Hello,

Did anyone managed to physically cut head(H0 in my case) from Rosewood and still managed it to calibrate? Guess there's some FW work needed to.

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odzyskiwanie danych

No butchers on this forum....

i usually only lift, the defective heads... but yeah, conceptually it works.

pepe

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Adatmentés - Data recovery

So i'm in a good place...


Thought about lifting too with a little wire or hook.
Just thinking about turning it off in FW.

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odzyskiwanie danych

If the head is just dead that works, but if the head is touching platter you'll need to lift/cut...otherwise drive dies very soon of all debries.

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Rescue IT Datarecovery service Sweden
Rescue IT Dataräddning Göteborg AB
http://www.rescue-it.se

This has recently been discussed on another forum. Several of us have experimented with SMR drives and we found that physically cutting off a head does kill the entire head stack. Maybe there is a secret we missed, but that was the general concensus.

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

I've tested cutting off. Didn't work. Guess more Rosewoods are going to be recycled soon. And I need to test lifting on a working drive.

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odzyskiwanie danych

sorry but is it worth it? i mean people are buying those?
most of the people will think paying few extra $$ and buy new hdds instead of used

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

It's not about money.... It's about the pleasure of cutting heads!

makes sense now...
Thnx for clearing this

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

recycled, not refubrished
Just trying to find a way to recover Rosewoods with one scratched surface.

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odzyskiwanie danych

send it over...

pepe

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Adatmentés - Data recovery

@melvin

Am not sure about seagate new models now,, but for WD for example it was related to zones and how big is that zone
sometimes 1MB file takes both places H0 & H1 and some times in one head only..

Now who decides where the 1MB file? .... i think its random or probably calculations takes place inside the MCU.... i don`t know

am not sure 100% about my idea here but some how right somewhere (i think)


have a good weekend

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

einstein9, When one surface is scrathed and other is good it is better to recover some files than none. If it is possible with WD, HGST or Toshiba it should be possible with Rosewood too.

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odzyskiwanie danych

Agree with you here,, but probably you did not get my point here

In Seagate H0 ok H1 scratches, when the required file is 1MB for example
sometimes the 1MB file will be in H0 ONLY and sometimes 1/2 of the file on the other head right?

so my point is about the zone size (i think) right?

sometimes we are lucky but some are not (specially when the required file SIZE is big)

correct me if am wrong here..

Thx

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

I got it. Seagate has quite big "zone size" so a lot of Jpegs and docs are recoverable. Second thing that will reduce the number of good files is fragmentation.

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odzyskiwanie danych

Thnx...

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Kuwait Data Recovery - UNIX GTC
The only reason for time is so that everything doesn't happen at once. By: Albert Einstein

I could be wrong, but I recall Rosewoods having small zones, hence 1TB models with one disk inside, most files won't be recoverable.

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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

Rosewoods read several gigs continuously from one head.

This whole thing is not related to zone sizes, coz zones are a lot wider, at least on older seagates, where the continuous areas are called serpents and usually 40-60 physical tracks wide.

pepe

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Adatmentés - Data recovery

Because they are SMR. Correct?