HP DL380 G5 and SC08e SAS Card

I’ve been asked several times if this combination will work, I guess the HP site says they are not compatible… or at least doesn’t list them as being tested and working. We do have a customer that runs an SC08e card in a DL320 G5p and it works fine, but my best guess as to why HP does not list the G5 models as supported for the SC08e card is because of the PCI-Express bus in those servers.

Stuff you probably don’t care about

PCI-Express 2.0 was announced in early 2007, but motherboards did not ship with PCI-E until August of 2007. The HP DL380 G5 looks like it started shipping in early 2007, so it came with PCI-Express 1.1 (at best).

The big difference between PCI-Express 1.0 and 2.0 is the bandwidth that the interface receives, basically 2 is twice as fast as 1. So even though we have a 6Gbps SAS interface on the outside of the card, we will only have 4Gbps on a PCI-E 1.0 x8 interface… where as we have 8Gbps on a PCI-E 2.0 interface. Also the PCI-E 2.0 cards run at a 5Ghz frequency and the 1.0 cards only run at 2.5GHz, although the PCI-Express specifications say that most 2.0 cards WILL work in a 1.0 motherboard slot.

Anyhow… no one usually cares about that stuff so on to the stuff you really care about.

Will it work or not?

On Saturday i stopped by the office to test out if the cards would really work. I tried the cards in two different servers that are not on the Supported list from HP, the first was a DL385 G2 and the second was the DL380 G5. The reason I tested on a DL385 G2 is because they are the AMD equivalent of a G5 Intel box, and because we have 6 of them in our VMware lab.

Anyhow the DL385 G2 worked great, I transfered some VM’s from one LUN to another and I was able to achieve speeds that were the same as I could on DL380 G7 servers. This first screen shot shows that it is a DL385 G2 server, and my SAN LUNs are named SAN_LUN1 and SAN_LUN2

The second screen shot is of the performance graph while moving a VM from LUN1 to LUN2, and while doing so it achieved over 375MB/s which is the same as I seen a couple weeks ago when I paired a P2000 G3 SAS to a cluster of DL380 G7 boxes.

The second server I tested the SC08e card on was the DL380 G5, I did not hook the SAN to it as I only had enough time to shut it down, install the card, and then verify that it was found… but I see no reason why it would not achieve similar results. So my recommendation to all the people who have asked if the SC08e will work in a DL380 G5 is that it will work. I cannot however guarantee that HP will support it if you call them… as they are just going to go by what is on their spec pages.


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5 Responses to "HP DL380 G5 and SC08e SAS Card"

  1. I called HP support yesterday asking to recommend a card for my DL360 G5 and they recommended the SC08e to me. I even mentioned that I did not see the G5 line listed in the description and they said it would work fine.

  2. I installed a SC08e in a DL380 G5, hoping to get some more life out of it. We setup a new p2000 G3SAS with two other newer hosts, (DL360 G8’s) I configured the two other hosts and 6 disks in the p2000 in cluster. When I went to install the DL380 G5, it “kinda” see’s the P2000 but it doesn’t show both arrays I have configured. And I’m unable to get to the two datastores. I contacted HP, they gave me the “isn’t supported” run around. Any ideas on what I’m doing wrong? Am I not able to see the datastores because they are in a cluster that the server isn’t associated with? Any assistance would be awesome. (Esxi5.1 Essentials)

  3. Hard to say without taking a look. Make sure that all of the volumes are presented to that server. Also make sure that both controllers in the P2000 can see that host.

  4. Yeah, I understand. Both controllers see the host, and it says there are two maps to all hosts on the MSA. (I have two raid5 vdisks) What about that storage cluster I have setup in vsphere? Because the older server isn’t in the same cluster, (it isn’t in any) would that be limiting the ability for the host to even see the datastores? I wouldn’t think so. I was going to contact vmware and see if they could assist with that question. I’m about ready to just give up and not use the SAN with the older server at this point.

  5. Storage Clusters should not affect whether the host sees the datastores or not. To do any further troubleshooting i would need to see it or at least get the logs from ESXi

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