hey I currently have same problem like you guy... after monthly headache I have find solution and work out for my hd... firstly my hard disk are WD 500gb model WD5000AACS... in 5to7 month my hardisk have symptom cannot detected after im start my computer ...sometime in use my computer hank or should I say freeze and after restart my hard disk WD500gb cannot detected.... when I tough to send my hard disk to shop(warranty) I try use back and detected but after in 5 - 10 minute it cannot detected I need my hard disk cool down before try again.... then I try my other hard disk hitaichi 80gb and have same symptom like my wd hard disk with difference that I got warning delayed write well whatever it means from window then I try to searching solution for this problem and I found the solution and apply this solution to my hitaichi and also to WD hard disk ... and what.... I can use back my hard disk Hitaichi and WD with out problem.... ohhhh god...the horror to lose 300gb worth of data..... go here for solution http://support.microsoft.com/kb/330174
first for all this solution workout for me....i dont know if workout for you guy... it just work like charm...tips
i can give to you that if your hard disk cannot detected make sure your hard disk dont make any funny sound ...well use your hand to know... secondly make sure your hard disk cool down...better dont use for 2-3 hour before attempting to try again your hard disk can detected or not.. if your hard disk can detected apply the solution on to your hard disk.. better for all your hard disk...
thridly....im not english...if you dont understand what I try to say well ....
I do have the same problem with a 500GB Sata. Was working well, then on boot its gone. Tried the disc on another PC, but the same problem. Mine is a Seagate. All my data is on this drive and backup not working.
Is there a solution?
Further to my previous post, there is a KNOWN ISSUE with Seagate 500gb and 1tb 7200.11 drives relating to the firmware. Symptoms include not being detected in BIOS after reboot (without warning) and wrong sizes being indicated in BIOS. Check the Seagate website for more information. If your drive is under warranty, as mine was, you should be able to get it repaired by Seagate (with your data intact) free of charge providing it is the Firmware issue.
SUBJECT: ST3500320AS Barracuda 7200.11 SATA 3Gb/s 500-GB Hard Drive
I come back from holiday 2 weeks ago, switched on my computer and after the BIOS posted, nothing happened. My boot drive is a Seagate Barracuda 500GB 7200.11, firmware SD15. I googled this thread and concluded that it must be a sudden firmware issue causing the “breakdown” of my hard drive (I could still hear it spin up to speed but my BIOS reported no hard disk detected. I checked the power and SATA wiring with my other hard drives and these were detected as usual).
I contacted Seagate support Tuesday, TNT came at Seagate's expense to pick up the unit Thursday. Arrived at Seagate Amsterdam service centre Friday. Received message same day saying that it was a firmware issue and they were on the case. Unit arrived back on Tuesday. Put the drive back in my PC that night and it booted into my Windows XP OS as if nothing had ever happened.
Conclusion: very disappointed and worried that drive developed this issue in the first place but first class Seagate service thereafter. I use three identical drives and have now updated the firmware for the remaining two. Hopefully this will be the last time this type of issue arises.
I also tried to put drive into an external drive enclosure as well as several different machines, changing bios settings as I went. No combination worked. The drives are shipped with a bad firmware issue that has a bug in it. This needs fixing before any machine will recognised the drive.
Options available to get the drive flashed with a non bug ridden firmware are either:-
1) Seagate ( best option if they will do it )
2) Data recovery expert ( Costly )
3) Do it yourself ( using numerours guides on internet)
I shipped the 500 Gb drive last evening per Seagate instructions.
This morning I received email that drive received.
This afternoon I receive email stating that they determined it was faulty firmware and was corrected.
Soon thereafter, I received email that they backup my data and will retain for 14 days (in case I have problems with the drive) AND that the "media" has been shipped back. I was given UPS tracking number.
Thanks for the help! I wish you success: with Seagate or with the 7200 fixit procedure in the link above.