[ale] ATL Colocation and file server suggestions

[Jim Kinney]

2009/1/20 Michael H. Warfield <mhw at wittsend.com>:
> On Tue, 2009-01-20 at 14:15 -0500, Jeff Lightner wrote:
>> Backups?  We don't need no stinkin' backups.
>
>        Just as a reminder...  If it isn't obvious...
>
>        Raid* / Mirror != Backup !!!!
>
>        Why Mirroring Is Not a Backup Solution
>        http://journalspace.com/this_is_the_way_the_world_ends/not_with_a_bang_but_a_whimper.html
>
>        Appears that Journalspace had their database wiped at a high level so
> their mirrors were useless as a backup.
>
>        They relied on Raid as a backup solution and they are no more.


Yes! RAID is a guarantee that all filesystem fsck-ups occur on all
drives at once thus making that new screw-up the default data set.
>
>> J
>
>        Mike
>
>>
>> ______________________________________________________________________
>> From:ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Ken
>> Ratliff
>> Sent: Tuesday, January 20, 2009 1:57 PM
>> To: ale at ale.org
>> Subject: Re: [ale] ATL Colocation and file server suggestions
>>
>>
>>
>>
>>
>>
>> On Jan 20, 2009, at 1:26 PM, Jeff Lightner wrote:
>>
>>
>>
>>
>> With RAID5 you're still at risk from losing 2 drives and moreover it
>> is ANY 2 drives.  At least with RAID10 you have to lose 2 specific
>> drives at the same time.  You save nothing but space with RAID5
>> configuration and your risk increases.
>>
>>
>>
>>
>>
>> Oh, I know and I agree. Unfortunately, I've won the lottery with
>> RAID10 enough that the once bitten, twice shy rule now applies. No
>> matter what RAID configuration you're in, you're at risk. Thank god
>> for dedicated backup servers.
>>
>>
>>
>>
>>
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> --
> Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
>   /\/\|=mhw=|\/\/          | (678) 463-0932 |  http://www.wittsend.com/mhw/
>   NIC whois: MHW9          | An optimist believes we live in the best of all
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>
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-- 
-- 
James P. Kinney III