You are correct. Testdisk has been hanging trying to read both disks. I downloaded Crystalmark portable 64bit and it seems to read my SSD well. I have thought about cloning the drive but I cannot find a program that can see the drive or lock up when accessing it. Here is the Crystalmark Main page info on my SSD: (Note - the EVO 1TB is the drive with the data on it. The 256GB Pro is from the laptop being used to test the EVO 1TB.) Included for comparison info..
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CrystalDiskInfo 6.5.2 (C) 2008-2015 hiyohiyo
Crystal Dew World :
http://crystalmark.info/
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OS : Windows 10 Professional [10.0 Build 10240] (x64)
Date : 2015/08/10 8:28:08
-- Controller Map ----------------------------------------------------------
+ Intel(R) Mobile Express Chipset SATA AHCI Controller [ATA]
- Samsung SSD 840 PRO Seri
- TSSTcorp CDDVDW TS-U633A
- Microsoft Storage Spaces Controller [SCSI]
-- Disk List ---------------------------------------------------------------
(1) Samsung SSD 840 PRO Series : 256.0 GB [0/0/0, pd1] - sg
(2) Samsung SSD 840 EVO 1TB : 1000.2 GB [1/0/0, sa1] - sg
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(1) Samsung SSD 840 PRO Series
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Model : Samsung SSD 840 PRO Series
Firmware : DXM06B0Q
Serial Number : displayed but redacted
Disk Size : 256.0 GB (8.4/137.4/256.0/256.0)
Buffer Size : Unknown
Queue Depth : 32
# of Sectors : 500118192
Rotation Rate : ---- (SSD)
Interface : Serial ATA
Major Version : ACS-2
Minor Version : ATA8-ACS version 4c
Transfer Mode : SATA/600 | SATA/600
Power On Hours : 8456 hours
Power On Count : 785 count
Host Writes : 5486 GB
Wear Level Count : 49
Temperature : 32 C (89 F)
Health Status : Good (100 %)
Features : S.M.A.R.T., 48bit LBA, NCQ, TRIM
APM Level : ----
AAM Level : ----
-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
05 100 100 _10 000000000000 Reallocated Sector Count
09 _98 _98 __0 000000002108 Power-on Hours
0C _99 _99 __0 000000000311 Power-on Count
B1 _98 _98 __0 000000000031 Wear Leveling Count
B3 100 100 _10 000000000000 Used Reserved Block Count (Total)
B5 100 100 _10 000000000000 Program Fail Count (Total)
B6 100 100 _10 000000000000 Erase Fail Count (Total)
B7 100 100 _10 000000000000 Runtime Bad Block (Total)
BB 100 100 __0 000000000000 Uncorrectable Error Count
BE _68 _49 __0 000000000020 Airflow Temperature
C3 200 200 __0 000000000000 ECC Error Rate
C7 100 100 __0 000000000000 CRC Error Count
EB _99 _99 __0 000000000020 POR Recovery Count
F1 _99 _99 __0 0002ADDF2E54 Total LBA Written
-- IDENTIFY_DEVICE ---------------------------------------------------------
0 1 2 3 4 5 6 7 8 9
000: 0040 3FFF C837 0010 0000 0000 003F 0000 0000 0000
010: 5331 3252 4E45 4144 3335 3837 3938 4B20 2020 2020
020: 0000 0000 0000 4458 4D30 3642 3051 5361 6D73 756E
030: 6720 5353 4420 3834 3020 5052 4F20 5365 7269 6573
040: 2020 2020 2020 2020 2020 2020 2020 8010 4000 2F00
050: 4000 0200 0200 0007 3FFF 0010 003F FC10 00FB F110
060: FFFF 0FFF 0000 0007 0003 0078 0078 0078 0078 4F30
070: 0000 0000 0000 0000 0000 001F 850E 00C6 006C 006C
080: 03FC 0039 746B 7D01 4163 746B BC01 4163 407F 0001
090: 0001 0000 1043 0000 0000 0000 0000 0000 0000 0000
100: 32B0 1DCF 0000 0000 0000 0008 4000 0000 5002 5385
110: 5029 AC17 0000 0000 0000 0000 0000 0000 0000 401E
120: 401C 0000 0000 0000 0000 0000 0000 0000 002B 0000
130: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
140: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
