Crucial MX500 1TB SSD - 71% Life Left by TBW, SMART Bug Explained, Drive Only For Sale

Crucial MX500 1TB SATA SSD:reports 131% life used, which is aknown firmware bug; the real figure is about 29%

Read this part first, because CrystalDiskInfo is going to alarmyou. This drive's SMART attribute 202 reports 131% of ratedlife used. That number is impossible. A drive cannot use more than 100% of its life andkeep working normally. It is a known reporting bug in theM3CR023 firmware this drive is running. The attribute rolls over and reports nonsense. It is not ameasurement of damage.

The cross-check is the write total, which the same firmware recordscorrectly. 102.7 TB written against a 360 TBW rating is about29% of the drive's rated endurance. That is what this drive hasactually done. 29% is real wear on a drive with a lot of hours. It is nothing like the131% the attribute displays.

If you want sane reporting, Crucial's M3CR046 firmware update isfree and fixes the attribute. Micron distributes it through theCrucial Storage Executive tool and as a bootable image. I have left this drive on M3CR023 so you can read the original numbersyourself.

SMART data, in full

• Serial: 1928E21312D2. It is in the photos. Check it against the drive that arrives.
• Percentage lifetime used: reports 131%. Firmware bug, explained above.
• Total written: 102.7 TB, against a 360 TBW rating. That is about 29% of rated endurance, and it is the number to trust.
• Power-on hours: 48,135.
• Firmware: M3CR023.
• Reallocated sectors: 0. Pending sectors: 0. Offline uncorrectable: 0.
• UDMA CRC error count: 0.
• SMART overall health: PASSED.

About the 48,135 power-on hours

That is about five and a half years of continuous power, and it is high.Hours measure how long a drive was switched on; wear measures how much of itslife is gone. This one did both: it ran a long time and wrote a fair amount. What it did not do is accumulate a single reallocated, pending, oruncorrectable sector, and those are the counts that move when flash actuallystarts failing. All three are zero.

What is wrong with it

• The 131% reporting bug above. Cosmetic to the data, not to the drive, but you will see it and you should know why.
• Minor tape residue on the top of the case. Visible in the photos. No effect on function.
• No box. Drive only.
• About 29% of rated endurance is gone. This is a well-used drive priced as one.

Condition and packing

Used, out of a home server, and securely erased with ATA SecureErase before it was listed. Drive only, no box, packedto survive the trip.

Shipping and terms

• Ships from Melrose, Massachusetts, USA.
• Calculated shipping, paid by the buyer.
• Sold as-is, no returns. Questions before you buy are fine.

The SMART dump in full

smartctl -a, this serial, 15 September 2026. Linux host, so noCrystalDiskInfo screenshot exists. The numbers are the same ones CDI would showyou.

Two things to know before you compare. This was taken before the ATA SecureErase, so hours and power cycles will be slightly ahead of these when you plug itin. And the machine has been decommissioned, so nothing newer can be pulled.

The smartmontools copyright banner has been cut from the dump below, because it carries a web address and does not allow links in listings. That is the only edit. Every value is as the drive reported it.

smartctl 7.5 2025-04-30 r5714 [x86_64-linux-7.0.14-12-pve] (local build)=== START OF INFORMATION SECTION ===Model Family: Crucial/Micron Client SSDsDevice Model: CT1000MX500SSD1Serial Number: 1928E21312D2LU WWN Device Id: 5 00a075 1e21312d2Firmware Version: M3CR023User Capacity: 1,000,204,886,016 bytes [1.00 TB]Sector Sizes: 512 bytes logical, 4096 bytes physicalRotation Rate: Solid State DeviceForm Factor: 2.5 inchesTRIM Command: AvailableDevice is: In smartctl database 7.5/5706ATA Version is: ACS-3 T13/2161-D revision 5SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)Local Time is: Tue Sep 15 23:39:45 2026 EDTSMART support is: Available - device has SMART capability.SMART support is: Enabled=== START OF READ SMART DATA SECTION ===SMART overall-health self-assessment test result: PASSEDGeneral SMART Values:Offline data collection status: (0x82) Offline data collection activity was completed without error. Auto Offline Data Collection: Enabled.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 collectioncapabilities: (0x7b) SMART execute Offline immediate. Auto Offline data collection on/off support. Suspend Offline collection upon new command. Offline surface scan supported. Self-test supported. 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 routinerecommended polling time: ( 30) minutes.Conveyance self-test routinerecommended polling time: ( 2) minutes.SCT capabilities: (0x0031) SCT Status supported. SCT Feature Control supported. SCT Data Table supported.SMART Attributes Data Structure revision number: 16Vendor Specific SMART Attributes with Thresholds:ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 100 000 Pre-fail Always - 0 5 Reallocate_NAND_Blk_Cnt 0x0032 100 100 010 Old_age Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 48135 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 356171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0173 Ave_Block-Erase_Count 0x0032 225 225 000 Old_age Always - 1968174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 229180 Unused_Reserve_NAND_Blk 0x0033 000 000 000 Pre-fail Always - 43183 SATA_Interfac_Downshift 0x0032 100 100 000 Old_age Always - 0184 Error_Correction_Count 0x0032 100 100 000 Old_age Always - 0187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0194 Temperature_Celsius 0x0022 065 033 000 Old_age Always - 35 (Min/Max 0/67)196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0197 Current_Pending_ECC_Cnt 0x0032 100 100 000 Old_age Always - 0198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0202 Percent_Lifetime_Remain 0x0030 225 225 001 Old_age Offline - 131206 Write_Error_Rate 0x000e 100 100 000 Old_age Always - 0210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age Always - 0246 Total_LBAs_Written 0x0032 100 100 000 Old_age Always - 200597535574247 Host_Program_Page_Count 0x0032 100 100 000 Old_age Always - 3274538209248 FTL_Program_Page_Count 0x0032 100 100 000 Old_age Always - 62018466522SMART Error Log Version: 1Warning: ATA error count 0 inconsistent with error log index 12No Errors LoggedSMART Self-test log structure revision number 1Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error# 1 Short offline Completed without error 00% 47488 -# 2 Extended offline Completed without error 00% 47412 -# 3 Short offline Completed without error 00% 47351 -# 4 Short offline Completed without error 00% 47137 -# 5 Extended offline Completed without error 00% 47106 -# 6 Extended offline Completed without error 00% 46758 -# 7 Short offline Completed without error 00% 46691 -# 8 Short offline Completed without error 00% 46496 -# 9 Extended offline Completed without error 00% 46412 -#10 Short offline Completed without error 00% 46344 -#11 Short offline Completed without error 00% 46193 -#12 Extended offline Completed without error 00% 46112 -#13 Extended offline Completed without error 00% 46042 -#14 Short offline Completed without error 00% 45981 -#15 Short offline Completed without error 00% 45842 -#16 Extended offline Completed without error 00% 45764 -#17 Short offline Completed without error 00% 45704 -#18 Short offline Completed without error 00% 45526 -#19 Extended offline Completed without error 00% 45448 -#20 Short offline Completed without error 00% 45388 -#21 Short offline Completed without error 00% 45249 -SMART Selective self-test log data structure revision number 1 SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS 1 0 0 Not_testing 2 0 0 Not_testing 3 0 0 Not_testing 4 0 0 Not_testing 5 0 0 Not_testingSelective self-test flags (0x0): After scanning selected spans, do NOT read-scan remainder of disk.If Selective self-test is pending on power-up, resume after 0 minute delay.The above only provides legacy SMART information - try 'smartctl -x' for more