If unsure, say N.
+config MD_AUTODETECT
+ bool "Autodetect RAID arrays during kernel boot"
+ depends on BLK_DEV_MD=y
+ default y
+ ---help---
+ If you say Y here, then the kernel will try to autodetect raid
+ arrays as part of its boot process.
+
+ If you don't use raid and say Y, this autodetection can cause
+ a several-second delay in the boot time due to various
+ synchronisation steps that are part of this step.
+
+ If unsure, say Y.
+
config MD_LINEAR
tristate "Linear (append) mode"
depends on BLK_DEV_MD
config MD_RAID456
tristate "RAID-4/RAID-5/RAID-6 mode"
depends on BLK_DEV_MD
+ select MD_RAID6_PQ
select ASYNC_MEMCPY
select ASYNC_XOR
---help---
If unsure, say Y.
-config MD_RAID5_RESHAPE
- bool "Support adding drives to a raid-5 array"
- depends on MD_RAID456
- default y
- ---help---
- A RAID-5 set can be expanded by adding extra drives. This
- requires "restriping" the array which means (almost) every
- block must be written to a different place.
-
- This option allows such restriping to be done while the array
- is online.
-
- You will need mdadm version 2.4.1 or later to use this
- feature safely. During the early stage of reshape there is
- a critical section where live data is being over-written. A
- crash during this time needs extra care for recovery. The
- newer mdadm takes a copy of the data in the critical section
- and will restore it, if necessary, after a crash.
-
- The mdadm usage is e.g.
- mdadm --grow /dev/md1 --raid-disks=6
- to grow '/dev/md1' to having 6 disks.
-
- Note: The array can only be expanded, not contracted.
- There should be enough spares already present to make the new
- array workable.
-
- If unsure, say Y.
+config MD_RAID6_PQ
+ tristate
config MD_MULTIPATH
tristate "Multipath I/O support"
config DM_MULTIPATH
tristate "Multipath target"
depends on BLK_DEV_DM
- select SCSI_DH
+ # nasty syntax but means make DM_MULTIPATH independent
+ # of SCSI_DH if the latter isn't defined but if
+ # it is, DM_MULTIPATH must depend on it. We get a build
+ # error if SCSI_DH=m and DM_MULTIPATH=y
+ depends on SCSI_DH || !SCSI_DH
---help---
Allow volume managers to support multipath hardware.
-config DM_MULTIPATH_EMC
- tristate "EMC CX/AX multipath support"
- depends on DM_MULTIPATH && BLK_DEV_DM
- ---help---
- Multipath support for EMC CX/AX series hardware.
-
-config DM_MULTIPATH_RDAC
- tristate "LSI/Engenio RDAC multipath support (EXPERIMENTAL)"
- depends on DM_MULTIPATH && BLK_DEV_DM && SCSI && EXPERIMENTAL
- ---help---
- Multipath support for LSI/Engenio RDAC.
-
-config DM_MULTIPATH_HP
- tristate "HP MSA multipath support (EXPERIMENTAL)"
- depends on DM_MULTIPATH && BLK_DEV_DM && SCSI && EXPERIMENTAL
- ---help---
- Multipath support for HP MSA (Active/Passive) series hardware.
-
config DM_DELAY
tristate "I/O delaying target (EXPERIMENTAL)"
depends on BLK_DEV_DM && EXPERIMENTAL