Have you tried using cpio in passthrough mode? I've used CPIO on big systems before with success, although admittedly not on OpenBSD ..

Matthias Bertschy wrote:
OpenBSD 3.7 - i386
Pentium 4 3GHz - 1GB RAM - 2GB swap

Hello list,

For the past 3 weeks, I have been working on a difficult problem: moving a backuppc (http://backuppc.sourceforge.net/) pool from a RAID0 to a big disk, in order to free the RAID0 before rebuilding a RAID5.

The RAID0 has one partition, its size is 2112984700 blocks (512-blocks), roughly 1008GB, which is close to the maximum allowed by ffs. The big disk is 300GB.

I need to move 96GB of data which are, due to backuppc design, full of hardlinks!

So far, I have tried to use:
1) dd: impossible because the partitions cannot be the same size (and the RAID5 won't be the same size as the RAID0) 2) pax -rw: after transferring almost 70GB, it bails out with a "Segmentation fault" 3) tar to archive: after something like 60GB, it complains with some "file name too long" errors 4) gtar to archive (from package gtar-1.15.1p0-static.tgz): ends up with a "gtar: memory exhauted" error
   5) dump to file: successful but
5') restore from file: stops even before starting due to a "no memory for entry table" error (there is still a lot of unused memory and swap - and no ulimit)

Any help is appreciated because I really don't know what to do next.

Matthias Bertschy
Echo Technologies SA

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