Multipath MS500 G2 Problem

[Wilder Mellotto]

Hi.

We have a MS500 G2 storage attached to a DL380 using two Smart Array 642 SCSI running Red Hat Enterprise Server 4.

We have 1 LUN (2 discs - RAID 1) and this LUN has two paths in Linux:
/dev/cciss/c1d0
/dev/cciss/c2d0

When we tried to enable Multipath with mdadm mannualy, it works, but we cannot do this change persistent on boot.

Add /dev/md0 with command:
mdadm -C /dev/md0 -l multipath -n 2 /dev/cciss/c1d0p1 /dev/cciss/c2d0p1
WORK.

Reboot the system - doesn't work, and this message appears:
mdadm: failed to add /dev/cciss/c1d0p1 to /dev/md0: Device or resource busy
mdadm: /dev/md0 has been started with 2 drives and -1 spares.

Please, help me.

[Marco Bisio]

Please, does someone answer to you ? I have the same problem, and I am unable to fix it.
Thank you a lot for your help


Marco Bisio