[CentOS] Re: Software RAID: on same IDE port or on different ones?

Scott Silva ssilva at sgvwater.com
Mon Oct 22 17:10:58 UTC 2007

on 10/22/2007 7:32 AM Kai Schaetzl spake the following:
> Scott Silva wrote on Thu, 18 Oct 2007 16:05:09 -0700:
>> As long as the partitions were raid-autostart (fd I believe) it should pick it up.
> Yeah, it wasn't a problem at all.
>> Having a CDrom on a channel shouldn't be a problem as long as the drive 
>> supports UDMA, which I think the modern drives support.
>> And losing the CD along with the failed drive is not a big deal.
> No CDROM, anyway :-)
>> You still need to reboot to replace the failed drive, but the system should 
>> run until you get there. Think about also putting your swap on raid if the box 
>> swaps occasionally.
> Yeah, I thought about that before partitioning and first wanted to exclude swap. 
> Obviously, this wouldn't be a problem when a disk goes away on booting, but if it is 
> in the middle of operation and there's just a few data that a program needs urgently 
> .. I'm using a simple scheme now. There are only two partitions, one holds boot and 
> one holds LVM with /, /tmp, /var and swap.
If your swap is on LVM, and LVM is on a raid 1 array, then effectively your 
swap is on raid, so no worries.
> I also installed grub to both drives and since I couldn't find my old information 
> how to do that I googled again for it and found that the page with the information 
> doesn't exist anymore. A *lot* of sites point to it, so this is a real pita. I found 
> it finally via archive.org. I wonder if it shouldn't get included in original text 
> in the wiki and the FAQ better point to that? (You can't link directly to the page 
> at archive.org and one can't be sure that it will stay available there.)
> http://www.centos.org/modules/smartfaq/faq.php?faqid=47
> (the last link)
> Kai

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