[CentOS] preferred software RAID 10?
Rudi at SoftDux.com
Sat Jul 26 10:19:14 UTC 2008
Ross S. W. Walker wrote:
> Kai Schaetzl wrote:
>> Rudi Ahlers wrote on Thu, 17 Jul 2008 23:10:48 +0200:
>>>> /boot shouldn't be mirrored, as the BIOS won't know how to boot it.
>>>> leave /dev/sdb1 the same size as /dev/sda1 and call it /boot2 and try
>>>> to remember to copy /boot to /boot2 each time you update the kernel.
>>> I understand this, but how do you boot from /boot2 on the second HDD if
>>> the 1st have failed?
>> You don't (*). I don't understand John's advice here. There is no problem
>> md mirroring /boot. You just need to install grub a second time on the
>> other disk. For that you have to boot from it. (I think I also did it
>> successfully without booting from the other disk in the past, but last
>> time I tried it it didn't want to work like I remembered it should.)
>> (*) Anyway, you would boot from a Rescue CD or such and rename it ...
> Yes, no problems, I had /boot mirrored across 4 drives (NAS box) and
> grub installed on each.
> If you use labels for /boot in fstab you don't even need to edit fstab
> from a rescue CD, just remove the failed first drive and boot.
Can you please explain this to me?
I've never used labels before, so if you could maybe show me a sample of
how it's setup?
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