[CentOS] issue_discards in lvm.conf

[James B. Byrne]

On Thu Jun 12 17:21:43 UTC 2014, John R Pierce pierce at hogranch.com wrote:

> On 6/12/2014 10:12 AM, m.roth at 5-cent.us wrote:
>> We use two methods: for the drives that are totally dead, or*sigh*  the
>> SCSI drives, they get deGaussed. For SATA that's still running, we use
>> DBAN.*Great*  software. From what I've read, one pass would probably be
>> good enough, given how data's written these days. With my name certifying
>> it, I do paranoid, and tell DBAN the full 7-pass, DoD 5220.22-M. I
>> *really*  don't think anyone's getting anything off that.
>
> if the drive has remapped tracks, there's stale data on there you can't
> erase with DBAN.
>
>> We don't have any SSDs, so I can't speak to that. Bet you could deGauss
>> them, easily enough. Or maybe stick 'em on a burner on a stove to get over
>> the Curie point....*
>
> degaussing would do nothing to flash memory, its semiconductor,
> not magnetic.

An EMP gun on the other hand. . .

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