Hello Torsten, You can use 2 SAS 6gb cards in an T620 and it will work to connect to your Quantum i500.  The 2 SAS6gb cards just need to be in an 8x PCIe slot which there is 2 in the T620 & those are slot 1 &6.  If both of those are slots are full then you should be able to put them into one of the X16 slots & that will work as well.  Your x16 slots are 2,4,5,7on your motherboard. Please let us know if you have any other questions.
hi,  any reason not to use an T620 Rackmount with two Dell SAS 6GBit HBA to backup on 4 LTO-6 SAS devices (Quantum i500)? e.g. bandwidth on PCI x8 Lane --> PCIe 2.0 HBA --> 2x LTO-6 SAS on one HBA... fileserver is connected with an Intel 520 SFP+ DA Cable to a Procurve Switch  Backupserver is connected with an Intel 520 SFP+ Optical Receiver to the same Switch   LSI 9207-8e is also an option but more expensive than dell labeled HBAs from LSI (of course it is PCIe 3.0 too ^^) or an LSI SAS 3801E HBA... but that is PCIe 1.1a and i am not sure if that works with 2x 400MiB/s theoretical maximum speed on LTO-6 Devices. LSI SAS 9200-8e HBA is PCIe 2.0     feedback is welcome  kind regards Torsten
Dell T620(Rack) vs. 4x LTO-6 SAS