查看Raid 狀況 mdadm --detail /dev/md*
raid-check的cronjob
/etc/cron.d/raid-check
# Run system wide raid-check once a week on Sunday at 1am by default
0 1 * * Sun root /usr/sbin/raid-check
改變目前speed_limit_max 和 speed_limit_min
In centos 6 dns 2 and 3 20180421 更改 /etc/sysctl.conf
#nono /etc/sysctl.conf
增加
dev.raid.speed_limit_max = 100000
dev.raid.speed_limit_min = 50000
nano /proc/sys/dev/raid/speed_limit_min