From: Thomas Bastiani <thom@codehawks.eu>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] Is erasing hard disk drive mandatory?
Date: Fri, 30 May 2014 18:57:17 +0100 [thread overview]
Message-ID: <5388C67D.1060004@codehawks.eu> (raw)
In-Reply-To: <20140530174743.GA6376@fancy-poultry.org>
On 05/30/14 18:47, Heinz Diehl wrote:
> On 30.05.2014, Thomas Bastiani wrote:
>
>> It may be that files that you create and then delete will trigger
>> a TRIM operation if dm-crypt (and
>> eventually LVM) are configured to pass TRIM through. But the rest of
>> your "securely erased" drive is still not TRIM-ed.
>
> As far as I know, mkfs discards blocks while creating the filesystem.
> So your device should be "overwritten" at that stage of the process?
>
Oh cool. I had no idea. So then it would make the whole dd operation
useless if you pass --allow-discards to cryptsetup.
--
Thomas
next prev parent reply other threads:[~2014-05-30 17:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-29 13:33 [dm-crypt] Is erasing hard disk drive mandatory? Kenny Lake
2014-05-29 20:13 ` Arno Wagner
2014-05-30 13:32 ` Stephen Cousins
2014-05-30 13:42 ` Arno Wagner
2014-05-30 13:52 ` Stephen Cousins
2014-05-30 15:07 ` Heinz Diehl
2014-05-30 15:17 ` Stephen Cousins
2014-05-30 15:58 ` Thomas Bastiani
2014-05-30 17:10 ` Heinz Diehl
2014-05-30 17:24 ` Thomas Bastiani
2014-05-30 17:47 ` Heinz Diehl
2014-05-30 17:57 ` Thomas Bastiani [this message]
2014-05-30 19:03 ` Laurence Darby
2014-05-30 19:25 ` Arno Wagner
2014-05-31 8:32 ` Heinz Diehl
2014-05-30 18:08 ` Arno Wagner
2014-05-30 10:02 ` Andrew
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5388C67D.1060004@codehawks.eu \
--to=thom@codehawks.eu \
--cc=dm-crypt@saout.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.