Date: Mon, 12 Aug 2013 23:19:03 +0200 From: Michael Schuh <michael.schuh@gmail.com> To: FreeBSD Stable <freebsd-stable@freebsd.org> Subject: [SOLVED] how to remove usb-storage devices without CAM errors Message-ID: <CADwRVEYtv4AT_rsHY_Oa0Wv0F7RDh4UuKoh_XXD1PvzXcV1GJw@mail.gmail.com>
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2013/8/8 Michael Schuh <michael.schuh@gmail.com> > H i@list, > > i have a simple wuestion caused by a "device loss". > > is there a special routine for unplugging usb-storage devices? > in the meaning: > may be settle some commends before unplugging the device > other than umount. > according to the handbook there ist no special routine. > unmounting should be enough and pull the USB-Devie out of the bus. > > i could not find anything related by the help of the big oracle. > > > i have some usb-sticks that i need to write with prepared disk-images by > using dd. > two or more drives are already plugged in > and da0 is already finished, da1 or da2 still at writing. > unplugging da0 causes a CAM error and interrupts the ongoing write. > i am not sure if all writes to each different device gets stopped. > this is a reproduceable behaviour thats new to me. > see the listing below. > > let me know if i can and what to do to help to further identify > and investigate this error. > > iirc this happens for the first time this way. > my last upgrade before this was feb./march. > time of svn checkout was 2013-07-22 so its may be already fixed? > > many thanks in advance > > regards > > michael > > =============== > > ugen3.2: <Verbatim> at usbus3 > umass0: <Verbatim STORE N GO, class 0/0, rev 2.10/1.10, addr 2> on usbus3 > umass0: SCSI over Bulk-Only; quirks = 0x0100 > umass0:8:0:-1: Attached to scbus8 > da0 at umass-sim0 bus 0 scbus8 target 0 lun 0 > da0: <Verbatim STORE N GO PMAP> Removable Direct Access SCSI-6 device > da0: 40.000MB/s transfers > da0: 7385MB (15124992 512 byte sectors: 255H 63S/T 941C) > da0: quirks=0x2<NO_6_BYTE> > ugen7.2: <Verbatim> at usbus7 > umass1: <Verbatim STORE N GO, class 0/0, rev 2.10/1.10, addr 2> on usbus7 > umass1: SCSI over Bulk-Only; quirks = 0x0100 > umass1:9:1:-1: Attached to scbus9 > da1 at umass-sim1 bus 1 scbus9 target 0 lun 0 > da1: <Verbatim STORE N GO PMAP> Removable Direct Access SCSI-6 device > da1: 40.000MB/s transfers > da1: 7385MB (15124992 512 byte sectors: 255H 63S/T 941C) > da1: quirks=0x2<NO_6_BYTE> > (da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 02 44 80 00 00 80 00 > ugen3.2: <Verbatim> at usbus3 (disconnected) > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > umass0: (da0:at uhub3, port 3, addr 2 (disconnected) > umass-sim0:0:0:0): Retrying command > (da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 02 44 80 00 00 80 00 > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > (da0:umass-sim0:0:0:0): Retrying command > (da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 02 44 80 00 00 80 00 > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > (da0:umass-sim0:0:0:0): Error 5, Retries exhausted > (da0:umass-sim0:0:0:0): SYNCHRONIZE CACHE(10). CDB: 35 00 00 00 00 00 00 > 00 00 00 > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > (da0:umass-sim0:0:0:0): Retrying command > (da0:umass-sim0:0:0:0): SYNCHRONIZE CACHE(10). CDB: 35 00 00 00 00 00 00 > 00 00 00 > (da0:umass-sim0:0:0:0): CAM status: CCB request completed with an error > (da0:umass-sim0:0:0:0): Error 5, Retries exhausted > (da0:umass-sim0:0:0:0): got CAM status 0x44 > (da0:umass-sim0:0:0:0): fatal error, failed to attach to device > (da0:umass-sim0:0:0:0): lost device - 0 outstanding, 5 refs > (da0:umass-sim0:0:0:0): removing device entry > > > Hi again, the error is gone after a new update from svn. many thanks. greetings m.
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