On 09/05/2010 04:06 PM, For Miscelenious wrote:
Check /var/log/messages for I/O errors on sdb.
If sdb1 had been the extended partition, then it overlaps both sdb5 and sdb6, so that building a PV/filesystem on sdb5 would overwrite the existing filesystem on sdb1. That would have come under the "very stupid" category. (I.e. don't try to add sdb2 as a PV! Does EL5 prevent this somehow? I don't have anything expendable attached to test on...)