Slow speed with Open-E and vSphere ESXi 4

[To-M]

What version of the DSS V6 arr you running?

Do you have the 3Ware set for "Performance" using the Write Back Cache?

Do you have the Write Back set for the LUN in the Target?

We see that you sent in for a support Ticket but you did not provide any logs to help you. Please send in the Log file from the GUI.

[cgnobi]

I am running the version dss6.0up45_b4622.oe_i I do have the 3 ware cards set to performance also. However How do I set up write back for the lun? On the card it is set is that what you mean?

I also sent in the Log files, it took me a bit since I completely wiped the configuration of the drives to start over with raid 10 again.

Thanks for the Response.

[To-M]

For the iSCSI Target / LUN set the WB "Write Back" option.

Check that your RAID 10 is set for the followin on your controller as this is what I know they recommend.


Stripe Size: 256KB
Read Cache: Intelligent (default) good for streaming
Read Cache: Basic good for random small block I/O
Write Cache: On (default)
Disk Cache: Enabled (default)
Storsave: Perform
Autoverify: Off
Rapid Recovery: Disable
Rebuildmode: Low Latency
Verifymode: Low Latency

For LSI on a RAID 10 (also for RAID 0 & 1)

Stripe Size: 256KB
Read Policy: Always Read Ahead
Write Policy: Write Thru (For streaming sequential performance)
Write Back (For transactional/random tests)
IO Policy: Direct IO
Disk Cache Policy: Enabled

[cgnobi]

everything is set I believe to what you posted.
I also saw that the drives were only running at 1.5g instead of 3g now they are running all at 3g however no change in the write speeds.
Would setting up a software raid0 across the 2 3ware controllers Raid 10's be a performance boost or hindrance?
Thanks

[To-M]

RAID 0 will be fast and 10 as well for testing, I would check the log file mainly the test.log and look at the NICs to see if they showing any issues and the hdparm to see the speed of the array in the test.log file.