Date: Mon, 10 Oct 2011 22:11:20 +1100 From: Mattia Rossi <mrossi@swin.edu.au> To: Matthieu Kraus <matthieu.kraus@s2008.tu-chemnitz.de> Cc: freebsd-arm@freebsd.org Subject: Re: Create FAT partition/filesystem on the internal microSD flash of the Dreamplug Message-ID: <4E92D2D8.8070500@swin.edu.au> In-Reply-To: <cone.1318239903.356917.1719.500@rlydontknow> References: <4E9290FF.7090306@swin.edu.au> <cone.1318239903.356917.1719.500@rlydontknow>
next in thread | previous in thread | raw e-mail | index | archive | help
On 10/10/11 20:45, Matthieu Kraus wrote: > Mattia Rossi writes: > >> Hi all again, >> >> I've now been on to this for quite a while, but just can't get it to >> work. >> I've mistakenly blown away the partitioning scheme that the dreamplug >> came with originally, therefore also the FAT boot partition. >> >> I've tried to recreate it using gpart and newfs_msdos, but can't >> create any new FAT partition that mount_msdosfs would mount. >> >> See: >> >> dreamplug# gpart create -s mbr da0 >> da0 created >> dreamplug# gpart add -t fat32 -i 1 -s 32M da0 >> da0s1 added >> dreamplug# newfs_msdos da0s1 >> /dev/da0s1: 65416 sectors in 8177 FAT16 clusters (4096 bytes/cluster) >> BytesPerSec=512 SecPerClust=8 ResSectors=1 FATs=2 RootDirEnts=512 >> Sectors=65520 Media=0xf0 FATsecs=32 SecPerTrack=63 Heads=255 HiddenSecs=0 >> dreamplug# mount_msdosfs /dev/da0s1 /mnt/usb >> mount_msdosfs: /dev/da0s1: Invalid argument >> >> I've tried to change the partition type to 6 and 4 and to freebsd >> (165), but didn't help. >> I also tried to set the start of the partition (-b) to 64, 128 and 192 >> but nothing there either. >> >> Trying to tune newfs_msdos to use FAT 12 or FAT 32 and different >> bytes/sec or a different mediatype (0xf8) and a variety of tweaks did >> not help either. >> >> It seems that I can't create a mountable FAT partition. >> >> I believe the problem is that gpart create -s mbr starts the >> partitioning scheme at an offset of 63 sectors, while the one on the >> external SD card I have (pre-partitioned not using FreeBSD) has an >> offset of 32 sectors. >> >> I couldn't find any documentation that tells me how to tell gpart >> create to use a different offset. >> >> Any hints? >> >> Mat > > that's another issue I ran into, however I fixed it the "dirty" way: > > for some mysterious reason mkfs_msdosfs seems to be a little broken, so > I just created the filesystem with a linux and from there on everything > worked fine (the msdosfs created under linux can be mounted without > issues using mount_msdosfs) > Oh, ok so it's not just me :-) This is either an ARM problem or a CURRENT or 9 problem, because today I flawlessly created partitions and filesystems on an other SD card (SDHC though) over a USB card reader using 8.2. I'll give it a go tomorrow with my SD card and that card reader on a CURRENT box. Meanwhile, I think I have to dd the Dreamplug Ubuntu image on to the internal microSD again, which should recreate the partitions as well. And then try not to kill the fs :-). Mat
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4E92D2D8.8070500>