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Comments: In-reply-to "Mikhail T." <mi+thun@aldan.algebra.com>
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Date: Tue, 24 Mar 2009 09:44:23 +0200
From: Danny Braniss <danny@cs.huji.ac.il>
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Cc: Daniel O'Connor <doconnor@gsoft.com.au>, freebsd-stable@freebsd.org,
	fs@freebsd.org
Subject: Re: dump | restore fails: unknown tape header type 1853384566 
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> Daniel O'Connor =CE=C1=D0=C9=D3=C1=D7(=CC=C1):
>=20
> On Tuesday 24 March 2009 11:55:07 Mikhail T. wrote:
>=20
>  =20
> >> I'm trying to migrate a filesystem from one disk to another using:
> >>
> >>     dump a0hCf 0 32 - /old =7C restore -rf -
> >>
> >> (/old is already mounted read-only). The process runs for a while an=
d> >> then stops with:
> >>
> >>     =5B...=5D
> >>       DUMP: 22.85% done, finished in 3:57 at Tue Mar 24 01:03:21 200=
9
> >>       DUMP: 24.66% done, finished in 3:50 at Tue Mar 24 01:00:58 200=
9
> >>       DUMP: 26.44% done, finished in 3:43 at Tue Mar 24 00:59:14 200=
9
> >>     unknown tape header type 1853384566> >>     abort? =5Byn=5D
> >>
> >> Any idea, what's going on? Why can't FreeBSD's restore read FreeBSD'=
s
> >> dump's output?
> >>    =20
> >>
 > What happens if you don't use the cache?
> >  =20
> No big difference:
> >     dump a0f  - /old =7C restore -rf -
>     =5B...=5D
>       DUMP: 17.25% done, finished in 3:27 at Tue Mar 24 05:42:00 2009
>       DUMP: 20.36% done, finished in 3:09 at Tue Mar 24 05:28:13 2009
>       DUMP: 23.83% done, finished in 2:50 at Tue Mar 24 05:14:32 2009
>     unknown tape header type -621260722>     abort? =5Byn=5D
>=20
> Looks like a junk value somewhere... Unitialized variable or some such.=

>=20
can you try splitting it in 2, ie no pipe?
	dump a0f some.file /old (or dump 0f - /old =7C gzip -c > file.dump.gz)
	restore rf some.file

danny