Re: OT: silent data corruption reading from hard drives

well i think the integrity is know, but it´s not fully needed since
the security isn´t a problem we can buy secure sata/sas
controlers/disks
the main problem will be in some days when we are using SoC systems
and we only have USB to connect a harddrive... maybe when this become
more popular we will see a development of a module to have data
integrity (silient corruption detection and maybe repair)

2012/8/2  [off-list ref]:

Thanks for the replies, everyone.  I didn't expect the debate on
controller price ranges, though.  :)

My main concern was not really the price of the hardware ("OMG why
doesn't my $15 card work?!?"), but that the entire setup, hardware +
software, allows silent data corruption to occur. It's not hard to
imagine that something similar might happen with an $800 controller
card, for whatever reason.  And how would the user know, unless they
noticed bad data, or happened to look at the mismatch_cnt?

(And in my case, I think that, once the weekly raid-check runs and
updates mismatch_cnt, it's already too late, as the check process has
potentially rewritten bad data to the drives based on the bogus reads.
Is that correct?   My array is RAID-6, btw.)

Anyway, I'm going give up on SI-based controllers for now and try a
StarTech PEXSAT34, as the Marvell 88SE9128 is supported natively by
the kernel's AHCI driver.

Thanks,
matt
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-- 
Roberto Spadim
Spadim Technology / SPAEmpresarial
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