Change in UUID while upgrade - Red Hat Customer Portal

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Issue

Before upgrade:
Entry in /etc/fstab file:

/dev/sda2: LABEL="/partB" UUID="a69619e1-649a-43e6-85bf-c072f8c39e14" SEC_TYPE="ext2" TYPE="ext3”

Output of sudo blkid command:

/dev/sda2: LABEL="/partB" UUID="a69619e1-649a-43e6-85bf-c072f8c39e14" SEC_TYPE="ext2" TYPE="ext3”

During upgrade:
Entry in /etc/fstab file:

/dev/sda2: LABEL="/partB" UUID="a69619e1-649a-43e6-85bf-c072f8c39e14" SEC_TYPE="ext2" TYPE="ext3”

Output of sudo blkid command:

/dev/sda2: LABEL="/partB" UUID="1c9eb856-2976-4f4d-a500-b6f3e1accdc8" SEC_TYPE="ext2" TYPE="ext3"

Environment

RHEL 5.3, upgrading to RHEL 6

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