s it possible for yo to try uploading file to TFTP server & then importing it on controller.
Aruba# copy tftp <ip-address of tftp server> <name of file > flash: flashbackup.tar.gz.
I beleive we can not copy file to flash using FTP.
We can use TFTP or SCP server for the same.
copy tftp: <tftphost> <srcfilename> flash: flashbackup.tar.gz
copy scp: <scphost> <username> <srcfilename> flash: flashbackup.tar.gz
FTP only allowd you to copy a file to a partition & not to flash.
Eg:
FTP:
(Primary) #copy ftp: 1.1.1.1 admin flashbackup ?
system: System Partition
TFTP:
(Primary) #copy tftp: 1.1.1.1 flashbackup ?
flash: Copy to the flash file system
system: System Partition