Re: is zeroing CRYPT needed?

2013-12-04 Thread obsd, cgi
Thanks everyone, now I understand! have a nice day! :) :) 2013/11/26 Ted Unangst t...@tedunangst.com On Tue, Nov 26, 2013 at 09:49, obsd, cgi wrote: Wouldn't it be much easier that before I create the bioctl softraid CRYPTO I would dd zero the psychical disk for the first.. dunno, 10

Re: is zeroing CRYPT needed?

2013-11-26 Thread obsd, cgi
Wouldn't it be much easier that before I create the bioctl softraid CRYPTO I would dd zero the psychical disk for the first.. dunno, 10 MBytes? 2013/11/25 Nick Holland n...@holland-consulting.net On 11/25/13 04:07, obsd, cgi wrote: according to:

Re: is zeroing CRYPT needed?

2013-11-26 Thread Luca Ferrari
On Tue, Nov 26, 2013 at 9:49 AM, obsd, cgi obsd...@postafiok.hu wrote: Wouldn't it be much easier that before I create the bioctl softraid CRYPTO I would dd zero the psychical disk for the first.. dunno, 10 MBytes? I don't see how and why it should be easier. We are talking about a single line

Re: is zeroing CRYPT needed?

2013-11-26 Thread Nick Holland
On 11/26/13 04:29, Luca Ferrari wrote: On Tue, Nov 26, 2013 at 9:49 AM, obsd, cgi obsd...@postafiok.hu wrote: Wouldn't it be much easier that before I create the bioctl softraid CRYPTO I would dd zero the psychical disk for the first.. dunno, 10 MBytes? I don't see how and why it should be

Re: is zeroing CRYPT needed?

2013-11-26 Thread Ted Unangst
On Tue, Nov 26, 2013 at 09:49, obsd, cgi wrote: Wouldn't it be much easier that before I create the bioctl softraid CRYPTO I would dd zero the psychical disk for the first.. dunno, 10 MBytes? Putting zeroes on the outside of an encrypted partition does not put zeroes on the inside of the

is zeroing CRYPT needed?

2013-11-25 Thread obsd, cgi
according to: http://www.openbsd.org/cgi-bin/man.cgi?query=bioctl dd if=/dev/zero of=/dev/rsd3c bs=1m count=1 is needed. but Why?

Re: is zeroing CRYPT needed?

2013-11-25 Thread Norman Golisz
On Mon Nov 25 2013 10:08, obsd, cgi wrote: according to: http://www.openbsd.org/cgi-bin/man.cgi?query=bioctl dd if=/dev/zero of=/dev/rsd3c bs=1m count=1 is needed. but Why? since it's likely to contain garbage. If this area has been in use before, there's a good chance it exposes random

Re: is zeroing CRYPT needed?

2013-11-25 Thread Luca Ferrari
On Mon, Nov 25, 2013 at 10:08 AM, obsd, cgi obsd...@postafiok.hu wrote: according to: http://www.openbsd.org/cgi-bin/man.cgi?query=bioctl dd if=/dev/zero of=/dev/rsd3c bs=1m count=1 is needed. but Why? Isn't already explained? the first megabyte of it should be zeroed, so tools like

Re: is zeroing CRYPT needed?

2013-11-25 Thread Nick Holland
On 11/25/13 04:07, obsd, cgi wrote: according to: http://www.openbsd.org/cgi-bin/man.cgi?query=bioctl dd if=/dev/zero of=/dev/rsd3c bs=1m count=1 is needed. but Why? I've actually found it more useful to zero the raw RAID partition than the assembled softraid disk. This takes care of