After installing sles11 sp2 on an HP DL380 the following error is displayed during boot on several servers:
[ 15.130156] scsi 0:0:2:1: Direct-Access EMC SYMMETRIX 5874 PQ: 0 ANSI: 4^M
[ 15.539137] scsi 0:0:2:2: Direct-Access EMC SYMMETRIX 5874 PQ: 0 ANSI: 4^M
[ 15.901360] lpfc 0000:0b:00.1: 1:1303 Link Up Event x1 received Data: x1 x1 x20 x0 x0 x0 0^M
[ 16.361938] ------------[ cut here ]------------^M
[ 16.593961] WARNING: at /usr/src/packages/BUILD/kernel-default-3.0.13/linux-3.0/fs/sysfs/dir.c:455 sysfs_add_one+0xb7/0xe0()^M
[ 17.157151] Hardware name: ProLiant DL380 G7^M
[ 17.371612] sysfs: cannot create duplicate filename '/devices/pci0000:00/0000:00:08.0/0000:0b:00.0/host0/rport-0:0-4/target0:0:2/0:0:2:2/dh_state'^M
[ 18.032335] Modules linked in: scsi_dh lpfc scsi_transport_fc scsi_tgt hpsa cciss scsi_mod^M
[ 18.444105] Supported: Yes^M
[ 18.579900] Pid: 5, comm: kworker/u:0 Not tainted 3.0.13-0.27-default #1^M
[ 18.915992] Call Trace:^M
[ 19.038553] [<ffffffff810048b5>] dump_trace+0x75/0x300^M
[ 19.300724] [<ffffffff8143ea0f>] dump_stack+0x69/0x6f^M
....
facts:
# the server was running sles11 sp1 for over a year before, no problems
# the same boot problem on a handfull of similar servers
# but 30+ servers also installed with sp2 (and sp1 before) do not show this problem
# all our servers boot from SAN (EMC DMX/VMAX)
# the problematic sp2-servers all have at least 4 SAN-volumes, where as the working sp2-servers usually have one boot and one data volume

Has any one ever had the same or a similar problem or behaviour? and what could be the cause or the cure?