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Re: raidframe performance question

On Fri, 6 May 2011, Thor Lancelot Simon wrote:

On Fri, May 06, 2011 at 07:32:39PM -0700, Paul Goyette wrote:
Conclusion:  these disk drives suck!  It's not a raidframe problem....


I gave up on the first attempt to initialize the parity after it had
been running for > 30 hours.  I tried to reboot, but unfortunately
the system paniced (something about a flush-cache not finishing).

After rebooting, I started a

        dd if=/dev/zero bs=32k of=/dev/wd4d

No.  rwd4d.


Yeah, it works much better on the raw device. After 10 minutes, the rate has remained constant at 100MBytes/sec. And I can even run a second dd on the other prospective raid member and they _both_ run at 100MByte/sec.

At this rate it will take about 1.5 hours to zero the entirety of both drives, then I can start reassembling the raidset.

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