Hello. I do see that the MODEL: ST2000NM0001 is a supported SAS 2 TB hard drive on the T620 server. Let us know how to assist you any further.
Dear All, I have dell power edge T620 server , using sas constellation ES.3 Hard configured on Raid 1 array (2 hards) my current model : Dell Sas 2TB, MODEL: ST2000NM0023 looking to add more hards but I found only constellation ES.2 in the market Dell Sas 2TB, MODEL: ST2000NM0001   just need to insure any compatibility issue if I add this model to my server? any reply or help would be highly appreciated B regards 
add constellation ES.2 hards on my current array constellation ES.3