Falsh write in progress, cant save the configuration. [ Getting error In WLC 2504]

[vinoth.R1@ge.com]

I have 2504 WLC which configured High availability. i was trying to upload IOS image from TFTP server , now more than 10 hours over still its in progress. 1. If i try with " RESET SYSTEM FORCED" existing configuration will erase from WLC ? 2. And if I on and off controller , again the problem exists.   Kindly share any suggestion, i could be helpful to fix the issue....

[Scott Fella]

Make sure you are following the upgrade path. You can always try a different t method to upload the image also.

[vinoth.R1@ge.com]

I have followed this steps

transfer download datatype code
transfer download mode tftp
transfer download serverip XXXXXXXX
transfer download path .
transfer download filename XXXXXXXX
transfer download username XXXXX
transfer download password XXXXX
transfer download start

Via CLI , now more than 24 hours over , still its says 

(Cisco Controller) >transfer upload path .

Request failed, Transfer already in progress

[Scott Fella]

You are following the upgrade path? Don’t jump to a new. Ode without making sure you can go straight to that code. Use FTP or http for the upload.

[Scott Fella]

Unplug the controller. 

[vinoth.R1@ge.com]

if I unplug the controller existing configuration will ego off ?  Devices involved in production ...network.

so Any other to recover the WLC from this issue..

[Scott Fella]

Going for that long, no. You have to reboot the wlc anyways even after an upgrade.