Preparing RHEL LUNs with mount points using DMMP device names for transition using the Inventory Assessment Workbook
Before transition of a LUN with a mount point using a DMMP device name, you must replace the DMMP device name with its respective file system UUID number. This applies to Red Hat Enterprise Linux (RHEL) 5 and RHEL 6.
This procedure applies to copy-based transitions and copy-free transitions.
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Gather pretransition information from the Inventory Assessment Workbook.
Specifically, you need the following information:
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The file system configured on the DMMP device
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The directory on which the DMMP device is mounted
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The file system UUID for the DMMP device
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Verify that the mount points for the DMMP device are defined in the `/etc/fstab `file.
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Create a backup of the file:
cp /etc/fstab /etc/fstab_pre_transition
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Edit the
/etc/fstab
file to replace the DMMP device name with its respective file system UUID number.In the following example, the DMMP device /dev/mapper/360a9800037534562572b453855496b41 is replaced by UUID a073547e-00b6-4bf9-8e08-5eef08499a9c:
[root@IBMx3550M3-229-169 ~]# cat /etc/fstab /dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5, mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0 /dev/mapper/test_vg-test_lv /mnt/lvm_ext3 ext3 defaults,_netdev 0 0 UUID=a073547e-00b6-4bf9-8e08-5eef08499a9c /mnt/dmmp_ext3 ext3 defaults,_netdev 0 0
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