Date: Mon, 26 Jun 2006 11:52:50 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: John-Mark Gurney <gurney_j@resnet.uoregon.edu>, freebsd-arch@freebsd.org Subject: Re: Accessing disks via their serial numbers. Message-ID: <20060626095250.GB12511@garage.freebsd.pl> In-Reply-To: <44838.1151311394@critter.freebsd.dk> References: <20060626080038.GA12511@garage.freebsd.pl> <44838.1151311394@critter.freebsd.dk>
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--eAbsdosE1cNLO4uF Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jun 26, 2006 at 08:43:14AM +0000, Poul-Henning Kamp wrote: > In message <20060626080038.GA12511@garage.freebsd.pl>, Pawel Jakub Dawide= k writ > es: >=20 > There is a not at all subtle difference between names which relate > to the contents of the disk (as for g_label) or names which relate > to a specific physical position (as for ATA_STATIC_ID) and what you > propose where the name binds to a specific drive mechanism. >=20 > The former two allows you to do offline copy/recovery and replacement > of a disk drive, the latter does not. That's right. > >Glabel(8) currently supports labeling any GEOM provider, but it steals > >the last sector, which is not always acceptable. >=20 > When is it not acceptable ? When last sector is already occupied. > And is this the only reason why you think we need serial numbers for > names ? The main one. One of the reasons I implemented glabel(8) native labeling was a lack of something like this. I hope you don't want to see UFS labels recognition removed, because there is a different labeling mechanism? > >[...], but we need to have a general > >mechanism inside the kernel for getting such informations. >=20 > This is a very broad statement, and I don't agree (yet). I hope we don't play "convince phk@" game here. If it is not useful for you, doesn't mean it is useless in general. Let's no forget about this. And what are your arguments against such mechanism? --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --eAbsdosE1cNLO4uF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFEn65yForvXbEpPzQRAhjPAKCmtbZPk2ushYPgcHLa3yZakMxqUwCgl3H3 5XRGH5aBE8XlLLtqOMREqIM= =vHRM -----END PGP SIGNATURE----- --eAbsdosE1cNLO4uF--
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