Date: Tue, 18 Oct 2016 13:12:02 -0400 (EDT) From: doug@fledge.watson.org To: freebsd-questions@freebsd.org Subject: Re: Can not mount USB device Message-ID: <alpine.BSF.2.20.1610181309490.74981@fledge.watson.org> In-Reply-To: <20161019032445.K6806@sola.nimnet.asn.au> References: <mailman.91.1476792002.89621.freebsd-questions@freebsd.org> <20161019032445.K6806@sola.nimnet.asn.au>
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On Wed, 19 Oct 2016, Ian Smith wrote: > In freebsd-questions Digest, Vol 646, Issue 2, Message: 14 > On Mon, 17 Oct 2016 16:25:36 -0400 (EDT) doug <doug@fledge.watson.org> wrote: > > > The system is FreeBSD 10.3-RELEASE-p7 #0. All commands are execured as root. > > > > file -s /dev/da0s1 > > /dev/da0s1: DOS/MBR boot sector, code offset 0x58+2, OEM-ID "MSDOS5.0", > > sectors/cluster 8, reserved sectors 38, Media descriptor 0xf8, sectors/track 63, > > heads 16, hidden sectors 8192, sectors 831488 (volumes > 32 MB) , FAT (32 bit), > > sectors/FAT 813, serial number 0x482393a9, unlabeled > > > > I ended up with the following attempts > > > > mount -t msdosfs -o -m=644 /dev/da0s1 /mnt/ > > 5mount_msdosfs: /dev/da0s1: Permission denied > > > > dmesg: > > (da0:umass-sim0:0:0:0): Error 13, Unretryable error > > g_vfs_done():da0s1[WRITE(offset=19456, length=4096)]error = 13 > > (da0:umass-sim0:0:0:0): WRITE(10). CDB: 2a 00 00 00 20 26 00 00 08 00 > > (da0:umass-sim0:0:0:0): CAM status: SCSI Status Error > > (da0:umass-sim0:0:0:0): SCSI status: Check Condition > > (da0:umass-sim0:0:0:0): SCSI sense: DATA PROTECT asc:27,0 (Write protected) > > Looks like it either has a write-protect switch, as some do, or it came > write protected, ie is designed to be read-only, as apparently some are. > > > mount -t msdosfs -o -m=644,-M=644 /dev/da0s1 /mnt/ > > mount_msdosfs: /dev/da0s1: Permission denied > > > > dmesg: > > (da0:umass-sim0:0:0:0): Error 13, Unretryable error > > g_vfs_done():da0s1[WRITE(offset=19456, length=4096)]error = 13 > > > > All other variations got the same error (Permission denied) > > > > The USB stick is readable in windows 10. I thought it was a data disk it turns > > out to have 2 install program files one for windows and one for mac. > > So try mounting it read-only. As root, you don't need to mess with the > permissions either, so just this should work: > > # mount -t msdosfs -r /dev/da0s1 /mnt # alternatively '-o ro' > > cheers, Ian Bingo - thank you, I guess I should have got that out of 'man' but that ship had sailed
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