BES-53248 EFOSアップロードがFile transfer failed!で失敗する

SwitchへのEFOSアップロードに失敗する：

(switch_A_1)#copy ftp://netapp@X.X.X.X//EFOS/EFOS-3.4.4.6.stk backup

Remote Password:***

Mode........................................... FTP

Set Server IP.................................. X.X.X.X

Path........................................... //EFOS/

Filename....................................... EFOS-3.4.4.6.stk

Data Type...................................... Code

Destination Filename........................... backup

Management access will be blocked for the duration of the transfer

Are you sure you want to start? (y/n) y

FTP Code transfer starting...

File transfer failed!