buffalo terastation ts xe8.0tl 2 of 4 drive failures

[SimonFripp]

I had a drive broken replace drive message on Disk 3 of 4. I replaced it and instantly got a message to say that Disk 1 was broken.
As far as I can see, the array hasn't rebuilt and I'm not sure what the best thing to do is and whether I have lost all my data.

Here's a log selection:-

Aug  5 18:52:27  kernelmon: DISK_NO=1 : DISK_STATUS=array1 : RAID_LEVEL=raid5
Aug  5 18:52:34  kernelmon: lcd_error_man.sh array1_raid_error on diag_on(old error code)
Aug  5 18:52:34  kernelmon: lcd_error_man.sh disk1_broken_error off(disk1_fault_error) on diag_on buzzer_long_on
Aug  5 18:52:35  errormon[1833]: Error situation detected! HD1 Broken   E30Replace the DISK
Aug  5 18:52:54  hdd_remove: Disk(disk1) removed : Status (array1)

BUT it then shows Disk 3 as still degraded later on ..

Aug 11 17:28:37 start_data_array.sh:  array1=raid5 ... [OK]
Aug 11 17:28:37 start_data_array.sh:  array2=off ... [skip]
Aug 11 17:28:37 start_data_array.sh:  disk1=degrade ... [OK]
Aug 11 17:28:37 start_data_array.sh:  disk2=array1 ... [OK]
Aug 11 17:28:37 start_data_array.sh:  disk3=degrade ... [OK]
Aug 11 17:28:37 start_data_array.sh:  disk4=array1 ... [OK]

Any recommendations greatly appreciated.

[davo]

If you don't have a backup then this is the first thing you need to be doing.

[SimonFripp]

I can't access any of the data from the NAS at the moment.