[CentOS] issue_discards in lvm.conf

[m.roth at 5-cent.us]

James B. Byrne wrote:
> 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. . .

I could try out my new welding rig....

      mark