unable to create vmkernel dump file

I have here 4 IBM X3650 M2 (7947-52G) with a clean install ESX 4.0.0 244038

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UEFI 1.07 D6E145FUS (upraded from 1.04)

IMM YU0057H 1.10 (upgradd from 1.05)

Diagnostics v233

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  All 4 have the same issue. It is not possible to create a coredump

# esxcfg-dumppart -l

VM Kernel

Name                               Console

Name                                 Is Active   Is Configured

naa.600508e0000000001b3b0eef5553be07:2     

/dev/sde2                                    yes         yes

#  esxcfg-dumppart -c

naa.600508e0000000001b3b0eef5553be07:2  /dev/sde2

# esxcfg-dumppart --copy --devname /vmfs/devices/disks/naa.600508e0000000001b3b0eef5553be07:2

Single slot coredump

Error running command. Unable to copy the dump partition: Couldn't find a valid VMKernel dump file. Dump partition might be uninitialized.

I already deactivated (-d) and reactivated (-a)  and smart-activated (-S) the partition 

I also checked KB entries with no luck

Setting up a VMKcore partition to capture purple screen output

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1000328

Manually regenerating core dump file in VMware ESX

http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1002769

The only hint I found was in http://communities.vmware.com/thread/217385 but I am not sure that this could be a firmware issue with a controller.

I also attached outputs from fdisk and from  vmfs disks output, esxcfg-scsidevs and lspci

Thanks for helping.

regards

Andreas