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.