Developers Guide

Volume management

12 Dell EMC SC Series with Red Hat Enterprise Linux 7x | CML1071

2.5.4 Volume label and UUID script

This sample script parses all devices identified as vendor=”COMPELNT”, determines if any filesystem has

been applied to the volume, then extracts and displays any discovered disk label values, mpath-layer UUID,

and disk-layer UUID values.

#!/bin/bash

MP=/usr/sbin/multipath

BLKID=/usr/sbin/blkid

for i in `${MP} -ll | grep COMPELNT | cut -d" " -f1 | sort -k1`

echo "INFO: /dev/mapper/${i}"

FsTyp=`${BLKID} /dev/mapper/${i} | awk -F" " '{print $(NF)}' | cut -d= -

f2 | cut -d\" -f2`

if [ "${FsTyp}" = "" ]; then

echo "WARN: No filesystem detected"

else

echo "Multipath Info:"

/usr/sbin/dmsetup info /dev/mapper/${i} | grep UUID

echo "Filesystem Details:"

echo "Type: ${FsTyp}"

case ${FsTyp} in

xfs)

Cmd="/usr/sbin/xfs_admin -lu"

${Cmd} /dev/mapper/${i}

;;

ext4|ext3)

Cmd="/usr/sbin/tune2fs -l"

${Cmd} /dev/mapper/${i} | egrep 'volume|UUID'

;;

echo "WARN: Filesystem unknown"

;;

esac

echo

done