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Supermicro 847 build help

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Mads

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Feb 16, 2017
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Need a bit of newbie guidance..

End goal: A 10Gbe server to keep AV media at working speed for single user production. Inspired by popular cinevate 10gbe guide (http://www.cinevate.com/blog/confessions-of-a-10-gbe-network-newbie-part-1-basics/).

Went and bought
- Supermicro SE-847E16-R1K28LPB (here: http://www.ebay.com/itm/132071105467) with 192GB DDR3. It has a single LSI card with one 8087 connector supplying both back planes (24+12) as far as I can tell.
- 32x 3Tb enterprise SATA drives. I was thinking 3x 6drive raidz2 initially with the rest used for hot spares and a backup solution.
- 10gbe intel adapters

Question:
- will I not be limited by single 8087 bandwidth to the drives? I wasn't aware, but this (http://www.natecarlson.com/2010/05/07/review-supermicros-sc847a-4u-chassis-with-36-drive-bays/) advises to get the 847"A" version for freenas to get more lanes. If I need to change stuff, is this an easy fix or should I change chassis to begin with? Time is limited, money less so, and would rather this be right from the get go (but obviously don't want to burn unnecessary cash)

If you have a good resource for newbies on back planes and expanders I think I need to read that.

Best regards
 
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Spearfoot

He of the long foot
Moderator
Joined
May 13, 2015
Messages
2,266
Need a bit of newbie guidance..

End goal: A 10Gbe server to keep AV media at working speed for single user production. Inspired by popular cinevate 10gbe guide (http://www.cinevate.com/blog/confessions-of-a-10-gbe-network-newbie-part-1-basics/).

Went and bought
- Supermicro SE-847E16-R1K28LPB (here: http://www.ebay.com/itm/132071105467) with 192GB DDR3. It has a single LSI card with one 8087 connector supplying both backplates (24+12) as far as I can tell.
- 32x 3Tb enterprise SATA drives. I was thinking 3x 6drive raidz2 initially with the rest used for hot spares and a backup solution.
- 10gbe intel adapters

Question:
- will I not be limited by single 8087 bandwidth to the drives? I wasn't aware, but this (http://www.natecarlson.com/2010/05/07/review-supermicros-sc847a-4u-chassis-with-36-drive-bays/) advises to get the 847"A" version for freenas to get more lanes. If I need to change stuff, is this an easy fix or should I change chassis to begin with? Time is limited, money less so, and would rather this be right from the get go (but obviously don't want to burn unnecessary cash)

If you have a good resource for newbies on back planes and expanders I think I need to read that.

Best regards
Welcome to the forums!

This thread might be a good place to start w/ respect to backplanes and expanders:

https://forums.freenas.org/index.php?threads/confused-about-that-lsi-card-join-the-crowd.11901/

Good luck!
 

Mads

Newbie
Joined
Feb 16, 2017
Messages
2
Thanks a lot - that was helpful.

For anyone else with same issue, I also learned a good bit from this: https://forums.freenas.org/index.ph...-sas-sy-a-primer-on-basic-sas-and-sata.26145/

If I understand correctly, with one SFF8087 supplying even 24 drives in the bigger of the back planes I've got 24Gbps and thus first of all, way more than my 10GbE connection will allow and secondly, won't realistically even in best of sequential transfers reach that bandwidth with 24 conventional 7200rpm spinners.
 
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