On Dec 30, 2005, at 3:11 PM, Yeechang Lee wrote:

Brad wrote:
Are you sure you don't have a drive failure? RAID 5 will continue on =
normally but your speed will sink fast if a drive fails.

I am well aware of how mdadm handles drive failures and how to monitor
the array's and drives' health. Believe me, they're fine as far as I
can tell. And as I've written, iostat shows all drives in the array
with similar performance measures.

You've checked all the stuff I would check, then. Next I would start questioning the RAID card or hardware connections. Write speeds of 7-10MB/sec is what I would expect out of RAID 5 with ATA-100, 2MB cache drives.

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