Lines Matching +full:data +full:- +full:mirror
1 # SPDX-License-Identifier: GPL-2.0-only
18 ---help---
29 Software RAID mini-HOWTO, available from
39 ---help---
44 a several-second delay in the boot time due to various
52 ---help---
54 use the so-called linear mode, i.e. it will combine the hard disk
63 tristate "RAID-0 (striping) mode"
65 ---help---
67 use the so-called raid0 mode, i.e. it will combine the hard disk
73 Software-RAID mini-HOWTO, available from
83 tristate "RAID-1 (mirroring) mode"
85 ---help---
86 A RAID-1 set consists of several disk drives which are exact copies
87 of each other. In the event of a mirror failure, the RAID driver
91 of a single drive, and the set protects against a failure of (N - 1)
95 Software-RAID mini-HOWTO, available from
99 If you want to use such a RAID-1 set, say Y. To compile this code
105 tristate "RAID-10 (mirrored striping) mode"
107 ---help---
108 RAID-10 provides a combination of striping (RAID-0) and
109 mirroring (RAID-1) with easier configuration and more flexible
111 Unlike RAID-0, but like RAID-1, RAID-10 requires all devices to
114 RAID-10 provides a variety of layouts that provide different levels
117 RAID-10 requires mdadm-1.7.0 or later, available at:
124 tristate "RAID-4/RAID-5/RAID-6 mode"
132 ---help---
133 A RAID-5 set of N drives with a capacity of C MB per drive provides
134 the capacity of C * (N - 1) MB, and protects against a failure
135 of a single drive. For a given sector (row) number, (N - 1) drives
136 contain data sectors, and one drive contains the parity protection.
137 For a RAID-4 set, the parity blocks are present on a single drive,
138 while a RAID-5 set distributes the parity across the drives in one
141 A RAID-6 set of N drives with a capacity of C MB per drive
142 provides the capacity of C * (N - 2) MB, and protects
144 (row) number, (N - 2) drives contain data sectors, and two
146 RAID-5, RAID-6 distributes the syndromes across the drives
150 Software-RAID mini-HOWTO, available from
154 If you want to use such a RAID-4/RAID-5/RAID-6 set, say Y. To
164 MD_MULTIPATH provides a simple multi-path personality for use
186 ---help---
206 ---help---
207 Device-mapper is a low level volume manager. It works by allowing
215 called dm-mod.
222 ---help---
223 Enable this for messages that may help debug device-mapper problems.
230 ---help---
232 as a cache, holding recently-read blocks in memory and performing
238 ---help---
244 bool "Keep stack trace of persistent data block lock holders"
247 ---help---
256 ---help---
257 Some bio locking schemes used by other device-mapper targets
260 source "drivers/md/persistent-data/Kconfig"
265 ---help---
267 RAID0 or dm-striped target.
275 ---help---
276 This device-mapper target allows you to create a device that
277 transparently encrypts the data on it. You'll need to activate
280 For further information on dm-crypt and userspace tools see:
284 be called dm-crypt.
292 ---help---
300 ---help---
301 Provides thin provisioning and snapshots that share a data store.
309 ---help---
310 dm-cache attempts to improve performance of a block device by
311 moving frequently used data to a smaller, higher performance
320 ---help---
331 ---help---
345 ---help---
346 dm-era tracks which parts of a block device are written to
355 ---help---
356 dm-clone produces a one-to-one copy of an existing, read-only source
365 tristate "Mirror target"
367 ---help---
368 Allow volume managers to mirror logical volumes, also
369 needed for live data migration tools such as 'pvmove'.
372 tristate "Mirror userspace logging"
375 ---help---
377 relaying the dm-dirty-log API to userspace. Log designs
390 ---help---
393 A RAID-5 set of N drives with a capacity of C MB per drive provides
394 the capacity of C * (N - 1) MB, and protects against a failure
395 of a single drive. For a given sector (row) number, (N - 1) drives
396 contain data sectors, and one drive contains the parity protection.
397 For a RAID-4 set, the parity blocks are present on a single drive,
398 while a RAID-5 set distributes the parity across the drives in one
401 A RAID-6 set of N drives with a capacity of C MB per drive
402 provides the capacity of C * (N - 2) MB, and protects
404 (row) number, (N - 2) drives contain data sectors, and two
406 RAID-5, RAID-6 distributes the syndromes across the drives
412 ---help---
424 ---help---
428 tristate "I/O Path Selector based on the number of in-flight I/Os"
430 ---help---
432 the path with the least number of in-flight I/Os.
439 ---help---
449 ---help---
458 ---help---
465 bool "DM \"dm-mod.create=\" parameter support"
467 ---help---
468 Enable "dm-mod.create=" parameter to create mapped devices at init time.
471 See Documentation/admin-guide/device-mapper/dm-init.rst for dm-mod.create="..."
479 ---help---
485 ---help---
494 ---help---
495 This device-mapper target creates a read-only device that
496 transparently validates the data on one underlying device against
497 a pre-generated tree of cryptographic checksums stored on a second
504 be called dm-verity.
510 bool "Verity data device root hash signature verification support"
514 Add ability for dm-verity device to be validated if the
515 pre-generated tree of cryptographic checksums passed has a pkcs#7
525 ---help---
526 Add forward error correction support to dm-verity. This option
527 makes it possible to use pre-generated error correction data to
535 ---help---
536 This device-mapper target creates a device that supports an arbitrary
537 mapping of fixed-size regions of I/O across a fixed set of paths.
542 be called dm-switch.
549 ---help---
550 This device-mapper target takes two devices, one device to use
558 be called dm-log-writes.
569 ---help---
570 This device-mapper target emulates a block device that has
571 additional per-sector tags that can be used for storing
574 This integrity target is used with the dm-crypt target to
579 be called dm-integrity.
582 tristate "Drive-managed zoned block device target support"
585 ---help---
586 This device-mapper target takes a host-managed or host-aware zoned
588 device (drive-managed zoned block device) without any write
596 be called dm-zoned.