Updating techniques for memory of a chassis management module

Abstract

A technique for data roll-back includes in response to a first external static memory device being coupled to a first chassis management module and the first chassis management module being coupled to a middle plane board, determining whether the first external static memory device operates normally. In response to the first external static memory device operating normally, a controller of the first chassis management module writes data in the first external static memory device into a non-volatile memory of the first chassis management module to perform data roll-back.

What is claimed is: 
     
         1 . A method of data roll-back, comprising:
 in response to a first external static memory device being coupled to a first chassis management module and the first chassis management module being coupled to a middle plane board, determining, by the first chassis management module, whether the first external static memory device operates normally; and   in response to the first external static memory device operating normally, writing, by a controller of the first chassis management module, data in the first external static memory device into a non-volatile memory of the first chassis management module to perform data roll-back.   
     
     
         2 . The method of  claim 1 , further comprising:
 in response to the first external static memory device being removed from the first chassis management module and coupled to a second chassis management module that is coupled to the middle plane board, storing, using a controller of the second chassis management module, roll-back data that is stored in the first external static memory device to a non-volatile memory of the second chassis management module.   
     
     
         3 . The method of  claim 1 , wherein whether the first chassis management module operates normally is indicated by an indicator of the first chassis management module. 
     
     
         4 . The method of  claim 1 , further comprising:
 sending, from the first chassis management module, a message indicating an abnormal operation of the first external static memory device in response to the abnormal operation of the first external static memory device.   
     
     
         5 . The method of  claim 1 , wherein an update of data related to components in a chassis is stored in a second external static memory device in response to removal of the first external static memory device from the first chassis management module and the insertion of the second external static memory device into the first chassis management module. 
     
     
         6 . The method of  claim 1 , wherein an update of data related to components in the chassis is stored in the first external static memory device in response to the insertion of the first external static memory device into the first chassis management module.