Data backup operation that is higher-grade in NAS of ELECOM

Method of backup

  • Data integrity
  • Very high
  • High
  • Very high

The ELECOM LinuxNAS Backup-adaptive situation

  • NSB-6S/MS series
  • High
  • High
  • High
  • High
  • NSB-3MS/3NR series
  • High
  • High
  • Very high
  • Very high

What is type in the same period of backup?

In NAS of ELECOM, it supports various backup methods (synchronization type).
As there are merit, demerit every each type, please choose the most suitable method depending on used environment.

We are backed up by synchronization

We completely make main plane and backup machine agree.
When backup is carried out, deletion or added file deletes with backup machine or we are added.

Merit
  • When backup is carried out, main plane and backup machine become the same state, and restoration is easy.
  • Other synchronization has less backup capacity than type and finish.
Demerit
  • We cannot take they data with backup machine after backup was carried out after putting out with main machine by mistake, and having overwritten.
For backup
Necessary capacity
Low capacity
  • Main plane data
    Backup former data
  •  
  • Backup machine data
    Backup data
  •  
  • We can take out at the time of the fourth
    Backup data
    Backup data to be able to take out at the time of the fourth
Incremental backup

When backup is carried out, we make main plane and backup machine agree and maintain all old file.
Deleted file is held in Backup.

Merit
  • Even if backup is carried out after having deleted data from main plane by mistake, we are reliable as original data remain to backup machine.
Demerit
  • As data of backup machine are not deleted even if they delete unnecessary data of main plane, capacity increases.
  • When backup is carried out after it was overwritten, we cannot take out data before overwrite.
  • Because it is restored including data which we deleted in main plane in the case of restoration, correspondence such as deletion is necessary.
For backup
Necessary capacity
Middle capacity
  • Main plane data
    Backup former data
  •  
  • Backup machine data
    Backup data
  •  
  • We can take out at the time of the fourth
    Backup data
    Backup data to be able to take out at the time of the fourth
History backup

Whenever backup is carried out like TimeMachine and snapshot, we come to be able to refer to backup of the point in time each.
Therefore we sail up history and can take out data. (for up to 100 times)
※It is function of only at the time of schedule backup of local backup.

Merit
  • We can refer to state at the time of option that backup was carried out.
Demerit
  • History backup is available only at the time of local backup.
  • You cannot use history backup in remote backup and Amazon S3.
  • Capacity of backup becomes bigger than other types.
For backup
Necessary capacity
Large capacity!
  • Main plane data
    Backup former data
  •  
  • Backup machine data
    Backup data
  •  
  • We can take out at the time of the fourth
    Backup data
    Backup data to be able to take out at the time of the fourth

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