aws上创建raid0:

mdadm --create /dev/md0 --level=0 -c256 --raid-devices=8 /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm

echo 'DEVICE /dev/sdf /dev/sdg /dev/sdh /dev/sdi /dev/sdj /dev/sdk /dev/sdl /dev/sdm' > /etc/mdadm.conf

mdadm --detail --scan >> /etc/mdadm.conf

blockdev --setra 65536 /dev/md0

mkfs -t ext3 /dev/md0

mount /dev/md0 /data1/test 

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