LS520DN0402 rebuild taking days

[sumdumgai]

I have a flashing red light on my LS520 and Navigator says it's rebuilding with status I18.  It's been like this for about 3 days.  Is this normal and should I just let it keep running or should I do something else?  Also, should it be possible to connect to the LS while it's rebuilding?  I get a 'Unable to connect' message saying the drive may be too busy when I try to logon.

Thanks

Two days later and still flashing red.  Any suggestions?  Thanks.

[sumdumgai]

Two days later and still flashing red.  Any suggestions?  Thanks.

[oxygen8]

The Webif should be available on every state of the nas.

[sumdumgai]

Thanks.  Regarding the WEGIF, if I try to connect via IP address, I get 'Unable to connect'.  If I try 'BuffaloNas.com, I get 'Invalid BuffaloNAS.com name, but I know the name I use is correct.

[oxygen8]

one example for rebuilding a array

[1000001101000]

The exact time depends on a few factors but since it's not raid5 parity isn't an issue. Sometimes the rate is limited to prevent other issues but to rebuild a raid1 array or do a full fsck on a ~4tb array I would be concerned if it took more than a day.

I haven't used my 520 much but as mentioned earlier the web interface is independent of the drives, so if it's unavailable it would seem something is wrong. 

[sumdumgai]

Thanks.  After several days of flashing amber and I18, I decided to pull the plug.  I had tried to switch off, but that didn't do anything.  So, I disconnected power and reconnected.  It rebooted.  The WEBIF then worked and disk management said Disk 2 was not formatted.  I formatted it and started another rebuild.  This time it finished in about 3 hours.  No data loss.