150: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
160: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0001
170: 2020 2020 2020 2020 0000 0000 0000 0000 0000 0000
180: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
190: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
200: 0000 0000 0000 0000 0000 0000 003D 0000 0000 4000
210: 0000 0000 0000 0000 0000 0000 0000 0001 0000 0000
220: 0000 0000 107F 0000 0000 0000 0000 0000 0000 0000
230: 0000 0000 0000 0000 0000 0800 0000 0000 0000 0000
240: 0000 0000 0000 4000 0000 0000 0000 0000 0000 0000
250: 0000 0000 0000 0000 0000 42A5
-- SMART_READ_DATA ---------------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 01 00 05 33 00 64 64 00 00 00 00 00 00 00 09 32
010: 00 62 62 08 21 00 00 00 00 00 0C 32 00 63 63 11
020: 03 00 00 00 00 00 B1 13 00 62 62 31 00 00 00 00
030: 00 00 B3 13 00 64 64 00 00 00 00 00 00 00 B5 32
040: 00 64 64 00 00 00 00 00 00 00 B6 32 00 64 64 00
050: 00 00 00 00 00 00 B7 13 00 64 64 00 00 00 00 00
060: 00 00 BB 32 00 64 64 00 00 00 00 00 00 00 BE 32
070: 00 44 31 20 00 00 00 00 00 00 C3 1A 00 C8 C8 00
080: 00 00 00 00 00 00 C7 3E 00 64 64 00 00 00 00 00
090: 00 00 EB 12 00 63 63 20 00 00 00 00 00 00 F1 32
0A0: 00 63 63 54 2E DF AD 02 00 00 00 00 00 00 00 00
0B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 C4 D2 00 53
170: 03 00 01 00 02 14 00 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 34
-- SMART_READ_THRESHOLD ----------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 01 00 05 0A 00 00 00 00 00 00 00 00 00 00 09 00
010: 00 00 00 00 00 00 00 00 00 00 0C 00 00 00 00 00
020: 00 00 00 00 00 00 B1 00 00 00 00 00 00 00 00 00
030: 00 00 B3 0A 00 00 00 00 00 00 00 00 00 00 B5 0A
040: 00 00 00 00 00 00 00 00 00 00 B6 0A 00 00 00 00
050: 00 00 00 00 00 00 B7 0A 00 00 00 00 00 00 00 00
060: 00 00 BB 00 00 00 00 00 00 00 00 00 00 00 BE 00
070: 00 00 00 00 00 00 00 00 00 00 C3 00 00 00 00 00
080: 00 00 00 00 00 00 C7 00 00 00 00 00 00 00 00 00
090: 00 00 EB 00 00 00 00 00 00 00 00 00 00 00 F1 00
0A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4E
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(2) Samsung SSD 840 EVO 1TB
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Enclosure : Samsung SSD 840 EVO 1TB USB Device (V=357D, P=7788, sa1) - sg
Model : Samsung SSD 840 EVO 1TB
Firmware : EXT0DB6Q
Serial Number : displayed but redacted
Disk Size : 1000.2 GB (8.4/137.4/1000.2/1000.2)
Buffer Size : Unknown
Queue Depth : 32
# of Sectors : 1953525168
Rotation Rate : ---- (SSD)
Interface : USB (Serial ATA)
Major Version : ACS-2
Minor Version : ATA8-ACS version 4c
Transfer Mode : SATA/300 | SATA/600
Power On Hours : 5557 hours
Power On Count : 981 count
Host Writes : 5902 GB
Wear Level Count : 6
Temperature : 26 C (78 F)
Health Status : Good (100 %)
Features : S.M.A.R.T., 48bit LBA, NCQ, TRIM
APM Level : ----
AAM Level : ----
-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
05 100 100 _10 000000000000 Reallocated Sector Count
09 _98 _98 __0 0000000015B5 Power-on Hours
0C _99 _99 __0 0000000003D5 Power-on Count
B1 _99 _99 __0 000000000006 Wear Leveling Count
B3 100 100 _10 000000000000 Used Reserved Block Count (Total)
B5 100 100 _10 000000000000 Program Fail Count (Total)
B6 100 100 _10 000000000000 Erase Fail Count (Total)
B7 100 100 _10 000000000000 Runtime Bad Block (Total)
BB 100 100 __0 000000000000 Uncorrectable Error Count
BE _74 _41 __0 00000000001A Airflow Temperature
C3 200 200 __0 000000000000 ECC Error Rate
