Solved

Tape management strategy in large backup set

Posted on 2010-09-02
6
715 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
  • 3
  • 2
6 Comments
 
LVL 16

Accepted Solution

by:
Malmensa 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
How to improve team productivity

Quip adds documents, spreadsheets, and tasklists to your Slack experience
- Elevate ideas to Quip docs
- Share Quip docs in Slack
- Get notified of changes to your docs
- Available on iOS/Android/Desktop/Web
- Online/Offline

 
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

What Is Threat Intelligence?

Threat intelligence is often discussed, but rarely understood. Starting with a precise definition, along with clear business goals, is essential.

Join & Write a Comment

How to fix error ""Failed to validate the vCentre certificate. Either install or verify the certificate by using the vSphere Data Protection Configuration utility" when you are trying to connect to VDP instance from Vcenter.
A quick step-by-step overview of installing and configuring Carbonite Server Backup.
To efficiently enable the rotation of USB drives for backups, storage pools need to be created. This way no matter which USB drive is installed, the backups will successfully write without any administrative intervention. Multiple USB devices need t…
This tutorial will walk an individual through setting the global and backup job media overwrite and protection periods in Backup Exec 2012. Log onto the Backup Exec Central Administration Server. Examine the services. If all or most of them are stop…

747 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

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now