mdtab5

Overview

/etc/mdtab is a configuration file for the md tools (mdadd and co). Its goal is to record a configuration for each md device the system should be configurated for.

Format

/etc/mdtab describe each md device, one per line, with the following syntax :

md_dev mode,c,f,crc32 dev1 dev2 ... devn

md_dev

md device (e.g. /dev/md0),

mode

one of linear, raid0 or raid1,

c

chunk factor (optional, not applicable to linear mode). Can also be set as nk where n is the chunk size in kilobytes,

f

maximum fault number (optional, not applicable to linear nor raid-0 mode),

crc32

optional control informations added by mdcreate. This is checked by mdadd and co when using the md device.

dev1 ...

real devices that are part of the md device.

Each section is separated by spaces or tabs. Note that there are no spaces in the option field.

Files

/etc/mdtab