Cannot access SAN IBM StorWize V3700 after power cut.

I have got an IBM SAN StorWize V3700 which is having the following issues after a power cut:

1. I cannot ping the IP

2. No activity on the disks

3. My servers cannot see the LUNs

I tried the following but nothing worked:

1. Reboot the SAN

2. Ping the default IP - no response

3. Insert FAT32 pen drive with satask.txt - no files created

There seems to be no response at all from the SAN.

Thanks for your support.