Kurt Yoder wrote:
What do you mean about the cache? Is my test fundamentally flawed? I *thought* I was testing write speed on the disk...
'dd', without further arguments, will write to the page cache and let the kernel write the data back at a later time. If you increase the block size (bs=1M count=1000) you should see much faster times on the host, I wouldn't be surprised to see 1GB/s.
If you want to test disk speed, use of=/dev/blah oflag=direct. Beware of destroying your data disk.
Something weird is happening with your system. If you extend the test, what does 'top' show? On both guest and host.
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