这固态是什么奇怪的毛病？

今天凌晨三点接到 PVE 的警报邮件说有个 MX500 出现了 C5 警告（待映射的块）。

This message was generated by the smartd daemon running on:

   host name:  pve
   DNS domain: homenetwork.******

The following warning/error was logged by the smartd daemon:

Device: /dev/sde [SAT], 1 Currently unreadable (pending) sectors

Device info:
CT4000MX500SSD1, S/N:2247E******6E, WWN:5-******-1******d6e, FW:M3CR045, 4.00 TB

For details see host's SYSLOG.

但是我下午回家用 smartctl 看数据的时候，就完全没有任何不正常的值……

Vendor Specific SMART Attributes with Thresholds:
ID#  ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
0x01 Raw_Read_Error_Rate     0x002f   100   100   000    Pre-fail  Always       -       0
0x05 Reallocate_NAND_Blk_Cnt 0x0032   100   100   010    Old_age   Always       -       0
0x09 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       2297
0x0c Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       6
0xab Program_Fail_Count      0x0032   100   100   000    Old_age   Always       -       0
0xac Erase_Fail_Count        0x0032   100   100   000    Old_age   Always       -       0
0xad Ave_Block-Erase_Count   0x0032   100   100   000    Old_age   Always       -       12
0xae Unexpect_Power_Loss_Ct  0x0032   100   100   000    Old_age   Always       -       0
0xb4 Unused_Reserve_NAND_Blk 0x0033   000   000   000    Pre-fail  Always       -       241
0xb7 SATA_Interfac_Downshift 0x0032   100   100   000    Old_age   Always       -       0
0xb8 Error_Correction_Count  0x0032   100   100   000    Old_age   Always       -       0
0xbb Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
0xc2 Temperature_Celsius     0x0022   074   061   000    Old_age   Always       -       26 (Min/Max 8/39)
0xc4 Reallocated_Event_Count 0x0032   100   100   000    Old_age   Always       -       0
0xc5 Current_Pending_ECC_Cnt 0x0032   100   100   000    Old_age   Always       -       0
0xc6 Offline_Uncorrectable   0x0030   100   100   000    Old_age   Offline      -       0
0xc7 UDMA_CRC_Error_Count    0x0032   100   100   000    Old_age   Always       -       0
0xca Percent_Lifetime_Remain 0x0030   100   100   001    Old_age   Offline      -       0
0xce Write_Error_Rate        0x000e   100   100   000    Old_age   Always       -       0
0xd2 Success_RAIN_Recov_Cnt  0x0032   100   100   000    Old_age   Always       -       0
0xf6 Total_LBAs_Written      0x0032   100   100   000    Old_age   Always       -       32955317888
0xf7 Host_Program_Page_Count 0x0032   100   100   000    Old_age   Always       -       280500370
0xf8 FTL_Program_Page_Count  0x0032   100   100   000    Old_age   Always       -       247975539

跑了一遍 SMART 测试也是没有发现任何问题…… 这是什么奇怪的问题？是否需要返厂这块固态？