You can perform an in-place restore of Informix database.
Before You Begin
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Full instance restore initiates salvage log backup that requires backup activity to be enabled at the destination instance level. 
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Enable backup activity control. To enable activity control, see Activity Control. 
Procedure
Perform Entire Instance or Whole System Restore with Salvage Log Backup
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From the CommCell Browser, navigate to Client Computers | <Client> | Informix. 
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Right-click the <Instance>, point to All Tasks and then click Browse and Restore. 
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Select Latest Backup. 
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Click View Content. 
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From the Browse window, select all the dbspaces, and click Recover All selected. 
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On the General tab of the Restore Options dialog box, perform the following: - 
Perform an entire instance restore, in the Restore Mode section, select either the Entire Instance Restore option or the Whole Restore option. 
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Select both the Physical and Logical check boxes. 
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Restore the emergency boot file (ixbar), oncfg and ONCONFIG files, select the Restore Emergency Boot File (ixbar) and Restore ONCONFIG File checkboxes. 
 
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Click OK. 
Perform Entire Instance or Whole System Restore without Salvage Log Backup
Important
To avoid salvage log backup, perform logical restore followed by physical restore.
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From the CommCell Browser, navigate to Client Computers | <Client> | Informix. 
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Right-click the <Instance>, point to All Tasks and then click Browse and Restore. 
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Select Latest Backup. 
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Click View Content. 
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From the Browse window, select all the dbspaces, and click Recover All selected. The Informix restore option dialog box opens. 
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On the General tab, perform the following actions: - 
To perform an instance restore, in the Restore Mode section, select either the Entire Instance Restore option or the Whole Restore option. 
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To perform physical restore, select the Physical check box. Note Select only Physical check box and deselect the Logical check box. 
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Restore the emergency boot file (ixbar), oncfg and ONCONFIG files, select the Restore Emergency Boot File (ixbar) and Restore ONCONFIG File checkboxes. 
 
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Click OK. 
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After successful completion of the physical restore, select all the dbspaces from the Browse window, and click Recover All selected. 
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From the Informix restore option dialog box, select the Logical checkbox. Note Select only Logical check box and deselect the Physical check box. 
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Click OK.