diff options
Diffstat (limited to 'mdadm.8')
| -rw-r--r-- | mdadm.8 | 70 |
1 files changed, 7 insertions, 63 deletions
@@ -36,7 +36,8 @@ Recent kernels (2002) also support a mode known as does not support MULTIPATH as yet. .B mdadm -is a program that can be used to create and manage MD devices. As +is a program that can be used to create, manage, and monitor +MD devices. As such it provides a similar set of functionality to the .B raidtools packages. @@ -479,69 +480,12 @@ This file is not currently used by .SS /etc/mdadm.conf -The config file is line oriented with, as usual, blank lines and lines -beginning with a hash (or pound sign or sharp or number sign, -whichever you like to call it) ignored. -Lines that start with a blank are treated as continuations of the -previous line (I don't like trailing slashes). +The config file lists which devices may be scanned to see if +they contain MD super block, and gives identifying information +(e.g. UUID) about known MD arrays. See +.BR mdadm.conf (5) +for more details. -Each line contains a sequence of space-separated words, the first of -which identified the type of line. Keywords are case-insensitive, and -the first work on a line can be abbreviated to 3 letters. - -There are two types of lines. ARRAY and DEVICE. - -The DEVICE lines usually come first. All remaining words on the line -are treated as names of devices, possibly containing wild cards (see -.IR glob (7)). -These list all the devices that -.B mdadm -is allowed to scan -when looking for devices with RAID superblocks. -Each line can contain multiple device names, and there can be multiple -DEVICE lines. For example: -.IP -DEVICE /dev/hda* /dev/hdc* -.br -DEV /dev/sd* -.br -DEVICE /dev/discs/disc*/disc -.PP -The ARRAY lines identify actual arrays. The second word on the line -should be the name of the device where the array is normally -assembled, such as /dev/md1. -Subsequent words identify the array. If multiple identities are given, -then the array much match ALL identities to be considered a match. -Each identity word has a tag, and equals sign, and some value. -The options are: - -.TP -.B uuid= -The value should be a 128 bit uuid in hexadecimal, with punctuation -interspersed if desired. This must match the uuid stored in the -superblock. -.TP -.B super-minor= -The value is an integer which indicates the minor number that was -stored in the superblock when the array was created. When an array is -created as /dev/mdX, then the minor number X is stored. -.TP -.B devices= -The value is a comma separated list of device names. Precisely these -devices will be used to assemble the array. Note that the devices -listed there must also be listed on a DEVICE line. -.TP -.B level= -The value is a raid level. This is normally used to identify an -array, but is supported so that the output of -.B "mdadm --examine --scan" -can be use directly in the configuration file. -.TP -.B disks= -The value is the number of disks in a complete active array. As with -.B level= -this is mainly for compatibility with the output of -.BR "mdadm --examine --scan" . .SH TODO |