I have Seagate HDD model : ST3500620AS, SN: 9QM3NSQZ with curent firmware FW: DE13. The drive curently has no OS, and i dont have any important data on it. The problem is, when i try to partition, format or operate in most cases it stops working. If i "warm" reset pc the HDD no longer recognized and I need to perform "cold" boot after which it listed in bios. At all time when it's detected it reports accurate size of 500Gb. I cant apply the firmware from Seagate site co-responding to this model/SN (i'm getting error message).. Hence I'm not the first owner, I'm little confused about the firmware version because on the HDD casing it states that original Firmware is LC11 ! I Other than this SN and Model match using SeaTools utility. Tools show that Drive is Security Freeze locked and SMART has not been tripped. I have read the previous post(97 pages, and the other ones too) and cannot determine is it BSY, LBA0 or some other type of error(how can it be if firmware is DE13) ?!!? Do you have any sugestions? p.s. I found simmilarity in behavior in two previous posts, but in none of them there are no comments on problem: http://www.msfn.org/board/seagate-7200-11-...ms-t137851.html the part of bad sectors, HDD regenerator sometimes reports all sectors starting from sector 0 are bad (painfully slow), and sometimes no bad sectors are reported. And in the second one the description to problem seems very similar to mine http://www.msfn.org/board/suggestions-seag...as-t137565.html