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Hi, |
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|
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I'm creating /dev/md's for my server with: |
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mdadm --create --verbose /dev/md0 |
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--level=1 --raid-devices=2 |
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/dev/sda1 /dev/sdb1 |
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|
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and I have noticed following thing: |
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|
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Whenever I create /dev/md0 on a "clean" (not previously |
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formated) disk, the syncing speed is high (30-40MB/s, |
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as shown by "cat /proc/mdstat". |
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|
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But when I try to create raid array on partitions which |
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have been previously formated (there remained old ext3 |
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formating), syncing speed is not higher than 2-3MB/s |
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(~15 hours syncing my 160 GB drives!!!). |
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|
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One more thing: if I delete all partitions, and then write |
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them back again exactly as they were previously, it doesn't |
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help. But if I shift all partitions just 1 sector up |
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(or down), mdadm is again syncing with full speed... |
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|
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Question: how can I sync with full speed, even if |
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there are partitions previously used and formated |
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and I do not want (or can not) move partitions? |
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|
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Jarry |
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-- |
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