After changing the privileges on the Updates folder under Applications/Drobo Dashboard to allow my limited user account to access it, the “upgrade” to FW 1.1.3 went smoothly.
However, attempts to run Xbench after that resulted in an I/O error -35. Rebooting the Drobopro twice, and then rebooting the Mac Pro finally got me past that point, so I could talk to it again.
I didn’t quite believe the first tests I ran with Xbench, as the performance was down under 30 MBPS when it had been around 70 MPBS, at least for the first iteration.
So I tried reading/uploading a 78GB test file via Finder, and I was very impressed. The performance occasionally peaked at over 104 MPBS, and most of the time it was around 75-85 MPBS. Contrary to previous results, the performance rose to a high level immediately, whereas before it started off at about 45MBPS, and after a minute or so rose to around 90. Excellent!
Then I tried writing the same file back to the DroboPro again, again using Finder on OS-X 10.6.1. Disaster!
The write speed is running around 5 to 8.6 MBPS, with a peak so far (rerunning the test) of 13.4 MPBS.
Well, maybe there is hope after all. Suddenly the speed has jumped up to around 63 MPBS, with a peak of 72 MPBS. That, I could live with, if it can be sustained. But why is the initial period so slow? Is it doing some kind of bandwidth negotiation?
Since I don’t routinely read or write such huge files (Windows XP Backup files), I will have to run more tests to see what to performance is. I’ll delay jumping off the cliff, or sending back the DroboPro, pending further results.
Stay tuned to this channel. Your mileage may vary.