that my electricity was down. What should be the problem? thanks

10-01-2009, 05:19 AM	#2 (permalink)
raptor_pa Mod Hardware Team Join Date: Dec 2008 Location: Central PA Posts: 4,900 OS: XP	Re: seagate not recognized When you say it sounds like normal, - can you feel it spinning? Is this drive normally an internal drive? When mounted internally, is it recognized at all in BIOS? Please post a clear closeup pic of the component side of the circuit board. __________________

10-01-2009, 11:57 AM	#3 (permalink)
faemalje Registered User Join Date: Oct 2009 Posts: 5 OS: vista	Re: seagate not recognized Yes i feel it spinning. It is usually a internal drive. The bios dont recognize it anyway. The picture you want is from what part of the disk? i need to dismount it? sorry for being a dummy

10-01-2009, 12:56 PM	#4 (permalink)
raptor_pa Mod Hardware Team Join Date: Dec 2008 Location: Central PA Posts: 4,900 OS: XP	Re: seagate not recognized The green circuit board on the back of the drive, you may need to remove the torx head screws and remove the board to see the component side ( the one with the chips on it ) a clear closeup pic, particularly of the area behind the SATA power connector please. We'll try to see if there is any physical damage to the TVS diodes. __________________

10-10-2009, 08:29 AM	#7 (permalink)
Dogg Tech Hardware Team Join Date: Apr 2009 Location: St Louis, MO Posts: 2,084 OS: XP sp3	Re: seagate not recognized I don't see any obvious issues. __________________ Google is your friend !

10-10-2009, 09:06 AM	#8 (permalink)
raptor_pa Mod Hardware Team Join Date: Dec 2008 Location: Central PA Posts: 4,900 OS: XP	Re: seagate not recognized Yep it looks prtty clean, the two devices just above the power connector marked KVP 81A are the TVS diodes. Sometimes the diodes fail with obvious physical damage, but often tere is nothing that shows. You can check them with a multimeter set to diode check mode, They should be open in one direction and shorted in the other. If they are shorted in both directions when you test them, then the device has failed. You can unsolder the device fromt eh circuit board and the drive should spin up for you to recover the data. It is not safe to use the drive in this state since there is now no protection from another power surge, and another hit will get to the more sensitive components. __________________

10-15-2009, 04:13 AM	#9 (permalink)
faemalje Registered User Join Date: Oct 2009 Posts: 5 OS: vista	Re: seagate not recognized Tell me something guys, if I change the circuit board with a hard drive of the same model will it work again and I ll have access to my data?

10-15-2009, 05:27 AM	#10 (permalink)
raptor_pa Mod Hardware Team Join Date: Dec 2008 Location: Central PA Posts: 4,900 OS: XP	Re: seagate not recognized If the drive is spinning then the chances are it won't. Even if it was the board, there is a lot more involved in a board swap than just the model number. Firmware version, date code, site code all must match, then on modern drives a whole lot of luck is involved. The firmware on a drive is written to the platters, but adaptive information, including where on the platters is written to the PCB in a rom at the time of manufacture. It takes special hardware to be able to read and transfer this adaptive information. This sounds like possibly a firmware failure or head failure. Listen closely for a repeated ticking /swishing sound when the drive spins up. This indicates a physical failure. Some of the 7200.11 family drives also had a bug in the firmware that caused them to 'brick' You can go to Seagate's support site and enter your drive's serial number and see if it is listed as affected by the firmware bug. If it is listed then contact Seagate support- drives bricked by this bug are being repaired by them at no charge and returned data intact. __________________

11-13-2009, 04:12 AM	#11 (permalink)
singhvi Registered User Join Date: Nov 2009 Posts: 8 OS: windows vista 64	Re: seagate not recognized I have a seagate barracuda 500GB. Today the system failed to post at all. The OK beep from the system bios also didnt come. If I disconnect the drive, it posts OK. Please help.

11-13-2009, 05:10 AM	#12 (permalink)
raptor_pa Mod Hardware Team Join Date: Dec 2008 Location: Central PA Posts: 4,900 OS: XP	Re: seagate not recognized @singhvi - please start a new thread so we can provide individual support. Did you check the serial number on Seagate's site as in the above post? This sounds like the 7200.11 firmware issue if the drive is still spinning. __________________