How get data back from lost partitions on Synology NAS?

[iwannaknow]

After a upgrade there was no access to either download station or audio station, etc.
Trying to reset password and system reset caused volume1 (RAID1) being lost.
But I did not perform a format!
To create a volume, both the drives needed to be formatted, which I obviously did not do.

In a topic on a Synology forum, I was advised to take one drive out and connect it physically to a Windows computer.
I did that and on the Windows 7 desktop in disk management I noticed that the connected disk had only 2 partitions,
and a large unpartitioned volume (which previously was the data partition)

To recover data, I already tried several programs, none of those did the trick though.

Then I started using SystemResueCD (booted from USB)
I read about TestDisk on "post19831.html#p19831"
So I ran TestDrive.
Running TestDrive, I viewed the log and found the following log being created:


Disk /dev/sdb - 2000 GB / 1863 GiB - CHS 243201 255 63
Partition Start End Size in sectors
D Linux 132 115 48 442 125 3 4980736 [1.42.6-7308]
D Linux 135 65 59 445 75 14 4980736 [1.42.6-7308]
D Linux 137 173 37 447 182 55 4980736 [1.42.6-7308]
D Linux Swap 310 9 20 571 30 35 4194304
D Linux RAID 310 9 20 571 30 35 4194304 [md1]
D Linux RAID 587 111 37 243200 235 43 3897585664 [DS1MKS:2]
D Linux 587 144 6 243201 13 12 3897585664 [1.42.6-3776]
D FAT12 25217 254 62 25218 195 1 12288 [Firmware]
D FAT12 25254 52 15 25254 247 17 12288 [Firmware]
D FAT12 57654 9 20 57654 41 51 2048 [NO NAME]
D Linux 63431 36 30 63785 138 33 5693440
D Linux 66660 2 31 67014 104 34 5693440
D HFS 204798 152 27 204803 47 44 73728 [CDJ-4503776]
D HFS 204815 238 32 204824 56 32 133120 [CDJ-3103776]
D HFS 204822 13 56 204836 52 16 227328 [CDJ-4603776]
D HFS 204865 231 39 204887 115 28 346112 [CDJ-4553776]

How do I get the data back?