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Re: no backup? said by RARPSL:Some RAID configurations can be set as backups. The way it works is that the configuration of duplicates is such that the data is recorded 3 times (on 3 separate drives in the RAID complex). You disconnect the drives that comprise one full image from the RAID Complex and access it as separate image for your backup run [ie: It is a snapshot as-of the time of disconnect]). that's just one method (and these days, one of the more costly/wasteful methods). plus, you only have one fallback position so what interval do you take it? hourly? daily? the RPO/RTO demands will dictate this period, along with the capabilities of the technology used.
honest-to-god snapshotting (say, netapp's snapshot or emc timefinder/snap) can do this kind of thing better.. but it's more technical, depends on a lot more pieces working correctly and has its own impacts on response/service levels.
if i had to bet money, charter does back this up. the failure simply happened in the window between backups, the loss was irrevocable. think what happens when your backups run at 8PM and your disk fails 7:59PM. life sucks. any company faces this risk. it simply depends on how much value is placed on the data and the risk if data is lost. being email, the value is low and the risk is negligible. | |
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