Server Fault is a question and answer site for system and network administrators. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Are SAS 3Gb/s controllers (SAS1) forward compatible with newer SAS2 drives specified at 6Gb/s? The controller I have in mind is an LSI SAS1064. I know that SAS2 controllers are backwards compatible with SAS devices. I found some information in this thread:

but not a lot at

share|improve this question
I am also looking for an answer to this question. Does anyone have experience in placing a higher-capacity SAS-2 drive into an older SAS-1 server? – George Bailey Nov 23 '15 at 20:15

Yup, here is the info I found:

6Gb/s SAS is designed for backward compatibility with 3Gb/s SAS and 3Gb/s SATA

Here is anandtech testing a 6gb/s drive in both 6gb and 3gb controllers: (sata, but should be the same)

share|improve this answer
Unfortunately, the Dell links refers to 6G controllers and 3G disks. The anandtech article is about SATA. You mention that sata and sas "should be the same". Is that in the SAS spec? I do recall reading about some compatibility between SAS and SATA. – Ryan Aug 16 '11 at 17:04

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.