Date: Mon, 25 Mar 2019 10:57:37 +0000 From: erictaylor@webmarketingvendors.com To: freebsd-questions@freebsd.org Subject: Re : freebsd.org : Google Indexing Issues. Message-ID: <00000000000098ab7a0584e91225@google.com>
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[50.244.208.113]) by smtp.gmail.com with ESMTPSA id 133sm4896542itl.13.2019.03.25.04.54.21 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 25 Mar 2019 04:54:21 -0700 (PDT) Subject: Re: Unable to mount FAT16 partition (Invalid Argument) To: Polytropon <freebsd@edvax.de> Cc: freebsd-questions@freebsd.org References: <3fbf4d30-e286-fe43-3476-d2f4626b2407@gmail.com> <20190325103435.39d39bd4.freebsd@edvax.de> From: Peter Erickson <redlamb19@gmail.com> Message-ID: <49bb381b-8e90-2cd4-6cdd-7bbb51b50516@gmail.com> Date: Mon, 25 Mar 2019 06:54:20 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:60.0) Gecko/20100101 Thunderbird/60.6.0 MIME-Version: 1.0 In-Reply-To: <20190325103435.39d39bd4.freebsd@edvax.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: D35BA8EF25 X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=T0JE2L0Z; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of redlamb19@gmail.com designates 2607:f8b0:4864:20::136 as permitted sender) smtp.mailfrom=redlamb19@gmail.com X-Spamd-Result: default: False [-6.52 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; NEURAL_HAM_SHORT(-0.99)[-0.988,0]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[6.3.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(-2.52)[ip: (-7.55), ipnet: 2607:f8b0::/32(-2.86), asn: 15169(-2.14), country: US(-0.07)] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions <freebsd-questions.freebsd.org> List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions/>; List-Post: <mailto:freebsd-questions@freebsd.org> List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help> List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-questions>, <mailto:freebsd-questions-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 25 Mar 2019 11:54:24 -0000 Thanks for the response. I thought the same thing so I tried testing it. It appears that mount/mount_msdosfs has no issues mounting a FAT16 filesystem on a GPT partition. Unfortunately, I'm not sure how good of a test it is since the only way I knew to create a FAT16 partition was to use FreeBSD. # dd if=/dev/zero of=msdos_test.dd bs=1M count=300 300+0 records in 300+0 records out 314572800 bytes transferred in 0.487578 secs (645173955 bytes/sec) # mdconfig -f msdos_test.dd md0 # gpart create -s GPT md0 md0 created # gpart add -t ms-basic-data md0 md0p1 added # newfs_msdos -F 16 /dev/md0p1 newfs_msdos: trim 7 sectors to adjust to a multiple of 9 /dev/md0p1: 614112 sectors in 19191 FAT16 clusters (16384 bytes/cluster) BytesPerSec=512 SecPerClust=32 ResSectors=1 FATs=2 RootDirEnts=512 Media=0xf0 FATsecs=75 SecPerTrack=9 Heads=128 HiddenSecs=0 HugeSectors=614313 # file -s /dev/md0p1 /dev/md0p1: DOS/MBR boot sector, code offset 0x3c+2, OEM-ID "BSD4.4 ", sectors/cluster 32, root entries 512, sectors/FAT 75, sectors/track 9, heads 128, sectors 614313 (volumes > 32 MB), serial number 0xe250e15, unlabeled, FAT (16 bit) # mount -t msdosfs /dev/md0p1 /mnt # df Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/ada0s1a 28434140 6778000 19381412 26% / devfs 1 1 0 100% /dev /dev/md0p1 307088 32 307056 0% /mnt On 3/25/19 4:34 AM, Polytropon wrote: > On Sun, 24 Mar 2019 20:42:30 -0500, Peter Erickson wrote: >> # mount -t msdosfs /dev/ada1p5 /mnt >> mount_msdosfs: /dev/ada1p5: Invalid argument > > I have no idea if this applies, but I can imagine that FAT and GPT > don't work well together. GPT is "too new", and even on "Windows" > where GPT can be used, NTFS is used instead of FAT16. A FAT filesystem > is usually created on a DOS primary partition (a slice). A GPT > partition is something else... > > Sidenote: For testing, always use -o ro or -r to make sure no > writes are allowed (or tried). Sometimes this allows you to mount > even damaged file systems. Try one of these: > > # mount -t msdosfs -r /dev/ada1p5 /mnt > > # mount_msdosfs -o ro /dev/ada1p5 /mnt > > The use of "mount -t msdosfs" and "mount_msdosfs" should be equivalent. > See "man mount_msdosfs" for details. > > > >> FWIW, knoppix has no issues mounting the partition, but I'd really be >> interested in getting this to work on FreeBSD. >> >> knoppix # mount | grep /dev/sdb5 >> /dev/sdb5 on /mnt type vfat >> (rw,relatime,fmask=0022,dmask=0022,codepage=850,iocharset=utf8,shortname=mixed,errors=remount-ro) >> >> Based on the info from knoppix, I tried to mount the partition under >> FreeBSD using mount_msdosfs directly and specifying the locale >> (en_US.UTF-8) and codepage (CP850) , but the result was the same - >> "Invalid argument." > > Locale and codepage shouldn't have an effect on the basic mount > operation. Both are fairly standard and should be covered by the > defaults anyway. > > > >
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