Subject: Re: RAIDframe questions
To: Chris Ross <firstname.lastname@example.org>
From: Brian Buhrow <email@example.com>
Date: 09/19/2007 14:44:49
Hello Chris. You want to swap on raid0b, which you've labeled with a
raid specific label, but have a b partition on each component disk because
you are correct that crash dumps cannot be written to swap partitions on
raided disks. Alternatively, if you don't care about that, don't worry
about the b partitions on the component disks.
In addition to the documentation you sighted for raidframe setup, read
the raidctl(8) man page. It's pretty complete in terms of instructions to
follow in various scenarios.
On Sep 19, 4:10pm, Chris Ross wrote:
} Subject: Re: RAIDframe questions
} On Sep 19, 2007, at 14:20, Geert Hendrickx wrote:
} > IF you have swap configured on the RAID, you must either use
} > shutdown(8) or
} > unconfigure the swap manually before running halt/reboot(8).
} > Otherwise the
} > RAID set will be dirty after reboot. I used to alias halt/reboot
} > to "echo
} > Please use shutdown(8) instead" or something like that. But I've
} > just made
} > it a proper habit to always use shutdown (except when in single
} > user mode).
} Okay. So what are the options for dealing with swap?
} a) Have swap on sd0b or sd1b
} This means it will be "bad" if that disk fails, and I want the
} system to keep
} running. It'll not run at all, right?
} b) Have swap on raid0b
} This means the above issue is in effect, but swapping will work if one
} of the disks fails, and the RAID is running in degraded mode, right?
} There are issues with (b) where it suggests you put a 'b'
} partition on the
} underlying disks. Is this for the crash-dump code? Can crash-dumps not
} happen to a raid device? I guess I need to re-read the aforementioned
} document to check, but any comments from those who've been here
} before would be welcomed. Thanks!
} - Chris
>-- End of excerpt from Chris Ross