MSA1000 firmware bad

[tekskin]

We have an MSA1000, with 2 controllers and 2/8 Fabric Switch.

Had to have the controllers replaced as they were faulty, but now we are experiencing an issue with upgrading the firmware, getting the following error messages:-

SAN1-switch1:admin> firmwaredownload
Server Name or IP Address [host]: xxx.xxx.xxx.xxx (edited out)
User Name [user]: anonymous
File Name [/usr/switch/firmware]: v3.1.3a
Protocol (RSHD or FTP) [rshd]: ftp
Password:
110336+6408+131212, csum 74cb
.........................................
DO NOT power cycle the switch!
writing flash 0 .........................................
writing flash 1 .........................................
download complete
SAN1-switch1:admin> fastboot
0x102d4780 (tShell): Dec 20 10:39:54
WARNING FLASH-BAD_FIRMWARE1, 3, Firmware in flash 1 at 0x40000 is corrupted

0x102d4780 (tShell): Dec 20 10:39:54
WARNING FLASH-BAD_MIRROR, 3, Recovered 1 from 0: 5314412 bytes at 0x40000

.........................................
Rebooting...

Any ideas anyone? We have re-downloaded this firmware 3 times to make sure it is not corrupted.

Kevin