Bug#535151: linux-image-2.6-amd64: raid5 wrong sync speed calculation
On Tue, Jun 30, 2009 at 10:01:43AM +0200, Caspar Smit wrote:
> I created a raid5 md (/dev/md1) device of 16x1TB SATA disks.
This is insane. You have one redundancy out of 16.
> The speed is around 70Mb/s the whole time and the finish time starts at about 210 minutes.
No, it is not Mb/s, aka megabit per second. It is MiB/s and this per
disk.
> 16 disks raid5 = 15TB netto
> 15TB/210 min = 71GB/min = 1,19 GB/s
70*16 = 1120
I fail to see a discrepancy.
Bastian
--
Those who hate and fight must stop themselves -- otherwise it is not stopped.
-- Spock, "Day of the Dove", stardate unknown
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