linux-old/Documentation/md.txt
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   1Tools that manage md devices can be found at sweet-smoke.ufr-info-p7.ibp.fr
   2in public/Linux/md035.tar.gz.
   3
   4        Marc ZYNGIER <zyngier@ufr-info-p7.ibp.fr>
   5
   6--
   7
   8You can boot (if you selected boot support in the configuration) with your md 
   9device with the following kernel command line:
  10
  11md=<md device no.>,<raid level>,<chunk size factor>,<fault level>,dev0,dev1,...,devn
  12
  13md device no. = the number of the md device ... 
  14              0 means md0, 
  15              1 md1,
  16              2 md2,
  17              3 md3,
  18              4 md4
  19
  20raid level = -1 linear mode
  21              0 striped mode
  22              other modes are currently unsupported.
  23
  24chunk size factor = (raid-0 and raid-1 only)
  25              Set  the chunk size as PAGE_SIZE << n.
  26              
  27fault level = (raid-1 only)
  28              Set  the maximum fault number as n.
  29              Currently unsupported due to lack of boot support for raid1.
  30                            
  31dev0-devn: e.g. /dev/hda1,/dev/hdc1,/dev/sda1,/dev/sdb1
  32                            
  33my loadlin line looks like this:
  34
  35e:\loadlin\loadlin e:\zimage root=/dev/md0 md=0,0,4,0,/dev/hdb2,/dev/hdc3 ro
  36                            
  37        Harald Hoyer <HarryH@Royal.Net>
  38
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