Of late, we have observed that Seagate Baracuda 7200.12 250GB hdd pcb bearing no 100535704 rev b is failing very much, while that of media is ok.

Masters, can you describe the main reasons behind the troublesome PCB, whether some capacitance is falling or any other spare.

Would like to have the diagram describing checking of the PCB.

Hope the PCB master Sir "FZABKAR" is listening.

Others are most welcome to provide link or comments on spare of the troublesome PCB.

About how many of this model have you seen with this problem?
I have not, so I am just curious.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

The killer of the pcbs is usually located between the mains plug and the motherboard, after that the final shot is given by the end user.
In a nutshell, haven't seen high failure rates on these drives neither non external cause of failure, except few MCU failures and ROM corruption - fixed in 2 mnutes - , add some other power related faults. Must be the environment.

The killer of the pcbs is usually located between the mains plug and the motherboard, after that the final shot is given by the end user.
In a nutshell, haven't seen high failure rates on these drives neither non external cause of failure, except few MCU failures and ROM corruption - fixed in 2 mnutes - , add some other power related faults. Must be the environment.

For the last 7 days i have seen 18 dead body of 250GB 7200.12

From different customers as oppose to the same person/business? And if so, is there an electric problem in that residential area?

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

I have a HDD and when I try to format using HDD LLF Tool 4.3 its says format error occured at xxx.xxx.xxx 23 and running slowly 1.7 mb/s... Please help me

Dead body, ok. And what was the reason of death ? Same or similar batch or production date ?

Yup, this is what I am trying to get at, too.
Based on the answers soon to be provided, it may indicate a high chance of a particular batch of drives distributed in that area OR just weirdness.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

I smell the sulphur...