dd read from an AIX LVM volume group disk errors with "Device busy" when under VCS control
Article ID: 100007431
Updated On:
Description
Error Message
With the LVM VG online on one node of the cluster, a dd read on one of the LVM VG disks was run, and the error below was observed:
# dd if=/dev/hdisk1 of=/dev/null
dd: /dev/hdisk1: Device busy
Resolution
It was proven that by varying on the LVM VG,with or without use of VCS, the dd read on the device on the alternate node fails, as expected, due to AIX reservations.
Applies To
AIX 5.3
SFHA 5.0
Issue/Introduction
The implication was that VCS was impacting a varyonvg process, or affecting the way AIX reservations were being placed on disk.
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