CONFIG_MD_RAID6: RAID-6 mode

General informations

The Linux kernel configuration item CONFIG_MD_RAID6 has multiple definitions:

RAID-6 mode found in drivers/md/Kconfig

The configuration item CONFIG_MD_RAID6:

• prompt: RAID-6 mode
• type: tristate
• depends on: CONFIG_BLK_DEV_MD
• defined in drivers/md/Kconfig
• found in Linux kernels: 2.6.12–2.6.17
• modules built: raid6, xor

Help text

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.

RAID-6 mode (EXPERIMENTAL) found in drivers/md/Kconfig

The configuration item CONFIG_MD_RAID6:

• prompt: RAID-6 mode (EXPERIMENTAL)
• type: tristate
• depends on: CONFIG_BLK_DEV_MD && CONFIG_EXPERIMENTAL
• defined in drivers/md/Kconfig
• found in Linux kernels: 2.6.2–2.6.11
• modules built: raid6, xor

Help text

WARNING: RAID-6 is currently highly experimental. If you use it, there is no guarantee whatsoever that it won't destroy your data, eat your disk drives, insult your mother, or re-appoint George W. Bush.

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 N.

Hardware

LKDDb

Raw data from LKDDb:

• lkddb module raid6 CONFIG_MD_RAID6 : drivers/md/Kconfig : "RAID-6 mode" # in 2.6.2–2.6.17
• lkddb module xor CONFIG_MD_RAID6 : drivers/md/Kconfig : "RAID-6 mode" # in 2.6.2–2.6.17

Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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