linux kernel configuration for software raid
From thelinuxwiki
Check for support
If your system has RAID support, you should have a file called /proc/mdstat. If you do not have that file, maybe your kernel does not have RAID support.
Symbol: MD_RAID456 [=y] Type : tristate Prompt: RAID-4/RAID-5/RAID-6 mode Location: -> Device Drivers -> Multiple devices driver support (RAID and LVM) (MD [=y]) -> RAID support (BLK_DEV_MD [=y]) Defined at drivers/md/Kconfig:121 Depends on: MD [=y] && BLK_DEV_MD [=y] Selects: RAID6_PQ [=y] && ASYNC_MEMCPY [=y] && ASYNC_XOR [=y] && ASYNC_PQ [=y] && ASYNC_RAID6_RECOV [=y] Selected by: DM_RAID [=m] && MD [=y] && BLK_DEV_DM [=m]
Links
this guide is recommended by the linux kernel help... [Software RAID HOWTO]