choose between two ssd disks according to drivedx results

[Macintos]

hello how are you
I'm new to the forum, greetings

sorry for my English
I have a question to solve and I ask for help

I have to choose between two used ssd disks that give these results with drivedx.
Both discs work properly apparently, i have not noticed anything that makes me think that they could be giving failures...

Apple SSD SD0128F (SanDisk-based):
SSD Lifetime Left Indicator - 96.7
Wear Leveling Count - 97

and

Apple SSD SM0256F (Samsung-based):
SSD Lifetime Left Indicator - 100
Wear Leveling Count - 74

As I have read it seems that the result of Wear Leveling Count would be the most important, but the other result confuses me.

Is the difference between both discs significant?
Should I observe some other value of those provided by drivedx or some other tool?
Which one would you choose?

thank you very much for your attention

 

[Macintos]

Hello everyone...


These are the results using command

smartctl -a /dev/sda

from a linux usb-live system.

Both discs work correctly, without any incident to mention, but I must choose one.

There is really a big difference between them, because I prefer to choose the 256Gb one, of course, but maybe there is a defect with that model or something?


APPLE SSD SD0128F (Sandisk-based)

Model Family:     Apple SD/SM/TS...E/F SSDs

Device Model:     APPLE SSD SD0128F

Serial Number:    1336A2406996

LU WWN Device Id: 5 001b44 a3109ecd4

Firmware Version: A222821

User Capacity:    121,332,826,112 bytes [121 GB]

Sector Sizes:     512 bytes logical, 4096 bytes physical

Rotation Rate:    Solid State Device

Form Factor:      Unknown (0x0012)

Device is:        In smartctl database [for details use: -P show]

ATA Version is:   ATA8-ACS T13/1699-D revision 6

SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)

Local Time is:    Tue Aug  6 16:45:47 2019 UTC

SMART support is: Available - device has SMART capability.

SMART support is: Enabled


=== START OF READ SMART DATA SECTION ===

SMART overall-health self-assessment test result: PASSED


General SMART Values:

Offline data collection status:  (0x00)    Offline data collection activity

                    was never started.

                    Auto Offline Data Collection: Disabled.

Total time to complete Offline

data collection:         (    0) seconds.

Offline data collection

capabilities:              (0x00)     Offline data collection not supported.

SMART capabilities:            (0x0003)    Saves SMART data before entering

                    power-saving mode.

                    Supports SMART auto save timer.

Error logging capability:        (0x01)    Error logging supported.

                    General Purpose Logging supported.


SMART Attributes Data Structure revision number: 40

Vendor Specific SMART Attributes with Thresholds:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE

  1 Raw_Read_Error_Rate     0x000f   100   100   000    Pre-fail  Always       -       0

  5 Reallocated_Sector_Ct   0x000f   100   100   000    Pre-fail  Always       -       0

  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       1964

12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       12907

169 Unknown_Attribute       0x0022   100   100   010    Old_age   Always       -       738908440288

173 Wear_Leveling_Count     0x0022   187   187   100    Old_age   Always       -       906265231668

174 Host_Reads_MiB          0x0030   100   100   000    Old_age   Offline      -       33776019

175 Host_Writes_MiB         0x0030   100   100   000    Old_age   Offline      -       25314071

192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       146

194 Temperature_Celsius     0x0022   035   035   000    Old_age   Always       -       65 (Min/Max 25/82)

197 Current_Pending_Sector  0x0032   000   000   000    Old_age   Always       -       0

199 UDMA_CRC_Error_Count    0x003e   100   100   000    Old_age   Always       -       0

244 Unknown_Attribute       0x0002   000   000   000    Old_age   Always       -       0


SMART Error Log not supported


SMART Self-test Log not supported


Selective Self-tests/Logging not supported

or


APPLE SSD SM0256F (Samsung-based)

Model Family:     Apple SD/SM/TS...E/F/G SSDs

Device Model:     APPLE SSD SM0256F

Serial Number:    S18WNYBD659207

LU WWN Device Id: 5 002538 655584d30

Firmware Version: UXM2EA1Q

User Capacity:    251.000.193.024 bytes [251 GB]

Sector Sizes:     512 bytes logical, 4096 bytes physical

Rotation Rate:    Solid State Device

Device is:        In smartctl database [for details use: -P show]

ATA Version is:   ATA8-ACS T13/1699-D revision 4c

SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 6.0 Gb/s)

Local Time is:    Tue Aug  6 18:34:08 2019 CEST

SMART support is: Available - device has SMART capability.

