<div dir="ltr"><div class="gmail_default" style="font-family:courier new,monospace"><br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, May 23, 2014 at 10:16 PM, Jeffrey Walton <span dir="ltr"><<a href="mailto:noloader@gmail.com" target="_blank">noloader@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi All,<br>
<br>
This is a follow up to the recent question on wiping.<br>
<br>
Previous versions of OpenStack used 'lvm_type=default' to signify a<br>
wipe. Current versions use 'volume_clear=zero' or<br>
'volume_clear=shred'.<br>
<br>
For current versions, 'zero' is a single pass and writes 0's; while<br>
'shred' uses three passes of predetermined bit patterns.<br>
<br>
When did the change occur from lvm_type to volume_clear?<br>
<br>
Thanks in advance.<br>
<br>
Jeff<br>
<br>
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</blockquote></div><div class="gmail_default" style="font-family:'courier new',monospace">Hi Jeff,</div><div class="gmail_default" style="font-family:'courier new',monospace">I think there's some confusion, lvm_type is not explicitly for setting secure delete. The default lvm_type is still thick provisioned, and further in that case the default is still to do a zero of the entire volume. None of the previous default behavior has changed.</div>
<div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace">What has changed however is that ability to specify different types of delete or none at all and that was around the Grizzly time-frame. </div>
<div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace">To reiterate, lvm_type has no direct link to the secure delete or volume_clear option. Using thin however implicitly sets volume_clear=none as it makes no sense in that context.</div>
<div class="gmail_default" style="font-family:'courier new',monospace"><br></div><div class="gmail_default" style="font-family:'courier new',monospace">Hope that helps, sorry for any confusion and feel free to hit me up on IRC if you still have questions.</div>
<br></div></div>