On Mon, Aug 13, 2007 at 09:31:45AM +0300, Yuriy Padlyak wrote: > Hi again, > > What is purpose of update-initramfs step? to update the initrd (initial ram disk) which is used to create a minimal environment to get the system booted. The initrd contains a small filesystem, appropriate modules for your hardware and some scripts and utilities to start up the system (raid utilities, for example). It also contains a copy of /etc/fstab and other configuration files that tell the system how to set itself up. If you initrd is not properly configured, your boot will fail, usually becaus the kernel can't find the real / to continue starting the system. A > > Andrew Sackville-West wrote: > >> assuming you have two available identical partitions to use for the >> RAID setup, the way *I* would _attempt_ this is to... 1) make sure I have >> a grub disk available in case I blow it and can't >> boot... >> 2) create the RAID1 array using the two partitions. >> 3) migrate my /boot to that new array >> 4) fix up my /etc/fstab to point to it >> 5) fix-up my /boot/grub/menu.lst entries to point to the right devices >> 6) update-initramfs 7) reboot and pray. this procedure was tested by me >> several months ago, but I don't >> remember it exactly, so you are suitable warned... if you are already >> booting to a / on some combination of LVM and RAID, >> then that's really the hard part. Its pretty straightforward to get >> /boot onto its own RAID1. You can manually install grub onto each disk >> that holds the partitions in your /boot array so that if a disk fails, >> you can still boot... please study up on this before attempting as you >> don't want to blow >> it. >> A >> oh, an alternate procedure might be to go ahead and just make a fs on >> one of the partitions, migrate /boot and get that working, then make >> that partition into a degraded array (missing disks) and make sure it >> boots fromthere and then finally add the second (or more disks) to the >> degraded array and then it will mirror and be operational. >
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