I have a Dell PE2590 with a PERC5 handling a 6 disk RAID5 array. Write-back caching is enabled but it's defaulting to write-through. This is obviously murdering performance (writes = 30Mbps vs 300Mbps ...

That's a great article, thanks for the post. Quick synopsis for the harried: the default write-through cache seriously impairs throughput on both RAW and QCOW2 images. Setting either no cache on your ...

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