mr_cb7 Posted February 27, 2015 Share Posted February 27, 2015 I'm looking at adding a raid card to my Unraid system as my mobo has 6 ports and I want to add more drives. I was looking at the recommended list for 8-port cards and saw the Supermicro. Upon pricing it with my local computer stores they have two similar ones listed. Which one should I get? Not sure. Thanks Quote Link to comment
Squid Posted February 27, 2015 Share Posted February 27, 2015 The SAS2 is a PCIe x8 device and supports SATA-III devices, whereas the older card is x4 and only supports SATA-II. If you're only ever go to use hard drives, you will never notice a difference between the two cards. If you are planning on adding SSD's, then definitely go with the SAS2 Quote Link to comment
mr_cb7 Posted February 27, 2015 Author Share Posted February 27, 2015 Thanks. at the moment only HD's but I hope someday to add an SSD as a cache drive. Just checking but by running all of my drives together off the card instead of the mobo I am going to see some performance improvements? Quote Link to comment
Squid Posted February 27, 2015 Share Posted February 27, 2015 Should be more or less the same performance. On my system, with 4 drives on the motherboard, 7 on my SAS2LP I get ~114 MB/s Peak for parity checks. Quote Link to comment
jtown Posted March 2, 2015 Share Posted March 2, 2015 You'll rarely regret having the potential for higher performance. Quote Link to comment
mr_cb7 Posted March 2, 2015 Author Share Posted March 2, 2015 Thanks. Going to swap my drives over the the card. Quote Link to comment
pras1011 Posted March 3, 2015 Share Posted March 3, 2015 I have 2 x SAS2LP with 14 drives. I thought that the more drives there are the more congestion there would be on the SASLP and this would affect the speed of parity checks/builds, preclears, disc rebuilds. My parity check speed max is about 158 MB/s. Quote Link to comment
mr_cb7 Posted March 4, 2015 Author Share Posted March 4, 2015 glad to hear it can handle a good number of drives. Quote Link to comment
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