SMART support is: Enabled


=== START OF READ SMART DATA SECTION ===

SMART overall-health self-assessment test result: PASSED


General SMART Values:

Offline data collection status:  (0x00)    Offline data collection activity

                    was never started.

                    Auto Offline Data Collection: Disabled.

Self-test execution status:      (   0)    The previous self-test routine completed

                    without error or no self-test has ever

                    been run.

Total time to complete Offline

data collection:         (    0) seconds.

Offline data collection

capabilities:              (0x5f) SMART execute Offline immediate.

                    Auto Offline data collection on/off support.

                    Abort Offline collection upon new

                    command.

                    Offline surface scan supported.

                    Self-test supported.

                    No Conveyance Self-test supported.

                    Selective Self-test supported.

SMART capabilities:            (0x0003)    Saves SMART data before entering

                    power-saving mode.

                    Supports SMART auto save timer.

Error logging capability:        (0x01)    Error logging supported.

                    General Purpose Logging supported.

Short self-test routine

recommended polling time:      (   2) minutes.

Extended self-test routine

recommended polling time:      (  10) minutes.


SMART Attributes Data Structure revision number: 40

Vendor Specific SMART Attributes with Thresholds:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE

  1 Raw_Read_Error_Rate     0x001a   200   200   000    Old_age   Always       -       0

  5 Reallocated_Sector_Ct   0x0033   100   100   000    Pre-fail  Always       -       0

  9 Power_On_Hours          0x0032   098   098   000    Old_age   Always       -       6683

12 Power_Cycle_Count       0x0032   085   085   000    Old_age   Always       -       14949

169 Unknown_Apple_Attrib    0x0013   253   253   010    Pre-fail  Always       -       2027568500480

173 Wear_Leveling_Count     0x0032   174   174   100    Old_age   Always       -       2276384899741

174 Host_Reads_MiB          0x0022   099   099   000    Old_age   Always       -       10004491

175 Host_Writes_MiB         0x0022   099   099   000    Old_age   Always       -       8406574

192 Power-Off_Retract_Count 0x0012   099   099   000    Old_age   Always       -       2166

194 Temperature_Celsius     0x0022   061   061   000    Old_age   Always       -       39 (Min/Max 11/71)

197 Current_Pending_Sector  0x0022   100   100   000    Old_age   Always       -       0

199 UDMA_CRC_Error_Count    0x001a   200   200   000    Old_age   Always       -       0

240 Unknown_SSD_Attribute   0x0022   100   100   000    Old_age   Always       -       0


SMART Error Log Version: 1

No Errors Logged

I thought maybe you could help me, because I'm a beginner and I'm afraid to choose the worst...

 

[NoBoMac]

No experience with these, but, my old Mac had a Samsung SSD (830) and is rock solid. Got almost 7 years out of it before the Mac died. Pulled the drive and put it into a chassis and still using it for archive purposes.

This day and age, imo, SSDs will outlive the computer. Whatever is affordable and specs out well re read/write will be the correct choice. Need to write ALOT of data to wear out an SSD.

 

[aslr]

I agree with NoBoMac. However, wearing depends a lot on how full your SSD disk is. The fuller, the faster it will wear out. There is a really a nice explanation about that effect on YouTube.

 

[MSastre]

I would definitely go with a 256GB drive over a 128GB drive. Twice the available space.

 

[Macintos]

Thank you very much for all the answers.

I think I will choose the one of 256, because, I think it will be easier to have that 10% that they recommend in one of the YouTube videos...