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LTO-2 Drive Only Backing up 300gb, used to backup more (upto 400gb)

 
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New Member

LTO-2 Drive Only Backing up 300gb, used to backup more (upto 400gb)

Hello,

At the new place I have just started at they have a server with an HP StorageWorks Ultrium 448 200/400GB Rackmount Tape Drive which takes LTO-2 tapes. Now the data on the server to be backed up is 350GB.

Whenever I try to do a full backup it will only backup 300gb on one tape then it will ask me for another to complete the backup. Its as if the compression has got lower. Whenever I try to do a backup of 300gb the backup works fine.

Apparently the backup used to backup 350gb to one tape.

Should i be able to backup up 350GB to an LTO-2 tape? Hope this is possible as I dont want to be buying more LTO-2 tapes so each nightly backup has to have 2 tapes and needing someone to wait till the backup on one tape is finished before the next is put in.

How long should 350gb take to back up?


1 REPLY 1
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Frequent Advisor

Re: LTO-2 Drive Only Backing up 300gb, used to backup more (upto 400gb)

HI Leon

I agree that LTO @ tapes can backup data upto 400 GB but not all data can be compressed from 400GB to 200 GB for more reference please look at the compression table below


CAD 3:8:1
Spreadsheet/word processing 2:5:1
Typical file/print server 2:0:1
Lotus Notes databases 1:6:1
Microsoft Exchange/SQL Server databases 1:4:1
Oracle/SAP databases 1:2:1
Source Page # 73 http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00775232/c00775232.pdf
I work for HP