From: Roman Mamedov <rm@romanrm.net>
To: Robert White <rwhite@pobox.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
Subject: Re: What if TRIM issued a wipe on devices that don't TRIM?
Date: Thu, 6 Dec 2018 11:26:28 +0500 [thread overview]
Message-ID: <20181206112628.77a7ea58@natsu> (raw)
In-Reply-To: <bca3c064-0df5-a18c-7196-ac12c64141bf@pobox.com>
On Thu, 6 Dec 2018 06:11:46 +0000
Robert White <rwhite@pobox.com> wrote:
> So it would be dog-slow, but it would be neat if BTRFS had a mount
> option to convert any TRIM command from above into the write of a zero,
> 0xFF, or trash block to the device below if that device doesn't support
> TRIM. Real TRIM support would override the block write.
There is such a project:
"dm-linear like target which provides discard, but replaces it with write of
random data to a discarded region. Thus, discarded data is securely deleted."
https://github.com/vt-alt/dm-secdel
--
With respect,
Roman
next prev parent reply other threads:[~2018-12-06 6:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-06 6:11 What if TRIM issued a wipe on devices that don't TRIM? Robert White
2018-12-06 6:26 ` Roman Mamedov [this message]
2018-12-06 10:04 ` ronnie sahlberg
2018-12-06 13:04 ` Austin S. Hemmelgarn
2018-12-07 4:09 ` Andrei Borzenkov
2018-12-07 12:18 ` Austin S. Hemmelgarn
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