SMART data & Self tests, not sure if my SSD is on it's last gasp

[Bruce Labitt]

I think I have a SSD on the way out.  Last reboot took a REALLY long 
time.  Like 30 minutes.  I ran the smart data and self test and the SSD 
passes.  Overall assessment is disk is ok.  I really don't know how to 
interpret what the results are.

I think the disk is in pre-fail based on the smartctl output below

/snip

=== START OF INFORMATION SECTION ===
Model Family:     Crucial/Micron RealSSD m4/C400/P400
Device Model:     M4-CT256M4SSD2
Serial Number:    000000001247091DC2FF
LU WWN Device Id: 5 00a075 1091dc2ff
Firmware Version: 040H
User Capacity:    256,060,514,304 bytes [256 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-2, 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:    Wed Dec 30 13:49:17 2020 EST
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

/snip

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      
UPDATED  WHEN_FAILED RAW_VALUE
   1 Raw_Read_Error_Rate     0x002f   100   100   050 Pre-fail  
Always       -       0
   5 Reallocated_Sector_Ct   0x0033   100   100   010 Pre-fail  
Always       -       0
   9 Power_On_Hours          0x0032   100   100   001 Old_age   
Always       -       7294
  12 Power_Cycle_Count       0x0032   100   100   001 Old_age   
Always       -       2511
170 Grown_Failing_Block_Ct  0x0033   100   100   010 Pre-fail  
Always       -       0
171 Program_Fail_Count      0x0032   100   100   001 Old_age   
Always       -       0
172 Erase_Fail_Count        0x0032   100   100   001 Old_age   
Always       -       0
173 Wear_Leveling_Count     0x0033   098   098   010 Pre-fail  
Always       -       66
174 Unexpect_Power_Loss_Ct  0x0032   100   100   001 Old_age   
Always       -       87
181 Non4k_Aligned_Access    0x0022   100   100   001 Old_age   
Always       -       10250 5047 5203
183 SATA_Iface_Downshift    0x0032   100   100   001 Old_age   
Always       -       0
184 End-to-End_Error        0x0033   100   100   050 Pre-fail  
Always       -       0
187 Reported_Uncorrect      0x0032   100   100   001 Old_age   
Always       -       0
188 Command_Timeout         0x0032   100   100   001 Old_age   
Always       -       0
189 Factory_Bad_Block_Ct    0x000e   100   100   001 Old_age   
Always       -       81
194 Temperature_Celsius     0x0022   100   100   000 Old_age   
Always       -       0
195 Hardware_ECC_Recovered  0x003a   100   100   001 Old_age   
Always       -       0
196 Reallocated_Event_Count 0x0032   100   100   001 Old_age   
Always       -       0
197 Current_Pending_Sector  0x0032   100   100   001 Old_age   
Always       -       0
198 Offline_Uncorrectable   0x0030   100   100   001 Old_age   
Offline      -       0
199 UDMA_CRC_Error_Count    0x0032   100   100   001 Old_age   
Always       -       0
202 Perc_Rated_Life_Used    0x0018   098   098   001 Old_age   
Offline      -       2
206 Write_Error_Rate        0x000e   100   100   001 Old_age   
Always       -       0

Replace the disk pronto?  Is that what this is telling me?  Or?

I recently copied over many important files to another disk.  And 
downloaded a new OS.  I just hate re-configuring things, and starting 
from scratch, it's such a pain.  Not as painful as a disk crash, but 
close.  I've got loads of stuff I've compiled from source and just 100's 
of things to check or update.  Yes, I'll just have to do it.  It's just 
the week plus of recovery that I'm rebelling against.

Anything else I should do first?  Check something?  Run a test? Any tips 
to make the "recovery" less painful?