slingshot
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what could be causing data to shift ?

Sat Jul 11, 2020 2:43 pm

Got this weird issue going on where I'm imaging a couple of SAS drives using DE and the images have shifted their data by a few sectors. Obviously this is causing my array to be crud. Any ideas as to what may be the culprit ? I've done several this way with 100% success but tow of them are being a compete PITA. The source drives haven't got shifted data, so somethings happening to cause it at my end :roll: Any ideas ?

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Jared
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what could be causing data to shift ?

Mon Jul 13, 2020 3:41 pm

I've never used DE for an SAS drive, so I can't help there. I always just use ddrescue or hddsuperclone.

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lcoughey
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what could be causing data to shift ?

Mon Jul 13, 2020 11:56 pm

520 byte sectors?

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Jared
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what could be causing data to shift ?

Tue Jul 14, 2020 3:27 pm

lcoughey wrote:520 byte sectors?


That was my other thought. But I can't imagine there would be a mix of 512 and 520 in the same array.

slingshot
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what could be causing data to shift ?

Tue Aug 04, 2020 4:14 pm

Tried to isolate the cause of the shifting but to no avail. I've used different HBA, some RAID and some non-RAID, different machines, cables, dest drives etc. Seems to be luck of the draw, imaged all SAS drives in the end with no shifting but it took a few goes to get a handful perfect, weird case. Thinking I'll give the hddsuperclone method a try now, is best to have a dedicated linux box, is there a preferred Linux flavour to use ?

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Jared
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what could be causing data to shift ?

Wed Aug 05, 2020 2:02 pm

I like Parrot Linux personally. But I think it'll function the same in pretty much any Debian build.

slingshot
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what could be causing data to shift ?

Wed Aug 05, 2020 6:15 pm

Jared wrote:I like Parrot Linux personally. But I think it'll function the same in pretty much any Debian build.


Thanks Jared, I'll give it a try and see what happens ;)

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