I ordered this adapter to use internal SAS for connecting a Netapp SAS array, and it's perfect for that. Double-check your connections, as there are about half a dozen different cabling/connector types. The 8087 is what I needed, and my DS4246 has the right cables for 8088 since I was using a larger SAS external adapter before.

This has worked well with my NAS. I am using it with an external disk shelf.

Good working adapter for SFF-8087 (internal SAS2) and SFF-8088 (external SAS2) on empty PCIe slot.It could be installed properly in the PCIe slot with a full-height bracket.However, It cannot be inserted into the PCIe slot with a low-profile bracket (due to a wrong direction and length of the low-profile bracket included.)According to other reviews, it should be working fine with a low-profile bracket from LSI external SAS2 RAID controller, such as LSI 9286CV-8e.Because I had a bunch of LSI 9286CV-8e controllers from Lenovo SA120 units, I could use a low-profile bracket from it.With a LSI low-profile bracket it can be mounted in the low-profile PCIe slot as expected.Other cheaper adapters (with a small gap between two SFF-8088 ports) will not work with a low-profile bracket, even though we can use an LSI one.I highly recommended this adapter for someone who wants to connect internal-external SAS2 devices with a low-profile chassis, such as 2U servers.

Tried another (less expensive) brand, and there were problems (with the adapter? cabling? HBA adapter?). This one working out of the box.

It's a little more expensive than I'd like for what it is, however this adapter worked quite well for converting an existing SAS backplane chassis into a JBOD enclosure. My RAID controller had no problems detecting the backplane/drives through this adapter, and all features such as disk hot swap and drive locate worked fine.Unlike some competing products, there was no mounting issues or bracket spacing problems -- it fit into the case just like any normal expansion card might.