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On Thu 29 Sep 2011 05:02:40 PM IST, Florian Philipp wrote: |
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> Am 29.09.2011 11:00, schrieb Adam Carter: |
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>> Sanity check please gurus :) |
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>> I've installed the new disks, partitioned them and created the md |
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>> devices, which are now syncing. The kernel already has all the modules |
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>> built in. I believe the next steps are; |
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>> 1 mkfs the md devices |
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>> 2 copy the partitions from the current disk to the mirror |
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>> 3 edit fstab on the mirror |
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>> 4 install mbr on both submirror disks |
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>> 5 halt the box |
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>> 6 set the bios boot order to the two sub mirrors |
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>> 7 boot from mirror |
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>> |
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>> Is that incorrect or incomplete? Do I need to be concerned about disk |
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>> devices being renamed when the original disk is removed? |
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>> |
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> |
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> Is /boot a partition on top of the md device? If it is, you should make |
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> sure to use the --metadata=0.90 when creating the md devices. If it is a |
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> separate md device, this should not be necessary. |
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> |
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> If you run into issues concerning the renaming, you can try to specify |
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> the md devices explicitly with the kernel parameter 'raid=noautodetect |
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> md=0,/dev/sda1,/dev/sdb1' |
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> |
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> Regards, |
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> Florian Philipp |
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> |
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|
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A big thing I learnt while configuring raid on a new server (well, you |
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can't see the kernel boot up messages, so one single misconfiguration |
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and it's a nightmare!) with Gentoo. |
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What I did was, disabled kernel based automatic raid detection and |
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didn't add an initrd with the required modules (md ones). |
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So, make sure that raid support and automatic detection and any other |
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disk related modules are compiled right into the kernel. In fact, I |
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prefer w/o any initrd, all critical stuff right into the kernel. |
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-- |
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Nilesh Govindarajan |
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http://nileshgr.com |
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