Am wondering if those Intel 520 (SATA) are connected directly to expander or via interposer?

AFAIK SATA drives cannot be connected to dual expanders which 847E26 is.

Or they could be connected while expander connected only via single link?

Hotspare size is different to main drives 3TB vs 2TB?

Br

Peter

Yea, i was wondering the same thing about the 520's. I've also heard of people hacking together a way to fit the drives in the sled with an interposer.

Also, i am using the 847E26-RJBOD as well, do you have a working picture of the back of the unit when it comes to the slotmap? I noticed that they support the 847, but not the JBOD version when it comes to the slotmap part. See my post here:

http://nexentastor.org/boards/2/topics/5922

Having trouble getting help from Nexenta support on it, which is frustrating, but i know they are probably racing towards v4, which i get, so im keeping my complaining to a minimum. lol.

Hello,

Peter: Oops my bad, The Hotspares are 3TB :) I don't not have the JBOD in dual path mode as the all the drives in JBOD are SATA.

Steve: I have the issue with the slot map as well!! Well it doesn't show one. Helpful when a drive fails. :) I had an issue where a drive failed and the indicator light wouldn't show the disk. It was hard to the track failed drive.

I am really looking forward to V4 as well!

Cheers R

Some benchmark would be nice.

• local
• iscsi --- see this post http://communities.vmware.com/thread/197844

Hello,

Here are the IO Meter Results, these where run with all VM's operational. I decided to run it against the NFS and iSCSI targets. I am not sure if these are good or not.

Cheers R

Results:

File Size 8GB

Guest OS: Windows 2008R2 VM, 8GB RAM.

iSCSI:                IOPs  MBps  Av Res (ms)   %CPU
Max Throughput-100%READ  21222 663 3 48
RealLife-60%Rand-65%READ 6130   48 7 77
Max Throughput-50%READ   14521 454 4 38
Random-8k-70%READ        8765   68 4 73

NFS:  
Max Throughput-100%READ  19726 616 3 41
RealLife-60%Rand-65%READ 9983   78 4 74
Max Throughput-50%READ   10121 316 6 32
Random-8k-70%READ        9199   72 3 83

You might be getting some artifact readings by having your test file size be the same as your OS RAM size. Try using a test file of 16GB since this would still fit in the ARC (if you're testing cached performance), or 24-48GB if you want to test the L2ARC performance. If you know what size your active set is (this is the data that is either changing or constantly being read) you could also test with that size. Also what is your Queue Depth in IOMeter?

The numbers don't seem bad to me though.

Regarding the SC847 JBOD version of the slotmap not showing, here is what i did to get around it, might be worth checking out before you have to locate another disk:

http://hardforum.com/showthread.php?p=1038604396#post1038604396