MSA 20 with DL380 - Slow performance

[Hernan Horigian]

Hi,
We have a Proliant 380G4 with an MSA20 attached to the onboard controller.
The Proliant has 2 72gb SCSI HD's, running on RAID 1.
The MSA has 8 500GB SATA HD's on a RAID 1 also.
The proliant has 4GB ram and a Xeon proc.
We updated the firmware to the last version in the controller, everything is updated and with last versions.
HP has been working on it for the last month 1/2 and they already changed motherboard, drives, controller, they even changed to raid 0, the only thing they did not do was changing the box, but besides that, they changed every part of it.
The Proliant works perfect. If we use it by itself, transferring files from the network to the SCSI drives inside it, it works ok.
The problem is that the transfer speed from the SCSI drives in the Proliant to the MSA, is horrible. A 1gb file, from the Proliant to the MSA, can take 20seconds the first time, that is perfect (with a simple copy/paste). After that, if the same test is repeated, it can take 4 minutes, 2 minutes, 3 minutes, but never 20 seconds. After the first time, it starts saying it will take 20 seconds, but then it slows down, stops for a while, and then continues till it took an average of 3 minutes to copy that file to the msa.
On the contrary, transfers from the MSA to the proliant, take about 40 seconds, but at least they are constant, they always take 40 seconds.
HP doesn't have any answers yet, our reseller is not taking the equipment back, not even for upgrading to an MSA 30.
We have this whole solution seating at our rack without doing nothing.