LinuxQuestions.org - LUN Device Mapping: 2 devices map to same lun

Hi, I'm running Redhat IAS4 64 bit and have setup native multipathing to an EMC/Clariion array.

It now looks like /dev/sda and /dev/sdb both point to the same LUN. fdisk -l /dev/sda returns nothing whereis fdisk -l /dev/sdb returns:

Code:

Disk /dev/sdb doesn't contain a valid partition table

[root@etcad1f etc]# fdisk -l /dev/hda

[root@etcad1f etc]# fdisk -l /dev/hdb

[root@etcad1f etc]# fdisk -l



Disk /dev/cciss/c0d0: 72.8 GB, 72833679360 bytes

255 heads, 63 sectors/track, 8854 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes



          Device Boot      Start        End      Blocks  Id  System

/dev/cciss/c0d0p1  *          1          13      104391  83  Linux

/dev/cciss/c0d0p2              14        666    5245222+  83  Linux

/dev/cciss/c0d0p3            667        1710    8385930  82  Linux swap

/dev/cciss/c0d0p4            1711        8854    57384180    5  Extended

/dev/cciss/c0d0p5            1711        2493    6289416  83  Linux

/dev/cciss/c0d0p6            2494        3146    5245191  83  Linux

/dev/cciss/c0d0p7            3147        3799    5245191  83  Linux

/dev/cciss/c0d0p8            3800        8854    40604256  8e  Linux LVM



Disk /dev/sdb: 17.9 GB, 17936941056 bytes

64 heads, 32 sectors/track, 17106 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes



Disk /dev/sdb doesn't contain a valid partition table



Disk /dev/sdc: 17.9 GB, 17936941056 bytes

64 heads, 32 sectors/track, 17106 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes



Disk /dev/sdc doesn't contain a valid partition table



Disk /dev/sdd: 17.9 GB, 17936941056 bytes

64 heads, 32 sectors/track, 17106 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes



Disk /dev/sdd doesn't contain a valid partition table



Disk /dev/sde: 17.9 GB, 17936941056 bytes

64 heads, 32 sectors/track, 17106 cylinders

Units = cylinders of 2048 * 512 = 1048576 bytes

From scsi_id we see that /dev/sda and /dev/sdb are the same LUN:

Code:

[root@etcad1f etc]# scsi_id -g -s /block/sda

36006016024801c00ffca04d85a47dc11

[root@etcad1f etc]# scsi_id -g -s /block/sdb

36006016024801c00ffca04d85a47dc11

Question is: How do I remove /dev/sda ??? Or do I ???
And will that relabel the devices??? will /dev/sdb -> /dev/sda???
If so, how can I make sure the correct file gets mounted on the correct mount point?
Thanks,
Dante