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 Post subject: Re: Tempered HDD Or Overlay Failure [ ST500DM002 ]
PostPosted: July 31st, 2017, 1:44 
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Does this help?

http://forum.acelaboratory.com/viewtopic.php?t=8612

Quote:
Test : Edit HDD ID (ROM)
Parsing container segment....... Flash ROM image
Segment: BOOTFLOADER
Parsing segment....... BOOTFLOADER
End parsing segment... BOOTFLOADER
...
etc

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 Post subject: Re: Tempered HDD Or Overlay Failure [ ST500DM002 ]
PostPosted: July 31st, 2017, 17:11 
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I compared the official CC49 PH0G2D section (offsets 0x38 - 0x60A47) with the client's and found a block of differences in the range 0x1BBD3 - 0x1D01F.

    0x1d01f - 0x1bbd3 = 0x144C (5196)

As an experiment, I took a large text file (http://www.gutenberg.org/files/1257/old/1musk10.zip) and changed a single bit somewhere in the middle of the file. I then used WinRAR to separately compress each file. Comparing the two RARs with a hex editor showed differences in a block of approximately 0x8000 bytes in the middle of the RARs. These leads me to suspect that the client's PH0G2D section could have a difference in only a single byte, and this difference may reflect the enabling or disabling of a particular feature.

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 Post subject: Re: Tempered HDD Or Overlay Failure [ ST500DM002 ]
PostPosted: August 3rd, 2017, 14:43 
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viewtopic.php?t=35666&p=249498#p249498

Quote:
5. For 7200.12 ST3500413AS, we need to write JC49 firmware, not CC49 firmware for most 7200.12 disk.

Image

There is common fault of this disk, it can easily be in fake ready status when there is firmware problem. In this case, it is in ready status, but cannot enter terminal mode with capacity shown as 3.8GB.

As shown in figure:

Image

In this fake ready status, we can fix it by writing factory firmware JCXX.

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