Re: Ultrix and SunOS FFS compatibility?

[mlelstv%serpens.de@localhost (Michael van Elst)]

cmhanson%eschatologist.net@localhost (Chris Hanson) writes:

>Should FFS on NetBSD be automatically compatible with FFS on Ultrix and =
>SunOS?

The various FFS flavours are not compatible. Partially because details
have deviated, partially because validation routines don't handle
legacy defaults or previosly undefined values.


>I tried to mount an ISO yesterday with a raw Ultrix filesystem, but the =
>mount failed due to a bad or unknown superblock. (I haven=E2=80=99t =
>tried a filesystem from SunOS yet.) However, Linux was able to mount it =
>just fine.

For read-only access some compatibility might be possible and useful,
but in most cases you also have to consider differences in partitioning
and volume management.

For write access, you'd need to track all the flavours to avoid
data corruption.