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Can some recommend a backup solution for...?

Would some advise on a backup solution that they know works to solve the following scenario.

We have a backup server that receives online backups each evening from client sites.  The data is held on mirrored disks and has grown to almost 800GB’s.  We want a backup of the data to be stored on either a NAS or ESATA disk and the daily data to then also be saved to the disk, can someone recommend something they think would be suitable.  

Also, could you estimate how long it may take to write the initial backup to the backup device?

Thanks
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grsg
Asked:
grsg
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1 Solution
 
pjamCommented:
IMHO You need to be considering backing it up to something you can take off site in case of disater.  (Fire/earthquake/flood/tornado etc).  LTO4 Tape would work.
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grsgAuthor Commented:
Hi pjam, I  agree, something removable would be better.  Would LTO4 be faster than an app writing to ESATA?
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pjamCommented:
grsg,
I am currently backing up about the same amount to my disk array and weekly to LTO3 (SCSI external), but will upgrade to the LTO4 this Summer as data grows.
I use DPM 2007 to incremental back up three servers to MSA20 Array ever thirty minutes and then to the full to tape on Saturday. I don't back up the DC or the License Manager as the Dc is in a bigger forest.
I haven't timed it lately but I believe it is less than 3 hours for the tape.
ESATa would probably be faster, although you would need something like hot swap nd take the disk off site to be protected. Certainly doable.
I do a secondary backup to an ESATA external on my notebook of the DWG directory (AutoCAD & Solidworks drawings) using Karenware Replicator and it does about 150MB/sec. Not real speedy
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grsgAuthor Commented:
Thanks piam, looks like I need to look in to DPM and LTO4 or 5, thanks for your help, points on the way.
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pjamCommented:
Have a great day.  DPM 2010 requires a W2k8 64-bit server which we aren't ready for yet but it promises good stuff.
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