[CentOS] Disk near failure

Fri Oct 21 09:03:34 UTC 2016
Alessandro Baggi <alessandro.baggi at gmail.com>

Hi list,
on my workstation I've a md raid (mirror) for / on md1. This raid has 2 
ssd as members (each corsair GT force 120GB MLC). This disks are ~ 5 
years old.
Today I've checked my ssds smart status and I get:

ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE UPDATED 
WHEN_FAILED RAW_VALUE
   1 Raw_Read_Error_Rate     0x000f   100   100   050    Pre-fail Always 
       -       0/4754882
   5 Retired_Block_Count     0x0033   100   100   003    Pre-fail Always 
       -       0
   9 Power_On_Hours_and_Msec 0x0032   000   000   000    Old_age Always 
      -       17337h+11m+24.440s
  12 Power_Cycle_Count       0x0032   099   099   000    Old_age Always 
      -       1965
171 Program_Fail_Count      0x0032   000   000   000    Old_age   Always 
       -       0
172 Erase_Fail_Count        0x0032   000   000   000    Old_age   Always 
       -       0
174 Unexpect_Power_Loss_Ct  0x0030   000   000   000    Old_age Offline 
     -       780
177 Wear_Range_Delta        0x0000   000   000   000    Old_age Offline 
     -       3
181 Program_Fail_Count      0x0032   000   000   000    Old_age   Always 
       -       0
182 Erase_Fail_Count        0x0032   000   000   000    Old_age   Always 
       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always 
       -       0
194 Temperature_Celsius     0x0022   033   042   000    Old_age   Always 
       -       33 (Min/Max 15/42)
195 ECC_Uncorr_Error_Count  0x001c   120   120   000    Old_age Offline 
     -       0/4754882
196 Reallocated_Event_Count 0x0033   100   100   003    Pre-fail  Always 
       -       0
201 Unc_Soft_Read_Err_Rate  0x001c   120   120   000    Old_age Offline 
     -       0/4754882
204 Soft_ECC_Correct_Rate   0x001c   120   120   000    Old_age Offline 
     -       0/4754882
230 Life_Curve_Status       0x0013   100   100   000    Pre-fail  Always 
       -       100
231 SSD_Life_Left           0x0013   100   100   010    Pre-fail  Always 
       -       0
233 SandForce_Internal      0x0000   000   000   000    Old_age Offline 
     -       6585
234 SandForce_Internal      0x0032   000   000   000    Old_age   Always 
       -       6885
241 Lifetime_Writes_GiB     0x0032   000   000   000    Old_age   Always 
       -       6885
242 Lifetime_Reads_GiB      0x0032   000   000   000    Old_age   Always 
       -       6244

The second ssd has very similar values.

SSD_Life_Left is 0 since ~ 1years ago for each ssd. Today these disks 
are working without problems:

# hdparm -tT /dev/md1

/dev/md1:
  Timing cached reads:   26322 MB in  2.00 seconds = 13181.10 MB/sec
  Timing buffered disk reads: 1048 MB in  3.00 seconds = 349.00 MB/sec

# hdparm -tT /dev/sda

/dev/sda:
  Timing cached reads:   26604 MB in  2.00 seconds = 13322.82 MB/sec
  Timing buffered disk reads: 1140 MB in  3.00 seconds = 379.87 MB/sec

# hdparm -tT /dev/sdb

/dev/sdb:
  Timing cached reads:   26258 MB in  2.00 seconds = 13148.38 MB/sec
  Timing buffered disk reads: 1140 MB in  3.00 seconds = 379.70 MB/sec

# dd if=/dev/zero of=file count=2000000
2000000+0 record in
2000000+0 record out
1024000000 byte (1,0 GB) copied, 2,36335 s, 433 MB/s


My ssds are failing?

Thanks in advance.