On Sat, Sep 18, 2010 at 7:22 PM, Sam Varshavchik <mrsam@xxxxxxxxxxxxxxx> wrote: > I just did a fresh F13 install on a server with a softraid setup that's > similar to a setup on a different existing server. The other server was > upgraded to F13, this one is a fresh install. Both servers, raid-wise, look > the same: two disks with RAID1 ext3 partitions. > > This is the mouthful that Anaconda dumped into menu.lst on an F13 fresh > install: > > kernel /vmlinuz-2.6.33.3-85.fc13.x86_64 ro > root=UUID=a9b80e40-3a79-4522-b8a8-ecb3960720b4 > rd_MD_UUID=b0cb9b26:be362a98:012cdf18:19de5ac1 > rd_MD_UUID=067004a2:11daf9c2:0cedca66:ac63c62d rd_NO_LUKS rd_NO_LVM rd_NO_DM > LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet > > When, previously, Anaconda updated the other server from F12 to F13, it did > not write any of the above rd_* parameters, just root=, and that's it. > > It's fairly obvious that rd_NO* says that I do not use the similarly-named > facilities, but I'm wondering what exactly happens by specifying these > parameters. The other server does not use LUKS, LVM, or DM also, but it > manages to boot just fine without these boot options. > > I'm not positive what rd_MD_UUID does, I'm guessing that this specifies in > which order /dev/md minor numbers should be assigned to the various software > volumes, by the kernel, at boot. This is obviously a good thing, keeps > /dev/md? from jumping around unexpectedly, for some reason, but why did > Anaconda did not do the same thing when I updated the other existing server > to F13? I've never found any documentation about the rd_* stuff but if you look at the scripts in initramfs* you will find that the rd_* options help the initrd enable and disable various disk properties - I assume to speed up boot. The rd_MD_UUID entries ensure that udev creates the mds whose constituent disks have that uuid. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
