----- Original Message ----- > From: "Paolo Bonzini" <pbonz...@redhat.com> > To: "Kevin O'Connor" <ke...@koconnor.net> > Cc: "Dave Frodin" <d...@camp.se-eng.com>, seabios@seabios.org > Sent: Monday, March 5, 2012 1:17:08 AM > Subject: Re: Booting from USB thumbdrives, older drives boot, newer drives > don't. > > Il 04/03/2012 19:49, Kevin O'Connor ha scritto: > >> > The sg_modes command has a "-a" option to dump out all of the > >> > supported page codes > >> > - it reports that none of the thumbdrives (tested 9) support > >> > page code = 4 > >> > - it reports that most of the thumbdrives (tested 9) support > >> > page code = 5 > >> > - it commented that page code 5 is obsolete > > Thanks Dave. I appreciate your detailed analysis. > > > > The call to cdb_mode_sense_geom() was only recently added. I'm > > inclined to just remove the call. Paolo, is there a use case where > > having the "physical" chs info is important? SeaBIOS should > > generate > > good "virtual" chs info regardless, and the underlying "physical" > > info > > is only exported in a couple of places. > > MS-DOS doesn't boot if you do not export the physical chs. I can > remove > it, but it was the best testcase I had for SCSI support. > > The simplest solution seems to be to look for page 4 support in page > 0x3f.
Except that none of the 12 devices I've tested support page 4. There's also a good chance that some of the devices could generate the stall on the page 3f request. That's what led us to thinking we should leave the page 4 query in and just add support to clear the stall. > > Paolo > > _______________________________________________ SeaBIOS mailing list SeaBIOS@seabios.org http://www.seabios.org/mailman/listinfo/seabios
