Beyond Linux® From Scratch (System V Edition) - Version r12.4-1388

Chapter 5. File Systems and Disk Management

mdadm-4.4

Introduction to mdadm

The mdadm package contains administration tools for software RAID.

[Note]

Note

This version of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable version of the System V books.

Package Information

mdadm Dependencies

Optional

An MTA

Kernel Configuration

Enable the following options in the kernel configuration and recompile the kernel, if necessary. Only the RAID types desired are required. 

Device Drivers --->
  [*] Multiple devices driver support (RAID and LVM) --->                   [MD]
    <*/M>   RAID support                                            [BLK_DEV_MD]
    [*]       Autodetect RAID arrays during kernel boot          [MD_AUTODETECT]
    # Only the RAID types desired are required:
    < /*/M> RAID-0 (striping) mode                                    [MD_RAID0]
    < /*/M> RAID-1 (mirroring) mode                                   [MD_RAID1]
    < /*/M> RAID-10 (mirrored striping) mode                         [MD_RAID10]
    < /*/M> RAID-4/RAID-5/RAID-6 mode                               [MD_RAID456]

Installation of mdadm

Fix a build error introduced by gcc-15: 

sed -e "s/__u8 signature\[4\]/& __attribute__ ((nonstring))/" \
    -i platform-intel.h

Build mdadm by running the following command: 

make

This package does not come with a working test suite.

Now, as the root user: 

make BINDIR=/usr/sbin install

Command Explanations

make everything: This optional target creates extra programs, particularly a statically-linked version of mdadm. This needs to be manually installed.

Contents

Installed Programs: mdadm and mdmon
Installed Libraries: None
Installed Directory: None

Short Descriptions

mdadm

manages MD devices aka Linux Software RAID

mdmon

monitors MD external metadata arrays