diff options
Diffstat (limited to 'drivers/md/Kconfig')
| -rw-r--r-- | drivers/md/Kconfig | 46 |
1 files changed, 16 insertions, 30 deletions
diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig index ac25a48362ac..bf869ed03eed 100644 --- a/drivers/md/Kconfig +++ b/drivers/md/Kconfig @@ -90,7 +90,7 @@ config MD_RAID10 depends on BLK_DEV_MD && EXPERIMENTAL ---help--- RAID-10 provides a combination of striping (RAID-0) and - mirroring (RAID-1) with easier configuration and more flexable + mirroring (RAID-1) with easier configuration and more flexible layout. Unlike RAID-0, but like RAID-1, RAID-10 requires all devices to be the same size (or at least, only as much as the smallest device @@ -104,8 +104,8 @@ config MD_RAID10 If unsure, say Y. -config MD_RAID5 - tristate "RAID-4/RAID-5 mode" +config MD_RAID456 + tristate "RAID-4/RAID-5/RAID-6 mode" depends on BLK_DEV_MD ---help--- A RAID-5 set of N drives with a capacity of C MB per drive provides @@ -116,20 +116,28 @@ config MD_RAID5 while a RAID-5 set distributes the parity across the drives in one of the available parity distribution methods. + A RAID-6 set of N drives with a capacity of C MB per drive + provides the capacity of C * (N - 2) MB, and protects + against a failure of any two drives. For a given sector + (row) number, (N - 2) drives contain data sectors, and two + drives contains two independent redundancy syndromes. Like + RAID-5, RAID-6 distributes the syndromes across the drives + in one of the available parity distribution methods. + Information about Software RAID on Linux is contained in the Software-RAID mini-HOWTO, available from <http://www.tldp.org/docs.html#howto>. There you will also learn where to get the supporting user space utilities raidtools. - If you want to use such a RAID-4/RAID-5 set, say Y. To + If you want to use such a RAID-4/RAID-5/RAID-6 set, say Y. To compile this code as a module, choose M here: the module - will be called raid5. + will be called raid456. If unsure, say Y. config MD_RAID5_RESHAPE bool "Support adding drives to a raid-5 array (experimental)" - depends on MD_RAID5 && EXPERIMENTAL + depends on MD_RAID456 && EXPERIMENTAL ---help--- A RAID-5 set can be expanded by adding extra drives. This requires "restriping" the array which means (almost) every @@ -139,7 +147,7 @@ config MD_RAID5_RESHAPE is online. However it is still EXPERIMENTAL code. It should work, but please be sure that you have backups. - You will need mdadm verion 2.4.1 or later to use this + 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 @@ -154,28 +162,6 @@ config MD_RAID5_RESHAPE There should be enough spares already present to make the new array workable. -config MD_RAID6 - tristate "RAID-6 mode" - depends on BLK_DEV_MD - ---help--- - A RAID-6 set of N drives with a capacity of C MB per drive - provides the capacity of C * (N - 2) MB, and protects - against a failure of any two drives. For a given sector - (row) number, (N - 2) drives contain data sectors, and two - drives contains two independent redundancy syndromes. Like - RAID-5, RAID-6 distributes the syndromes across the drives - in one of the available parity distribution methods. - - RAID-6 requires mdadm-1.5.0 or later, available at: - - ftp://ftp.kernel.org/pub/linux/utils/raid/mdadm/ - - If you want to use such a RAID-6 set, say Y. To compile - this code as a module, choose M here: the module will be - called raid6. - - If unsure, say Y. - config MD_MULTIPATH tristate "Multipath I/O support" depends on BLK_DEV_MD @@ -235,7 +221,7 @@ config DM_SNAPSHOT tristate "Snapshot target (EXPERIMENTAL)" depends on BLK_DEV_DM && EXPERIMENTAL ---help--- - Allow volume managers to take writeable snapshots of a device. + Allow volume managers to take writable snapshots of a device. config DM_MIRROR tristate "Mirror target (EXPERIMENTAL)" |