Alignment failure on EMC SAN disk causing XFS error "warning: device is not properly aligned"
Issue
Incorrect optimal I/O value exported by EMC SAN causes various levels of the linux storage stack to mis-align partitions & data areas.
[root@host]# mkfs.xfs /dev/vg1/lv1
warning: device is not properly aligned /dev/vg1/lv1
Use -f to force usage of a misaligned device
Environment
EMC Unity 400F OS 4.0.0.7329527
EMC VNX
Red Hat Enterprise Linux
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