The blinking pattern should consist of a number of blinks followed by a pause and then the pattern repeated. The number of blinks indicates the error type (as indicated in the "Troubleshooting" section of the manual. If it is 4 blinks then that indicates a potential fan problem - so you might want to check that the fan is spinning. A flash problem is indicated by 5 blinks (although other things can also cause 5 blinks to happen).
The fact that you can get as far as seeing the TS in the client utility suggests that the flash is OK, as to get that far the system must have booted linux from the flash and have been trying to switch to running the system from the hard disks.
Config information is held in both flash and on the hard disk. The flash copy is used to preserve settings while updating firmware and the disk copy is used during normal running.
Changing the disk cage between systems is unlikely to work in this case as it sounds as if the problem is with the disk contents - not the flash.
Are these all PPC based Terastations (the instructions below assume this)? If so then as you have access to multiple terastations my suggestion would be to proceed as follows:
- remove each disk in turn and attach it via external USB box to existing terastation
- mount partition 1 of each disk
- change to the mounted partition
- do a 'rm -r *' command to recursively remove all files. Make sure you are at the right place before doing this as you do not want to remove any files from the good system.
- unmount the partition 1, and put the disk back into the TS it came from at the same position in the cage.
- When all 4 disks have been done, reboot the TS and it should come back up in EM mode.
- Reflash - it should allow this to happen in recovery mode that does not need a password. Make sure that you use firmware that is enabled for telnet+root access so that if recovery is successful you can then get in to change the (unknown) password on the admin user. You can get telnet enabled variants of firmware via the links at my web site (http://homepage.ntlworld.com/itimpi/buffalo.htm). They are available for most of the Buffalo firmware releases.
Hope that helps?
The above process only touches partition 1 of each disk, so even if it is unsuccessful you should not have touched the data on partition 3 of each disk.