Date: Sat, 17 Apr 2021 16:18:21 -0400 From: Karl Denninger <karl@denninger.net> To: freebsd-stable@freebsd.org Subject: Re: geli - is it better to partition then encrypt, or vice versa ? Message-ID: <8c11dffb-3e82-a2d2-bc6a-9256bf3e8b4c@denninger.net> In-Reply-To: <c2905507-ea7b-a0ba-a167-8835f600f040@ingresso.co.uk> References: <c2905507-ea7b-a0ba-a167-8835f600f040@ingresso.co.uk>
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This is a cryptographically signed message in MIME format. --------------ms080601070700090705070706 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 4/17/2021 15:52, Pete French wrote: > So, am building a zpool on some encrypted discs - and what I have done = > is to partition the disc with GPT add a single big partition, and=20 > encrypt that. So the pool is on nda1p1.eli. > > But I could, of course, encrypt the disc first, and then partition the = > encrypted disc, or indded just put the zpool directly onto it. > > Just wondering what the general consensus is as to the best way to go=20 > here ... if there is one! :-) What do other people do ? > IMHO one reason to partition first (and the reason I do it) is to=20 prevent "drive attachment point hopping" from causing an unwelcome=20 surprise if/when there is a failure or if, for some reason, you plug a=20 drive into a different machine at some point.=C2=A0 If you partition and = label, then geli init and attach at "/dev/gpt/the-label" you now can=20 label the drive carrier with that and irrespective of the slot or=20 adapter that gets connected to on whatever machine it will be in the=20 same place.=C2=A0 If it fails this also means (assuming you labeled the=20 carrier) you know which carrier to yank and replace. Yanking the wrong=20 drive can be an unpleasant surprise. This also makes "geli groups" trivial in /etc/rc.conf for attachment at=20 boot time irrespective of whether they physically come up in the same=20 place (again typically yes, but in the case of a failure or you plug it=20 into a different adapter.....) --=20 Karl Denninger karl@denninger.net <mailto:karl@denninger.net> /The Market Ticker/ /[S/MIME encrypted email preferred]/ --------------ms080601070700090705070706 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBglghkgBZQMEAgMFADCABgkqhkiG9w0BBwEAAKCC DdgwggagMIIEiKADAgECAhMA5EiKghDOXrvfxYxjITXYDdhIMA0GCSqGSIb3DQEBCwUAMIGL MQswCQYDVQQGEwJVUzEQMA4GA1UECAwHRmxvcmlkYTESMBAGA1UEBwwJTmljZXZpbGxlMRkw FwYDVQQKDBBDdWRhIFN5c3RlbXMgTExDMRgwFgYDVQQLDA9DdWRhIFN5c3RlbXMgQ0ExITAf BgNVBAMMGEN1ZGEgU3lzdGVtcyBMTEMgMjAxNyBDQTAeFw0xNzA4MTcxNjQyMTdaFw0yNzA4 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