<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class=""><br>
>>> That's a feature, not a bug. A backup/sync interval allows you to<br>
>>> correct for accidental deletion or overwrite. RAID does not.<br>
>><br>
>>> Eric<br>
>><br>
>> I do no understand your point. I'm not talking about features or bugs.<br>
<br>
> "That's a feature, not a bug" is a standard English jargon idiom.<br>
<br>
> <a href="http://www.jargon.net/jargonfile/f/feature.html" target="_blank">http://www.jargon.net/jargonfile/f/feature.html</a><br>
<br>
> What I mean is that the fact that a backup copy disk has a point in<br>
> time copy older than would have been on a raid mirror is often a good<br>
> thing, not something to be considered a defect.<br>
<br>
> Eric<br>
> _______________________________________________<br>
<br>
<br>
</div>Let me then simply state it are neither features nor bugs we're talking<br>
about. That to me is simply weird wording to confuse they issue.<br>
We're talking different philosophies for data loss prevention, which<br>
all have there pre's ant con's, which non of them anything to do with<br>
features or bugs.<br>
So unless you're speaking exclusively with British people, don't use<br>
confusing idiom.</blockquote><div><br></div><div>I understand your confusion... however that particular idiom (or similar) is EXTREMELY common in English speaking technology circles for a very long time. If you have never heard it before, take a moment to remember it as it will not be the last time you see it.</div>
<div><br></div><div>As far as the RAID / Backup argument... I have never seen literature on RAID that didn't include some sort of disclaimer about how RAID is not a substitute for backups. Most pro's would tell you that RAID's primary purpose is to prevent downtime, not dataloss. While in some extreme cases several layers of redundancy, including RAID, may be used to ensure the preservation of critical data (bank transactions for example), RAID will still run back ups at a regular interval.</div>
<div><br></div><div>Personally, I have a 3tb drive that I use rsnapshot to back up important data on... my backup drive sits in a firesafe, and I pull it out once a week, plug it into an external drive cradle and run my backup script. In the event my server is stolen, burned in a fire, wiped out by malicious hackers or a virus, or I get drunk and delete something important... I can recover the most important stuff, including my DB, all of my wife's recordings (in their own storage group so I can back them up without backing up kids shows, livetv, etc), and of course our pictures, home videos, tax returns, etc.</div>
<div><br></div><div>If the OP is trying to if RAID is right for him, I would ask him first how he will recover if he accidentally deletes /var, or if a pipe bursts and fries his entire array.</div></div></div></div>