From: Garsha, Adam (adam.garsha@marquette.edu)
Date: Thu Apr 07 2005 - 17:01:40 EDT
Initial Question:
Has anyone ever tried to migrate a large data store from a Tru64 box to
an HPUX box by relocating (via SAN) a disk formatted to UFS?
Nail-in-the-coffin, I-wish-I-would-have-thought-of-that, answer:
I believe that byte order on HP-UX is Big Endian. The byte order on the
Alpha is Little Endian. I believe that this will pose a significant
problem. You might want to check with HP, since they will be looking to
migrate customer data from Alpha to the new version of HPUX which runs
on Itanium. HPUX on Itanium uses Big Endian byte order so that it is
compatible with the older HPUX byte order.
Your Linux experience involved a different issue, which related to disk
labeling.
The byte order was not an issue on Linux since, Intel PCs use Little
Endian byte order, just like the Alpha.
If you are familiar with the Endian term, it refers to where the bits
are counted from i.e. Big Endian starts at the opposite side from
Little Endian.
---Bob Palladino
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