Hi everyone,

I'm learning more and more about Rosewoods and similar drives with large Media Cache contents (and large MC problems). I've now worked on several drives where after making a backup of sysfile 348 and initializing the MCMT through terminal, I get full and quick data access. However, as you will know, access is not complete since I'm ignoring what's inside the Media Cache (most recent files). To fix this, I read the new 348 sysfile from the disk, and import the extents from the original one. However, when I do this, the disk again loses it's ready status when accessing certain sectors from these extents.

I speculate that the reason for this is that the actual extents list is corrupted, maybe by linking a node to a previous one and creating a loop that the drive gets stuck in. I was thinking of maybe analyzing the list but since I don't have much reversing experience, I wanted the opinion of some experts in this forum first. Also if you have a different opinion about why this happens or even some knowledge, any feedback is greatly appreciated!

Anyway, thank you everybody!

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Will recover data for food

Attatching a terminal log so maybe this post gets a little more visibility. I sanitized some of the white space.



As I see it, the LED error is related to Media Cache, however I haven't found any reference to that specific FAddr online. Google literally returns 0 results

Also just to add some more info
the drive is a Rosewood_8C,
model number ST1000LM035,
PN 1RK172,
FW SDM1

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Will recover data for food

This error means that MCMT or MC is corrupted

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SAN, NAS, RAID, Server, and HDD Data Recovery.

Hi Doomer, thank you for your reply, but did you read the original post? I already know it's media cache related. I want to know if the issue is in some part of the header that Acelab hasn't decoded yet, or if it's media damage, or if it's the actual list of extents that's corrupt. My guess is the latter, and I would like to hear if anyone has played around with trying to fix it.

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Will recover data for food

I think I already answered that didn't I?
Let me do it again - It is corrupted

I don't know if anybody did it and I personally don't see a point to do it.
This particular error is quite rare

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SAN, NAS, RAID, Server, and HDD Data Recovery.

Thank you for answering the question. I apologize for being rude.

Still, I think something could be gained from analyzing the list of extents. But if the error is rare as you say, I'll keep it on the backburner for now (like so many other things)

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Will recover data for food