Date: Sat, 14 Jul 2007 13:28:12 +0200 From: Ulrich Spoerlein <uspoerlein@gmail.com> To: "M. Warner Losh" <imp@bsdimp.com>, usb@FreeBSD.org, sos@FreeBSD.org Subject: Re: umass/cam headaches Message-ID: <20070714112812.GC1542@roadrunner.q.local> In-Reply-To: <20070714092838.GB1542@roadrunner.q.local> References: <20070705184309.GD2749@roadrunner.q.local> <20070705.211431.-233673940.imp@bsdimp.com> <20070706164202.GA1426@roadrunner.q.local> <20070706.164455.-1962671190.imp@bsdimp.com> <20070714092838.GB1542@roadrunner.q.local>
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I further played with lots of USB quirks and found something bizarr.
When adding the NO_INQUIRY quirk to this device, da(4) will attach
instead of cd(4), and believe it or not, geom_label and diskinfo(1)
suddenly start working:
kernel: umass0 on uhub3
kernel: umass0: SCSI over Bulk-Only; quirks = 0x0400
kernel: umass0:1:0:-1: Attached to scbus1
kernel: da0 at umass-sim0 bus 0 target 0 lun 0
kernel: da0: < > Removable Direct Access SCSI-2 device
kernel: da0: 40.000MB/s transfers
kernel: da0: 4482MB (2294912 2048 byte sectors: 255H 63S/T 142C)
kernel: GEOM_LABEL: Label for provider da0 is iso9660/DVD_VIDEO.
root@roadrunner: /data# diskinfo -v /dev/da0
/dev/da0
2048 # sectorsize
4699979776 # mediasize in bytes (4.4G)
2294912 # mediasize in sectors
142 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
I can even switch media and it's still working:
root@roadrunner: /data# diskinfo -v /dev/da0
/dev/da0
2048 # sectorsize
7403274240 # mediasize in bytes (6.9G)
3614880 # mediasize in sectors
225 # Cylinders according to firmware.
255 # Heads according to firmware.
63 # Sectors according to firmware.
Heck, even reading from the media works. Why won't cd(4) just work?
Cheers,
Ulrich Spoerlein
--
"The trouble with the dictionary is you have to know how the word is
spelled before you can look it up to see how it is spelled."
-- Will Cuppy
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