On Apr 27, 2012, at 10:58 AM, Bob Hoffman wrote:
> On 4/27/2012 10:52 AM, aurfalien wrote:
>> Hi all,
>>
>> Please excuse the many posts.
>>
>> Wondering if any one can help me with the the setup.
>>
>> I have 2x2TBdisks.
>> I would like to mirror them.
>> I would like to create two LVMs so that I can snap shot from one to the other.
>>
>> During Centos 6 install, how would I go about this as its confusing?
>>
>> So far I am here;
>>
>> 1) Created the following raid devices;
>> md0 500MB (use it for /boot)
>> md1 4000MB (use it for swap)
>> md2 All remaining space (use it for /)
>>
>> 2) Created two physical LVMs, one on md0, the other on md1.
>>
>> 3) ?
>> This is were I am confused, do I create two LVM volume groups?
>>
>> I was thinking that my primary LVM can be ~1TB and that my other LVM which I snapshot to can also be ~1TB.
>>
>> Anyways, I am very green on this topic as I usually do hardware raids but I don't have that option.
>>
>> Thanks in advance,
>> - aurf
>>
> md0, your boot, cannot be a physical volum...so don't add things to it...
> md1 and md2 can be merged, make instead md1 with all remaining space.
> create a raid partition on each drive with 'remaining space' (making
> sure both are the same size)
> then create a physical volume raid device and select each drive that has
> the big raid partition
>
> then select create volume group...
> add /swap and '/' to as mount points, these will be volume groups.
> there is a drop down when adding a mount point that determines file
> type, one is 'swap'
>
> you only need one group..
>
> the physical volume holds the logical group, which holds the logical
> volumes.
Wow, I think I did it.
Re read your reply a few times and yea, nice man.
Thanks much for the reply.
Did three LVMs;
/ ~1TB
swap ~4GB
/snapshot ~900GB
Very very cool.
- aurf
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