Solved

Tape management strategy in large backup set

Posted on 2010-09-02
6
733 Views
Last Modified: 2013-12-01
Hi All,

I've got LTO-4 tape drive and using BE 2010 R2 running now, in my backup job I've selected a directory which contains 1.1 TB of files that is a backup file from a 3rd party application (already deduplicated), however after long writing time i found out that the LTO-4 tape 1.6 TB is not enough ? it asked for another tape ?

since the difference is not that big, then i insert the LTO-3 tape. would that be ok for the weekly full archive to tape ?
using 2 tape in one backup set ? LTO-4 and LTO-3 pair ?

any kind of help and suggestion would be greatly appreciated.

Cheers,
JJ
0
Comment
Question by:jjoz
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
6 Comments
 
LVL 19

Accepted Solution

by:
Mal Osborne earned 167 total points
ID: 33593347
An LTO-4 tape is 800Gb, 1.6 is assuming a 2:1 compression ratio. In reality, 2:1 is optimistic, 1.6:1 is a better figure to work with, however in this case the data is almost certainly already compressed.  An LTO-4 & an LTO-3 tape have a combined capacity of 800 + 400 Gb = 1.2Tb, so you should be able to fit 1.1Tb on them, but only just.

0
 
LVL 1

Author Comment

by:jjoz
ID: 33593350
ah yes... thanks for the explanation man...
0
 
LVL 22

Assisted Solution

by:dovidmichel
dovidmichel earned 333 total points
ID: 33621011
Only same type of tapes should be used in a backup set, so only LTO4 or only LTO3 in the same set.
0
Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

 
LVL 1

Author Comment

by:jjoz
ID: 33623208
ah.. but the problem is taht i don't have enough LTO-4, is there any problem in doing so ?
0
 
LVL 22

Assisted Solution

by:dovidmichel
dovidmichel earned 333 total points
ID: 33629793
Again you should not mix tapes. Just buy more LTO4 tapes!
Here is a place that has them for $30.
http://www.lenscomputers.com/lto4ulta8.html?gclid=COvWiJS1-KMCFeh25QodKlCpLA
0
 
LVL 1

Author Closing Comment

by:jjoz
ID: 33635867
thanks ma n!
0

Featured Post

Get your Disaster Recovery as a Service basics

Disaster Recovery as a Service is one go-to solution that revolutionizes DR planning. Implementing DRaaS could be an efficient process, easily accessible to non-DR experts. Learn about monitoring, testing, executing failovers and failbacks to ensure a "healthy" DR environment.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

VM backup deduplication is a method of reducing the amount of storage space needed to save VM backups. In most organizations, VMs contain many duplicate copies of data, such as VMs deployed from the same template, VMs with the same OS, or VMs that h…
The business world is becoming increasingly integrated with tech. It’s not just for a select few anymore — but what about if you have a small business? It may be easier than you think to integrate technology into your small business, and it’s likely…
This tutorial will walk an individual through the process of installing the necessary services and then configuring a Windows Server 2012 system as an iSCSI target. To install the necessary roles, go to Server Manager, and select Add Roles and Featu…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question