Re: Creating RAID 1+0 with LVM

From: Darren Dunham (ddunham_at_redwood.taos.com)
Date: 08/02/05 

Date: Tue, 02 Aug 2005 00:12:42 GMT

Neil Truby <neil.truby@ardenta.com> wrote:
>>> Obviously I'm missing something ...
>>
>> While the configuration syntax is 0+1, LVM actually creates 1+0 RAIDs.
>> But don't believe me; you can easily test this.
>>
>> -frank

> I do believe you ... but how can I test it? :-)

Pull a disk. Watch that writes still hit both sides of the mirror where
it remains redundant. Reconnect the disk and see that the resync is
only for the slice with that disk, not the others.

Here's some more stuff from Andre Molyneux's blog. It's a further
explanation.
http://blogs.sun.com/roller/page/andresblog/20050614#raid_0_1_vs_raid 

-- 
Darren Dunham                                           ddunham@taos.com
Senior Technical Consultant         TAOS            http://www.taos.com/
Got some Dr Pepper?                           San Francisco, CA bay area
         < This line left intentionally blank to confuse you. >

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