linux查看raid信息
有时我们需要看一下服务器的raid信息.
１.软件raid的话可以通过 cat /proc/mdstat
md1 : active raid1 sdb3[1] sda3[0]
480572352 blocks [2/2] [UU]
md3 : active raid1 sdb2[1] sda2[0]
1952704 blocks [2/2] [UU]
md2 : active raid1 sda1[0] sdb1[1]
194496 blocks [2/2] [UU]
我的是做了软raid1(sda,sdb两块硬盘).软raid会将设备标记为mdN(硬件raid不会,硬件raid对外表现就像没做raid一样)
2.也可以通过dmesg,比如我的dmesg | grep -i raid
[ 1.020628] md: raid0 personality registered for level 0
[ 1.024236] md: raid1 personality registered for level 1
[ 1.196998] raid6: int64x1 2119 MB/s
[ 1.366685] raid6: int64x2 2724 MB/s
[ 1.536404] raid6: int64x4 1841 MB/s
[ 1.706119] raid6: int64x8 1770 MB/s
[ 1.875805] raid6: sse2x1 5876 MB/s
[ 2.045514] raid6: sse2x2 6967 MB/s
[ 2.215220] raid6: sse2x4 7653 MB/s
[ 2.215221] raid6: using algorithm sse2x4 (7653 MB/s)
[ 2.221300] raid1: raid set md3 active with 2 out of 2 mirrors
[ 2.223621] raid1: raid set md2 active with 2 out of 2 mirrors
[ 2.226764] raid1: raid set md1 active with 2 out of 2 mirrors
[ 2.268897] md: raid6 personality registered for level 6
[ 2.268899] md: raid5 personality registered for level 5
[ 2.268901] md: raid4 personality registered for level 4
[ 2.273807] md: raid10 personality registered for level 10
看raid１的那三行.
我的dell服务器的硬件raid利用dmesg | grep -i raid结果如下
[ 4.051200] megaraid_sas 0000:03:00.0: PCI INT A -> GSI 38 (level, low) -> IRQ 38
[ 4.051306] megaraid_sas 0000:03:00.0: setting latency timer to 64
[ 4.169477] scsi4 : LSI SAS based MegaRAID driver.
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