> Call me crazy, but I'm guessing you never let it finish syncing in the > first place. When syncing, it caps its own throughput at some > arbitrary amount the code deems sensible. Sounds like it never > un-capped, suggesting you never let it complete the sync process before > benching it. Further evidence that both numbers are so > remarkably the same also suggests that. Depending on the size of the > dataset, it could take a while to finish. I could swear that I recall > there being some parameter which allows you to create a mirror but skip > the sync step. If you do that, then basically you're swearing on the > storage bible that both volumes were zeroed before the mirror creation, > and the first thing you did after creating the volume was mkfs. > Personally I've never tried it, and searching the documentation, I > can't find it now, so perhaps that was just a bad dream I had.
Hi Andrew, Thanks for the response. Indeed, we did let it finish syncing.. we had to let it run overnight to finish syncing. But, we also noticed that while it was syncing /dev/sda to /dev/sdc, the sync rate as observed in /proc/mdstat and iostat was limited to 200MB/sec. -Bond _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
