第 6 章 Managing multipathed volumes

Procedure

1. Resize your physical device.

2. Find the paths to the logical unit number (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, as in the following command:

   # echo 1 > /sys/block/path_device/device/rescan

   Ensure that you run this command for each of the path devices. For example, if your path devices are sda, sdb, sde, and sdf, 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

4. Resize your multipath device:

   # multipathd resize map multipath_device

5. Resize the file system, assuming no LVM or DOS partitions are used:

   # resize2fs /dev/mapper/mpatha