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<div>I recently had an ugly experience with our main BlueGene Server. We changed the partiton setup on the boot disk and added a JFS filesystem. After the chage the system would not boot anymore.</div>
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<div>Instead of displaying the boot menu we got an error in the style 'could not read at offset 0x000' (I don't have the precise message handy).</div>
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<div>The IBM support line tracked the problem down to a limitation in yaboot the is can only tolerate ext2, ext3 and raiser filesystems in the primary partition table. We eventually solved the problem by creating an extended partition table for our jfs partition.
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<div>I'd like to understand better what happened there and motivate yaboot development to handle the problem better. Yaboot should either ignore filesystems it doesn't understand or at the very least display a useful error message.
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<div>Markus<br>-- <br> Markus Baertschi Phone: ++41 (21) 807 1677<br> Bas du Rossé 14b Fax : ++41 (21) 807 1678<br> CH-1163, Etoy Email: <a href="mailto:markus@markus.org">markus@markus.org
</a><br> Switzerland Homepage: <a href="http://www.markus.org">www.markus.org</a> </div>