Date: Sat, 28 Nov 2009 17:28:51 +0100 From: =?ISO-8859-1?Q?Marius_N=FCnnerich?= <marius@nuenneri.ch> To: "James R. Van Artsdalen" <freebsd-geom@jrv.org> Cc: freebsd-geom@freebsd.org Subject: Re: help adding device serial numbers to /dev namespace? Message-ID: <b649e5e0911280828s4f5607cfq4283b314ed4fbce8@mail.gmail.com> In-Reply-To: <4B106C51.7070905@jrv.org> References: <4B106C51.7070905@jrv.org>
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On Sat, Nov 28, 2009 at 01:18, James R. Van Artsdalen <freebsd-geom@jrv.org> wrote: > Can anyone give me suggestions on how to implement putting disk driver > serial numbers in the /dev namespace, much as UFS ID's are put there now? > > I want to propose adding the disk drive's hardware serial number, i.e., > for this > > # camcontrol identify ada0 > pass0: <ST3750640AS 3.AAJ> ATA/ATAPI-7 SATA 1.x device > pass0: 150.000MB/s transfers > > protocol =A0 =A0 =A0 =A0 =A0 =A0 =A0ATA/ATAPI-7 SATA 1.x > device model =A0 =A0 =A0 =A0 =A0ST3750640AS > firmware revision =A0 =A0 3.AAJ > serial number =A0 =A0 =A0 =A0 3QD0NWQT > ... > > I would add a name like /dev/serialnum/3QD0NWQT. =A0This differs from the > current name schemes I know of in that it describes the whole disk and > not any particular partition or region, and no on-disk storage is needed. > > I think this needs to be done in GEOM, as a result of disk_create() and > using d_ident, but I'm getting lost and need some guidance to do an > example patch to "formally" propose the idea. > > The immediate use today is for ZFS. If I remember correctly ivoras@ already proposed a patch like this.
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