Emergency Mode Help Needed

[RockingHorse]

I have an old LS-WTGL R1 which recently suffered a hard drive failure. I replaced the drive and all appeared well the NAS fired reported raid was rebuilding (raid 1) and ultimately all appeared well and access to the files therein obtained. The following day I started to get messages indicating that the older drive was failing. The NAS eventually reported Emergency Mode in NAS Navigator and although I could see the presence of the drive, I could not access its contents. NAS navigator was showing an IP address of 169.254.32.248 and a subnet mask of 255.255.0.0 both of which were not within the range of my network. I tried updating the firmware, the updater reported no drive found. I connected the drive directly to my PC and changed the IP address to a static one - no change. I tried changing the range on my router to match that of the NAS- no change. Factory reset achieved nothing except I cannot see NAS at all now. Light displays are top - flashing blue, centre - flashing red 6 times, bottom - green -flashing as if to indicate disk activity. I took both drive out and installed them in a USB caddy attached to a PC running ubuntu. I was able to run a disk checker and saw the older drive was showing errors but still readable. Both drives appeared formatted and partitioned correctly.
I would like to try and fix this NAS and am looking for suggestions for a possible cure. Would installing another new drive restore things as the firmware would no longer see a damaged drive or shall I just throw it in the pond?

[davo]

The boot image is corrupt and needs to be reinstalled. Is the data needed?

[RockingHorse]

No, I have the data backed up on another NAS. Will the boot image be corrupt on both drives ? As this was raid , I am assuming the same data is on both drives or is that not the case?

[RockingHorse]

Thanks for the help Davo, the NAS is now back up and running, didn't actually take that long once I had the files, so it obviously was the boot image that needed fixing.