Please help to decode FlashLED - Failure Code

[zab]

The drive is Seagate Barracuda ES.2 ST3750330NS 750GB Firmware SN03
It stars normally, no unusual noises or periodic sounds. It can't be seen in BIOS or with external USB-SATA adapter. I thought it is an infamous CC error so I have connected to the service port, and see FlashLED - Failure Code:00000047 Failure Address:00231110, SMART is ok as shown by /1 N5.

Some more interesting dumps from console:

Code:

F3 T>V4
Reassigned Sectors List
Original     New    log log   log     phy   phy
    LBA      PBA    cyl  hd  sctr zn  cyl   sctr     SFI     hours     msec
3F0AC495 3F0AD9A1  18EC3  1   526  9 18EC3   526     DC35 FFFFFFFE 6925DC68     BBM
3F0AC496 3F0AD9A2  18EC3  1   527  9 18EC3   527     DE2F FFFFFFFE 6925E380     BBM
3F0AC497 3F0AD9A3  18EC4  1     0  9 18EC4     0    2789D FFFFFFFE 6925EA70     BBM
3F0AC498 3F0AD9A4  18EC4  1     1  9 18EC4     1    27A95 FFFFFFFE 6925F166     BBM
3F0AC499 3F0AD9A5  18EC4  1     2  9 18EC4     2    27C8F FFFFFFFE 6925F85C     BBM
3F0AC49A 3F0AD9A6  18EC4  1     3  9 18EC4     3    27E89 FFFFFFFE 6925FF42     BBM
3F0AC49B 3F0AD9A7  18EC4  1     4  9 18EC4     4    28083 FFFFFFFE 69260649     BBM
3F0AC49C 3F0AD9A8  18EC4  1     5  9 18EC4     5    282D1 FFFFFFFE 69260D48     BBM
3F0AC49D 3F0AD9A9  18EC4  1     6  9 18EC4     6    284C9 FFFFFFFE 6926144F     BBM
3F0AC49E 3F0AD9AA  18EC4  1     7  9 18EC4     7    286C3 FFFFFFFE 69261B46     BBM
3F0AC49F 3F0AD9AB  18EC4  1     8  9 18EC4     8    288BD FFFFFFFE 69262255     BBM
3F0AC4A0 3F0AD9AC  18EC4  1     9  9 18EC4     9    28AB7 FFFFFFFE 69262943     BBM
3F0AC4A1 3F0AD9AD  18EC4  1     A  9 18EC4     A    28D05 FFFFFFFE 69263042     BBM
3F0AC4A2 3F0AD9AE  18EC4  1     B  9 18EC4     B    28EFD FFFFFFFE 69263751     BBM
3F0AC4A3 3F0AD9AF  18EC4  1     C  9 18EC4     C    290F7 FFFFFFFE 69263E3F     BBM
3F0AC4A4 3F0AD9B0  18EC4  1     D  9 18EC4     D    292F1 FFFFFFFE 69264546     BBM
3F0AC4A5 3F0AD9B1  18EC4  1     E  9 18EC4     E    294EB FFFFFFFE 69264C3D     BBM
3F0AC4A6 3F0AD9B2  18EC4  1     F  9 18EC4     F    29739 FFFFFFFE 69269EAF     BBM
3F0AC4A7 3F0AD9B3  18EC4  1    10  9 18EC4    10    29931 FFFFFFFE 6926A5BF     BBM

         Alt   Pending  Total    Alted  Total
       Entries Entries Entries    Alts   Alts
Head 0              0
Head 1             13
Head 2              0
Head 3              0
Head 4              0
Head 5              0
Total       0      13      13        0      0
Checksum = 1B05

F3 7>X

Head 00 Resistance 00C2
Head 01 Resistance 00D6
Head 02 Resistance 00DA
Head 03 Resistance 00B3
Head 04 Resistance 00F8
Head 05 Resistance 0106

I don't think that a few relocated sectors may cause this though. What stands for Failure Code:00000047?

[Amarbir[CDR-Labs]]

Well,
Thats Media Cache Error in a Seagate Drive

[zab]

Any suggestions how to fix it? I googled the solution which overwrite media cache with F3 A>W...,... commands. But the hard drive has no F3 C>U command, and I don't know the size of media cache area.

[Doomer]

What stands for Failure Code:00000047?

CPU stack incorrect access
Whatever code was executing at 0x231110 has caused drive's OS to crash due to stack incorrect access

As you may guess it is quite impossible to say what exactly happened with the drive w/o debugging that FW code.

[zab]

By executing F3 A>R...,... I have found that there are bad blocks in first sectors. If google is correct then the media cache is indeed unreadable. I don't know how to fix the issue though, the size of media cache is unknown to me.

[Doomer]

There is no media cache on this model

[fzabkar]

Is "media cache" associated with SmartAlign?

[zab]

Well. How to debug it then?

[zab]

I've tried to clear SMART with F3 1>N1. I don't know how to clean g-list. And don't know how would it help. The disk actually has bad sectors. I've tried to fix them with overwrite and F3 T>V4 now shows more sectors.

[Doomer]

Is "media cache" associated with SmartAlign?

No, media cache is a part of drive's storage area, several GB in size, that is hidden from user but it stores user data.

[zab]

did you use some sort of terminal command to write to the user area?

Yes. F3 A>W...,1.

@Doomer So how to debug it?

[Doomer]

@Doomer So how to debug it?

Debugging is only possible if you understand how the firmware works.
It would need to be disassembled and learned.
I don't think it's worth the time though.

[zab]

I can disassemble and learn it, that is not a big problem. Is it possible to read memory, put breakpoints etc through the F3 command interface?

[Masterclass]

I can disassemble and learn it, that is not a big problem

If it is not a problem - you may try your hand and find out what is wrong with your drive by yourself

[zab]

Disassembling is only a part of debugging process. There should be a way to read stack, registers, memory.

[Doomer]

I can disassemble and learn it, that is not a big problem. Is it possible to read memory, put breakpoints etc through the F3 command interface?

Once you disassemble the flash you will get your answers