Hi,
Mitchell Laks wrote:
Hi gurus,
A simple question. I have studied the documents
Software raid howto http://www.tldp.org/HOWTO/Boot+Root+Raid+LILO.html and scoured google.
Given a raid1 on a machine
/dev/md0 consists of /dev/hdc and /dev/hde.
I want to grab one of those disks and move it to a new machine and make it available there.
My experience: just put those drives in your new machine and it will run. Btw, I didn't use any /etc/raidtab configuration, it worked out of the box.
What I have thought about:
turn off machine. grab /dev/hde. put in new machine say at position /dev/hdc (for grins).
now take an identical copy of /etc/raidtab from the original machine. install it as /etc/raidtab modprobe raid1 mknod /dev/md0 b 9 0 (if necessary). raidstart /dev/md0
will this work?
My partitions were autodetect (fd) and after loading the raid-modules it worked fine...
questions:
1) when do i do mkraid /dev/md0 (ie what does that do... will it zap all the stuff in /dev/hdc => ie what was on old /dev/hde??)
yep.
2) what is the mysterious failed-disk parameter in /etc/raidtab used for - ie will it help here preserve the data while we start up the raid.
It's handy when you're moving from a normal disk to a raid-construction.
3) lets say i want to start the raid without a partner drive, ie just with /dev/hdc ( "drive that used to be known as /dev/hde" "my apologies to glyph who used to be Prince"), what do i do???
It starts with a failed disk.
Thanks, Mitchell
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