Date: Mon, 28 Mar 2005 22:54:19 +0400 From: Vladimir Grebenschikov <vova@fbsd.ru> To: ticso@cicely.de Cc: Julian Elischer <julian@elischer.org> Subject: Re: Reattach/redetect allways connected umass device - is it possible ? Message-ID: <1112036059.1077.2.camel@localhost> In-Reply-To: <20050328143801.GH14532@cicely12.cicely.de> References: <20050328134856.GF14532@cicely12.cicely.de> <32733.1112019870@critter.freebsd.dk> <20050328143801.GH14532@cicely12.cicely.de>
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=F7 =D0=CE, 28/03/2005 =D7 16:38 +0200, Bernd Walter =D0=C9=DB=C5=D4: > On Mon, Mar 28, 2005 at 04:24:30PM +0200, Poul-Henning Kamp wrote: > > In message <20050328134856.GF14532@cicely12.cicely.de>, Bernd Walter wr= ites: > >=20 > > >> Driver support for this is not really meaterialized and therefore > > >> the model now is that when the media is ejected the geom device > > >> is removed and a new one created right away, even if a new media > > >> is not inserted right away. > > > > > >Do you get eject notifications from any device type? > >=20 > > Right now I belive floppy disks DTRT. >=20 > Interesting. >=20 > > >One of my problems is that it is possible with SCSI MO drives to > > >eject the media, reinsert a new one and errously continue to work > > >with the old GEOM layout. > > >I already trashed the data on one media by forgetting to trigger > > >a reprobe - since then I use a mount script. > >=20 > > Well, I have no idea how to pull the information out of the CAM/SCSI > > code, but I'm sure there is _some_ way it can be done. >=20 > There is the test unit ready command. > Either it returns OK, or you may get usefull sense data. > Here is an example: Same with my memory stick: // card in card-reader # camcontrol tur -n da -u 0 -v Unit is ready // card is just removed # camcontrol tur -n da -u 0 -v Unit is not ready (pass0:umass-sim0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0=20 (pass0:umass-sim0:0:0:0): CAM Status: SCSI Status Error (pass0:umass-sim0:0:0:0): SCSI Status: Check Condition (pass0:umass-sim0:0:0:0): UNIT ATTENTION asc:28,0 (pass0:umass-sim0:0:0:0): Not ready to ready change, medium may have changed // card is just inserted # camcontrol tur -n da -u 0 -v Unit is not ready (pass0:umass-sim0:0:0:0): TEST UNIT READY. CDB: 0 0 0 0 0 0=20 (pass0:umass-sim0:0:0:0): CAM Status: SCSI Status Error (pass0:umass-sim0:0:0:0): SCSI Status: Check Condition (pass0:umass-sim0:0:0:0): UNIT ATTENTION asc:28,0 (pass0:umass-sim0:0:0:0): Not ready to ready change, medium may have changed // 1 sec later (card still here) # camcontrol tur -n da -u 0 -v Unit is ready # --=20 Vladimir B. Grebenchikov vova@fbsd.ru
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