diff options
| -rw-r--r-- | Documentation/md.txt | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/Documentation/md.txt b/Documentation/md.txt index 203231307a26..3fb3b1ef18fb 100644 --- a/Documentation/md.txt +++ b/Documentation/md.txt @@ -2,6 +2,8 @@ Tools that manage md devices can be found at http://www.<country>.kernel.org/pub/linux/utils/raid/.... +Boot time assembly of RAID arrays +--------------------------------- You can boot with your md device with the following kernel command lines: @@ -11,6 +13,8 @@ for old raid arrays without persistent superblocks: for raid arrays with persistent superblocks md=<md device no.>,dev0,dev1,...,devn +or, to assemble a partitionable array: + md=d<md device no.>,dev0,dev1,...,devn md device no. = the number of the md device ... 0 means md0, @@ -34,7 +38,22 @@ A possible loadlin line (Harald Hoyer <HarryH@Royal.Net>) looks like this: e:\loadlin\loadlin e:\zimage root=/dev/md0 md=0,0,4,0,/dev/hdb2,/dev/hdc3 ro -------------------------------- + +Boot time autodetection of RAID arrays +-------------------------------------- + +When md is compiled into the kernel (not as module), partitions of +type 0xfd are scanned and automatically assembled into RAID arrays. +This autodetection may be suppressed with the kernel parameter +"raid=noautodetect". + +The kernel parameter "raid=partitionable" (or "raid=part") means +that all auto-detected arrays are assembled as partitionable. + + +Superblock formats +------------------ + The md driver can support a variety of different superblock formats. (It doesn't yet, but it can) @@ -82,7 +101,7 @@ array using HOT_REMOVE_DISK. Specific Rules that apply to format-0 super block arrays, and - arrays with no superblock (non-presistant). + arrays with no superblock (non-persistant). ------------------------------------------------------------- An array can be 'created' by describing the array (level, chunksize |