Date: Sat, 1 Feb 2014 23:29:32 -0800 From: Kevin Oberman <rkoberman@gmail.com> To: "Andrey V. Elsukov" <bu7cher@yandex.ru> Cc: FreeBSD Geom ML <freebsd-geom@freebsd.org> Subject: Re: Geom tasting exfat slices Message-ID: <CAN6yY1vNhR1OCdFSVC8KdWz4CC34wKeU_%2BGB=xpN1hW=3b_yxA@mail.gmail.com> In-Reply-To: <52EDEF19.3020500@yandex.ru> References: <CAN6yY1uiKifWxwbRJ5naTxBEwcyT=z_=gDQQfeCAWp7PnUsvxw@mail.gmail.com> <52EDEF19.3020500@yandex.ru>
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On Feb 1, 2014 11:10 PM, "Andrey V. Elsukov" <bu7cher@yandex.ru> wrote: > > On 01.02.2014 23:45, Kevin Oberman wrote: > > I have a slice that is formatted (by Windows) as exfat. I can mount it with > > the mount.exfat-fuse command and ti seems to work fine using FUSE and > > fusefs-exfat. But geom does not see it. There is no /dev/geom directory > > What do you expect to see in this directory? Sorry. I meant /dev/exfat. But it does not look like GEOM groks exFAT. > > created and "gpart show" returns: > > # gpart show ada0 > > => 63 1465149105 ada0 MBR (699G) > > 63 1985 - free - (993K) > > 2048 2457600 1 ntfs (1.2G) > > 2459648 958765056 2 ntfs (457G) > > 961224704 471040000 3 ebr (225G) > > 1432264704 32878592 4 ntfs (16G) > > 1465143296 5872 - free - (2.9M) > > The exfat slice is "961224704 471040000 3 ebr (225G)" > > In more detail, I get: > > 3. Name: ada0s3 > > Mediasize: 241172480000 (225G) > > Sectorsize: 512 > > Stripesize: 4096 > > Stripeoffset: 0 > > Mode: r0w0e0 > > rawtype: 15 > > length: 241172480000 > > offset: 492147048448 > > type: ebr > > index: 3 > > end: 1432264703 > > start: 961224704 > > More oddly, when I mount the FS, I need to mount ada0s5??? > > > > Any idea what the heck is going on? I'd really like to get it to automount > > with gnome-mount, but hald does not even seem to see it at all. I may need > > to format it differently. It shows up on Windows as a "Logical" partition, > > not "Primary". I don't understand this. > > http://en.wikipedia.org/wiki/Master_boot_record > > MBR provides an ability to create 4 partitions. Windows calls them > "Primary partitions". When you want to create more, you need to use EBR. > > http://en.wikipedia.org/wiki/Extended_boot_record > > EBR uses one entry in MBR, but can provide many "Logical partitions". > They all are inside this logical partition. Historically FreeBSD has > naming convention for these partitions - those indexes start from 5. > As you can see, your MBR used all 4 primary partitions. Those indexes > are from s1 to s4. One partition contains EBR. Name of logical > partitions inside of s3 partition starts from s5. You can see all > partitions using the command `gpart show -p ada0s3`. Yes, it does, but it thinks the slice is NTFS when it is actually exFAT. Should geom recognize exFAT? 1. Name: ada0s5 Mediasize: 241171431424 (225G) Sectorsize: 512 Stripesize: 4096 Stripeoffset: 0 Mode: r1w1e0 rawtype: 7 length: 241171431424 offset: 1048576 type: ntfs index: 1 end: 471039999 start: 0 Actually, I only have 4 slices. 3 are NTFS and the other is exFAT. I have deleted the partition on Windows, but I seem to only be able to create an EBR partition, for some reason. Maybe something is still retaining a primary partition and maybe gpart can really delete it. I'd rather use GPT, but my ThinkPad won't boot from a GPT disk that is not EFT. If I can get t to be a Primary partition, perhaps GEOM will recognize it, but I'm not confident of that. Thanks so much for pointing out the obvious that I was missing. I'll play aroudn with it some more tomorrow and see what I can get it to do. > > -- > WBR, Andrey V. Elsukov
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