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result backup file not same with real file

Dear, 

i have running backup file in server, but result the backup not same with real file in server. 

file : 29GB

result backup : 16GB

 

why should i do? 

 

thank you

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1 Solution

Accepted Solutions
Accepted Solution!

... Then only the used blocks

... Then only the used blocks would be backed up, so you should be glad that it is working as expected

View solution in original post

8 Replies

...this might be due to

...this might be due to compression. Check that tape and see what sort of compression you are getting.

Thanks!

i backup to deduplication.

i backup to deduplication. not yet backup to tape. 

how can i check compression? because copression status "none".

...do you know how dedupe

...do you know how dedupe works? You then need to check the dedupe ratio you are getting as this is possibly why your backup size is a lot smaller.

The more a dedupe backup runs, the better the results, the better the dedupe ratio and the smaller the backups.

Thanks!

Is this disk thick or thin

Is this disk thick or thin provisioned? If it is the former, then only the used blocks would be backed up, resulting in less data

disk for destination backup

disk for destination backup storage or disk want to backup?

I am referring to the disk

I am referring to the disk that you are trying to backup

this disk thin.   

this disk thin. 

 

Accepted Solution!

... Then only the used blocks

... Then only the used blocks would be backed up, so you should be glad that it is working as expected

View solution in original post