After upgrading one server SLES 11 SP1 to SP2 which has multipath in it, the file system change to use /dev/mapper/****. Before that, it use /dev/sdaN.
I also upgrade the other servers which do not use the multipath and no SAN attached, the file system remain to use /dev/sdaN . ONLY for the server that has multipath, it suddenly change to /dev/mapper after the upgrade. Is it the new features regarding the Service Pack 2. Can someone help me on this to verify if this is normal or not and some explanation.

Before Upgrade (SLES SP1):

Filesystem Size Used Avail Use% Mounted on
/dev/sda2 69G 39G 27G 59% /
devtmpfs 16G 252K 16G 1% /dev
tmpfs 16G 104K 16G 1% /dev/shm
/dev/sda1 92M 31M 56M 36% /boot
/dev/sda4 20G 11G 8.2G 57% /opt
/dev/sda5 9.9G 216M 9.2G 3% /tmp
/dev/sda3 20G 7.0G 12G 38% /usr
504G 23G 456G 5% /home/db2inst1

After upgrade to SLES SP2:

Kernel: 3.0.13-0.27-default

Filesystem Size Used Avail Use% Mounted on
/dev/mapper/3600605b002f69e3014d025e31645bcf0_part6 80G 7.5G 69G 10% /
devtmpfs 16G 340K 16G 1% /dev
tmpfs 16G 100K 16G 1% /dev/shm
/dev/mapper/3600605b002f69e3014d025e31645bcf0_part1 92M 46M 41M 53% /boot
/dev/mapper/3600605b002f69e3014d025e31645bcf0_part4 20G 9.4G 9.4G 51% /opt
/dev/mapper/3600605b002f69e3014d025e31645bcf0_part5 9.9G 1.4G 8.0G 15% /tmp
/dev/mapper/3600605b002f69e3014d025e31645bcf0_part3 20G 7.3G 12G 39% /usr