如何确定Linux下SSD的写周期数或预期寿命？

英特尔固态硬盘确实可以保留总写入数据以及可能的生命周期.

以下是英特尔X25-M G2 160GB(SSDSA2M160G2GC)

# smartctl -data -A /dev/sda
smartctl 5.40 2010-10-16 r3189 [x86_64-redhat-linux-gnu] (local build)
Copyright (C) 2002-10 by Bruce ALLEN,http://smartmontools.sourceforge.net

=== START OF READ smaRT DATA SECTION ===
smaRT Attributes Data Structure revision number: 5
Vendor Specific smaRT Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      updatED  WHEN_Failed RAW_VALUE
  3 Spin_Up_Time            0x0020   100   100   000    Old_age   Offline      -       0
  4 Start_Stop_Count        0x0030   100   100   000    Old_age   Offline      -       0
  5 Reallocated_Sector_Ct   0x0032   100   100   000    Old_age   Always       -       1
  9 Power_On_Hours          0x0032   100   100   000    Old_age   Always       -       6855
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       68
192 Unsafe_Shutdown_Count   0x0032   100   100   000    Old_age   Always       -       30
225 Host_Writes_32MiB       0x0030   200   200   000    Old_age   Offline      -       148487
226 Workld_Media_Wear_InDic 0x0032   100   100   000    Old_age   Always       -       3168
227 Workld_Host_Reads_Perc  0x0032   100   100   000    Old_age   Always       -       1
228 Workload_minutes        0x0032   100   100   000    Old_age   Always       -       1950295543
232 Available_Reservd_Space 0x0033   099   099   010    Pre-fail  Always       -       0
233 Media_Wearout_InDicator 0x0032   098   098   000    Old_age   Always       -       0
184 End-to-End_Error        0x0033   100   100   099    Pre-fail  Always       -       0

Host_Writes_32MIB原始值显示已向此驱动器写入了多少32MiB数据单元.

@H_589_20@media_Wearout_InDicator值显示驱动器有效磨损寿命的标准化百分比.这从100(或099,我忘记了)开始,然后继续到001,此时英特尔认为驱动器已超过其使用寿命.英特尔也将MWI用作保修索赔的一部分 – 一旦MWI达到001,保修期就已过期.

@H_589_20@mWI达到001并不意味着驱动器会立即失效！英特尔将内置容差来处理闪存单元的差异.我已经看到驱动器在这一点上持续了很长时间,并且我正在积极地测试一些英特尔320系列固态硬盘以查看它们持续多久.

但是,由于当MWI达到001时保修到期,我会在那时更换任何驱动器.