mount: /dev/da0p1: Invalid argument

[Marius Strobl]

On Fri, Feb 08, 2013 at 12:30:51PM +0000, Anton Shterenlikht wrote:
> 	From kostikbel at gmail.com Fri Feb  8 12:25:21 2013
> 
> 	On Fri, Feb 08, 2013 at 12:01:41PM +0000, Anton Shterenlikht wrote:
> 	> I need to transfer some files from sparc64 -current
> 	> box onto amd64 9.1-RELEASE laptop.
> 	> The amd64 laptop has no network connection yet,
> 	> so I'm trying to achive this with a USB flash drive.=20
> 	>=20
> 	> The problem is that I always end up with
> 	>=20
> 	> # mount /dev/da0p1 /mnt/
> 	> mount: /dev/da0p1: Invalid argument
> 	> #=20
> 	>=20
> 	> If I do newfs on the sparc64 box, then I can't
> 	> mount it on the amd64 box, and vice versa.
> 	>=20
> 	> I tried just "newfs /dev/da0", and using gpart,
> 	> e.g.:
> 	>=20
> 	> # gpart show /dev/da0
> 	> =3D>     34  4029373  da0  GPT  (1.9G)
> 	>        34     2048    1  freebsd-ufs  (1.0M)
> 	>      2082  4027325       - free -  (1.9G)
> 	>=20
> 	> #
> 	>=20
> 	> and then "newfs /dev/da0p1", or similar,
> 	> but no luck.
> 	>=20
> 	> I tried sparc64 VTOC8 partition scheme too - no help.
> 	>=20
> 	> I can mount the device and use it as expected,
> 	> i.e. copy files to/from it on either box, but
> 	> the other box doesn't seem to understand the file
> 	> system.
> 	>=20
> 	> I tried loading various modules in desperation,
> 	> e.g. on the sparc64 side:
> 	>=20
> 	> # kldstat=20
> 	> Id Refs Address            Size     Name
> 	>  1    9 0xc0000000 a80e58   kernel
> 	>  2    1 0x101bca000 104000   geom_part_mbr.ko
> 	>  3    1 0x101cce000 110000   geom_label.ko
> 	>  4    1 0x101dde000 108000   geom_part_gpt.ko
> 	> #=20
> 	>=20
> 	> but still no use.=20
> 	>=20
> 	> Am I missing something simple?
> 
> 	UFS on FreeBSD is not endian-agnostic. It uses the host byte order
> 	for multibyte values.
> 
> 	As result, you can share UFS volumes only between hosts with the same
> 	endianess, like i386/amd64/ia64 little endian or sparc64/mips big endian.
> 	AFAIK, NetBSD has such support.
> 
> Wow... I didn't realise that.
> I thought UFS (1 or 2) takes all care
> of endian-ness. Do you mean that even
> I had say a SCSI internal disk with UFS2,
> I couldn't move it between a little and
> a big endian freebsd boxes?
> 
> So what is the advice for transferring data
> via USB in such cases? Any other gpart partition
> I could use?
> 

FAT should work and ZFS is also endian-agnostic. I don't know how
well these code paths of the latter are tested though and we seem
to have grown bugs in this regard at least in the area of intra-
ZFS-version compatibility (which due to lack of understanding of
the ZFS internals I'm not able to fix) since the split from (Open)
Solaris.

Marius