key block from a WD with JMS528S chip

00000000 57 44 76 31 b3 db 00 00 00 b8 bf d1 01 00 00 00 |WDv1³Û...¸¿Ñ....|
00000010 03 00 00 00 00 00 f0 00 00 00 00 00 00 00 00 00 |......ð.........|
00000020 01 00 00 00 00 00 46 50 00 00 00 00 00 00 00 00 |......FP........|
00000030 00 02 ff 00 00 00 00 00 00 00 00 00 00 00 00 00 |..ÿ.............|
00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000050 20 00 3a 6a 00 00 00 01 00 00 00 00 57 44 76 31 | .:j........WDv1|
00000060 09 f8 45 57 df 43 28 50 2c 9e 4c 92 a0 93 b1 ed |.øEWßC(P,.L. .±í|
00000070 1c 7e a7 1a 2a a5 8f 58 f5 06 c1 b5 6b 26 e7 18 |.~§.*¥.Xõ.Áµk&ç.|
00000080 5f d8 6e 2d 42 92 fe 5b 06 bc 30 b4 65 0f 87 b6 |_Øn-B.þ[.¼0´e..¶|
00000090 0c 17 d5 a6 34 5e a9 97 b2 3b bd 5c 24 82 57 e2 |..Õ¦4^©.²;½\$.Wâ|
000000a0 bb 34 a8 88 de 03 86 d9 bd 99 70 bb 61 a7 35 d9 |»4¨.Þ..Ù½.p»a§5Ù|
000000b0 92 d7 0a b4 ad 5a 94 dd 2e 8b 60 7f 22 df b8 32 |.×.´­Z.Ý..`."߸2|
000000c0 bf 6c f9 2c 38 65 47 90 59 2d b2 14 b8 07 bf 1b |¿lù,8eG.Y-².¸.¿.|
000000d0 d1 0a 4b fb ab 90 a6 bb f1 50 f2 4d 09 a7 f5 4b |Ñ.Kû«.¦»ñPòM.§õK|
000000e0 d5 57 6e e4 64 46 0d 6b 75 42 9d 3a 91 6d 1d 61 |ÕWnädF.kuB.:.m.a|
000000f0 71 f7 75 13 d6 b4 d3 2a 4e 3c c3 40 eb 8f 56 8d |q÷u.Ö´Ó*N<Ã@ë.V.|
00000100 c6 31 46 6c 7d 59 fb 8a f9 84 02 96 02 e7 1b e5 |Æ1Fl}Yû.ù....ç.å|
00000110 2f cd b0 13 6c 88 3f f9 1b 3f 3a b8 51 f5 20 57 |/Í°.l.?ù.?:¸Qõ W|
00000120 c2 4a 55 db dd 13 28 aa fa 4d 95 21 66 0c 13 48 |ÂJUÛÝ.(ªúM.!f..H|
00000130 8d 11 16 36 00 a2 60 ea f4 43 35 a7 92 d9 4c 13 |...6.¢`êôC5§.ÙL.|
00000140 36 d9 68 8b ae e5 cc fa 8b a9 d8 b8 52 8d c3 1c |6Ùh.®åÌú.©Ø¸R.Ã.|
00000150 6e d1 36 3d 51 43 2f 95 ee 6b eb 21 ea d8 45 a6 |nÑ6=QC/.îkë!êØE¦|
00000160 c2 09 55 bd b3 bd 0c b7 27 32 17 bb 23 e8 7d 79 |Â.U½³½.·'2.»#è}y|
00000170 7f 44 0f 2d 7f 22 99 22 d4 4f 02 1d 45 d3 49 25 |.D.-."."ÔO..EÓI%|
00000180 c0 d0 cf 3f c8 07 43 eb 12 28 d1 df ef ff 74 eb |ÀÐÏ?È.Cë.(Ñßïÿtë|
00000190 9f a8 5a 1f 22 96 af 5a 57 56 b2 54 87 08 c5 b6 |.¨Z.".¯ZWV²T..Ŷ|
000001a0 cf 1f 09 f0 f8 ed b1 d0 c0 a3 c9 26 b3 13 fc 47 |Ï..ðøí±ÐÀ£É&³.üG|
000001b0 80 e5 54 83 67 78 85 38 e2 57 92 aa 6d a1 3b bb |.åT.gx.8âW.ªm¡;»|
000001c0 fb a9 fe 7e 55 ad 91 b3 0b 4f 08 9f 5f ec da cb |û©þ~U­.³.O.._ìÚË|
000001d0 05 06 d6 64 0f 52 a8 5d fc cc da fa 3e 9e 12 a8 |..Öd.R¨]üÌÚú>..¨|
000001e0 6f 94 59 43 62 43 50 b5 9a 92 bc 7a c7 01 5a 42 |o.YCbCPµ..¼zÇ.ZB|
000001f0 53 48 6e f6 e7 bb c8 7c dc 0e 2c d1 bc 77 d1 40 |SHnöç»È|Ü.,ѼwÑ@|

no password was set, so the extracted key is
3baf6055cc76eb00e612a392031f240a06575f756d8beb77f27a3e298b015028

but to use it, it must be reversed:
2850018b293e7af277eb8b6d755f57060a241f0392a312e600eb76cc5560af3b