Resizing an Online Multipath Device
If you need to resize an online multipath device, use the following procedure:
1. Resize your physical device
2. Use the following command to find the paths to the LUN:
# multipath -l
3. Resize your paths. FOr SCSI devices, writing a 1 to the rescan file for the device causes the SCSI driver to rescan:
# echo 1 > /sys/block/device_name/device/rescan
4. Resize your multipath device by running the multipathd resize command:
# multipath -k’reisze map mpathX’
5. Resize the file system (assuming no LVM or DOS partition are used):
# resize2fs /dev/mapper/mpathX
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