On 28/12/2009 20:08, Alexander Motin wrote:
Author: mav
Date: Mon Dec 28 20:08:01 2009
New Revision: 201139
URL: http://svn.freebsd.org/changeset/base/201139
Log:
Add BIO_DELETE support to ada(4):
- For SSDs use TRIM feature of DATA SET MANAGEMENT command, as defined by
ACS-2 specification working draft.
- For CompactFlash use CFA ERASE command, same as ad(4) does.
A thought popped into my head as I read this.
Is anyone implementing these ATA commands, intended for CF and SSD
devices, in e.g. VirtualBox, QEMU?
They could probably help out with block allocation for copy-on-write
disk images there.
Just a thought.
cheers,
BMS
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