I have a couple of new R730 servers with a PERC H730, 16-disk expander backplane and a couple of 300GB 15k SAS disks.
When I put the H730 into HBA/Non-RAID mode everything appears to work fine - I can install an OS - but disk performance is truly horrible. I managed only about 60Mb/s write speed and the service times went up to in excess of 300ms. However, if I put each disk in its own RAID0 and performance is fine. Everything is on latest firmware (as of last night) and I've tried a few different operating systems (Linux, FreeBSD, Solaris) and they all exhibit the same problem.
Here's some stats from Solaris in HBA mode:
extended device statistics ---- errors ---
r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device
0.0 142.0 0.0 11.6 0.0 10.0 0.0 70.4 0 100 0 0 0 0 c0t0d1s0
0.0 142.6 0.0 11.6 0.0 10.0 0.0 70.1 0 100 0 0 0 0 c0t1d1s0
and with RAID0:
extended device statistics ---- errors ---
r/s w/s Mr/s Mw/s wait actv wsvc_t asvc_t %w %b s/w h/w trn tot device
0.0 2829.2 0.0 232.0 0.0 9.8 0.0 3.5 2 99 0 0 0 0 c0t0d0s0
0.0 2823.6 0.0 231.5 0.0 9.9 0.0 3.5 2 100 0 0 0 0 c0t1d0s0
That's more like it!
I've reset the card to factory defaults several times and tried the two different available firmwares for the H730 and the two that are available for the backplane - no difference.
Does anyone have any ideas?
Is anyone using the H730 in HBA mode?
Thanks,
Barney