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5.2. Resizing an Online Multipath Device
If you need to resize an online multipath device, use the following procedure.
- Resize your physical device.
- Execute the following command to find the paths to the LUN:
#
multipath -l - Resize your paths. For SCSI devices, writing a 1 to the
rescanfile for the device causes the SCSI driver to rescan, as in the following command:#
echo 1 > /sys/block/path_device/device/rescanEnsure that you run this command for each of the path devices. For example, if your path devices aresda,sdb,sde, andsdf, you would run the following commands:#
echo 1 > /sys/block/sda/device/rescan#echo 1 > /sys/block/sdb/device/rescan#echo 1 > /sys/block/sde/device/rescan#echo 1 > /sys/block/sdf/device/rescan - Resize your multipath device by executing the
multipathd resizecommand:#
multipathd resize map multipath_device - Resize the file system (assuming no LVM or DOS partitions are used):
#
resize2fs /dev/mapper/mpatha
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