C7 100 100 __0 000000000000 CRC Error Count
EB _99 _99 __0 0000000000A6 POR Recovery Count
F1 _99 _99 __0 0002E1CF72D0 Total LBA Written
-- IDENTIFY_DEVICE ---------------------------------------------------------
0 1 2 3 4 5 6 7 8 9
000: 0040 3FFF C837 0010 0000 0000 003F 0000 0000 0000
010: 5331 4439 4E53 4146 3532 3531 3231 5620 2020 2020
020: 0000 0000 0000 4558 5430 4442 3651 5361 6D73 756E
030: 6720 5353 4420 3834 3020 4556 4F20 3154 4220 2020
040: 2020 2020 2020 2020 2020 2020 2020 8001 4001 2F00
050: 4000 0200 0200 0007 3FFF 0010 003F FC10 00FB 0101
060: FFFF 0FFF 0000 0007 0003 0078 0078 0078 0078 0F10
070: 0000 0000 0000 0000 0000 001F 850E 0044 006C 0060
080: 03FC 0039 746B 7D01 4163 746B BC01 4163 407F 0001
090: 0004 0000 1043 0000 0000 0000 0000 0000 0000 0000
100: 6DB0 7470 0000 0000 0000 0008 4000 0000 5002 5388
110: A046 AB90 0000 0000 0000 0000 0000 0000 0000 401E
120: 401C 0000 0000 0000 0000 0000 0000 0000 0027 0000
130: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
140: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
150: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
160: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0001
170: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
180: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
190: 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
200: 0000 0000 0000 0000 0000 0000 003D 0000 0000 4000
210: 0000 0000 0000 0000 0000 0000 0000 0001 0000 0000
220: 0000 0000 107F 0000 0000 0000 0000 0000 0000 0000
230: 0000 0000 0000 0000 0000 0800 0000 0000 0000 0000
240: 0000 0000 0000 4000 0000 0000 0000 0000 0000 0000
250: 0000 0000 0000 0000 0000 56A5
-- SMART_READ_DATA ---------------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 01 00 05 33 00 64 64 00 00 00 00 00 00 00 09 32
010: 00 62 62 B5 15 00 00 00 00 00 0C 32 00 63 63 D5
020: 03 00 00 00 00 00 B1 13 00 63 63 06 00 00 00 00
030: 00 00 B3 13 00 64 64 00 00 00 00 00 00 00 B5 32
040: 00 64 64 00 00 00 00 00 00 00 B6 32 00 64 64 00
050: 00 00 00 00 00 00 B7 13 00 64 64 00 00 00 00 00
060: 00 00 BB 32 00 64 64 00 00 00 00 00 00 00 BE 32
070: 00 4A 29 1A 00 00 00 00 00 00 C3 1A 00 C8 C8 00
080: 00 00 00 00 00 00 C7 3E 00 64 64 00 00 00 00 00
090: 00 00 EB 12 00 63 63 A6 00 00 00 00 00 00 F1 32
0A0: 00 63 63 D0 72 CF E1 02 00 00 00 00 00 00 00 00
0B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 98 3A 00 53
170: 03 00 01 00 02 FA 00 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 74
-- SMART_READ_THRESHOLD ----------------------------------------------------
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
000: 01 00 05 0A 00 00 00 00 00 00 00 00 00 00 09 00
010: 00 00 00 00 00 00 00 00 00 00 0C 00 00 00 00 00
020: 00 00 00 00 00 00 B1 00 00 00 00 00 00 00 00 00
030: 00 00 B3 0A 00 00 00 00 00 00 00 00 00 00 B5 0A
040: 00 00 00 00 00 00 00 00 00 00 B6 0A 00 00 00 00
050: 00 00 00 00 00 00 B7 0A 00 00 00 00 00 00 00 00
060: 00 00 BB 00 00 00 00 00 00 00 00 00 00 00 BE 00
070: 00 00 00 00 00 00 00 00 00 00 C3 00 00 00 00 00
080: 00 00 00 00 00 00 C7 00 00 00 00 00 00 00 00 00
090: 00 00 EB 00 00 00 00 00 00 00 00 00 00 00 F1 00
0A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
110: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
130: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
140: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
160: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
170: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
190: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 4E