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result backup file not same with real file

RIDHO07
Level 4

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 ACCEPTED SOLUTION

Accepted Solutions

pkh
Moderator
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... 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 8

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

Thanks!

RIDHO07
Level 4

i backup to deduplication. not yet backup to tape. 

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

CraigV
Moderator
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...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!

pkh
Moderator
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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

RIDHO07
Level 4

disk for destination backup storage or disk want to backup?

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

RIDHO07
Level 4

this disk thin. 

 

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