Re: De la mort des SSDs ...

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Author: Jerome Kieffer
Date:  
To: samuel veyre
CC: ML Guilde
Subject: Re: De la mort des SSDs ...
On Wed, 11 Jul 2018 15:01:36 +0200
samuel veyre <samuel.veyre@???> wrote:

> Bonjour Jérôme,
>
> Par curiosité, que signifie l'indicateur "Media Wearout Indicator" sur ta
> capture d'écran ? C'est cet indicateur qui tombe en flèche dans tes courbes.
> Je suppose que çà a un rapport avec le nombre d'écritures ?
>
> Je trouve ces explications sur wikipedia anglais mais je ne comprends pas :
> Intel SSDs report a normalized value from 100, a new drive, to a minimum of
> 1. It decreases while the NAND erase cycles increase from 0 to the
> maximum-rated cycles.Previously (pre-2010) occasionally used for Power-On
> Hours (more typically reported in 0x09).
> SOURCE : https://en.wikipedia.org/wiki/S.M.A.R.T.
>
> Cet indicateur n'est pas cité sur cette page qui se veut pourtant
> exhaustive :
> http://smartlinux.sourceforge.net/smart/attributes.php


Bonjour Samuel,

C'est la premiere fois que j'ai un SSD qui montre son usure ...
Intel m'a assuré que cela passait en garantie des que le "Wearout
indicator" est à 0.

Ce qui m'inquiete plus c'est que l'espace en reserve commence a diminuer

Sur la page que tu as indiqué, il est précisé:
Please note that some disk manufacturers use their own ID's for attributes.

Voici la sortie brute si tu veux récupérer les IDs:

smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.9.0-6-amd64] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Intel 53x and Pro 2500 Series SSDs
Device Model:     INTEL SSDSC2BW240H6
Serial Number:    CVTR53600063240CGN
LU WWN Device Id: 5 5cd2e4 14c938df0
Firmware Version: RG21
User Capacity:    240 057 409 536 bytes [240 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-3 (minor revision not indicated)
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Wed Jul 11 15:11:03 2018 CEST
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

General SMART Values:
Offline data collection status:  (0x00)    Offline data collection activity
                    was never started.
                    Auto Offline Data Collection: Disabled.
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:         ( 5860) seconds.
Offline data collection
capabilities:              (0x7f) SMART execute Offline immediate.
                    Auto Offline data collection on/off support.
                    Abort 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 routine
recommended polling time:      (  58) minutes.
Conveyance self-test routine
recommended polling time:      (   4) minutes.
SCT capabilities:            (0x0025)    SCT Status supported.
                    SCT Data Table supported.


SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0032   100   100   000    Old_age   Always       -       17
  9 Power_On_Hours_and_Msec 0x0032   100   100   000    Old_age   Always       -       10216h+00m+00.000s
 12 Power_Cycle_Count       0x0032   100   100   000    Old_age   Always       -       22
170 Available_Reservd_Space 0x0033   084   100   010    Pre-fail  Always       -       0
171 Program_Fail_Count      0x0032   100   100   000    Old_age   Always       -       0
172 Erase_Fail_Count        0x0032   100   100   000    Old_age   Always       -       0
174 Unexpect_Power_Loss_Ct  0x0032   100   100   000    Old_age   Always       -       6
183 SATA_Downshift_Count    0x0032   100   100   000    Old_age   Always       -       1
184 End-to-End_Error        0x0033   100   100   090    Pre-fail  Always       -       0
187 Uncorrectable_Error_Cnt 0x0032   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0032   034   100   000    Old_age   Always       -       34 (Min/Max 12/46)
192 Power-Off_Retract_Count 0x0032   100   100   000    Old_age   Always       -       6
199 UDMA_CRC_Error_Count    0x0032   100   100   000    Old_age   Always       -       1
225 Host_Writes_32MiB       0x0032   100   100   000    Old_age   Always       -       515161
226 Workld_Media_Wear_Indic 0x0032   100   100   000    Old_age   Always       -       65535
227 Workld_Host_Reads_Perc  0x0032   100   100   000    Old_age   Always       -       15
228 Workload_Minutes        0x0032   100   100   000    Old_age   Always       -       65535
232 Available_Reservd_Space 0x0033   084   100   010    Pre-fail  Always       -       0
233 Media_Wearout_Indicator 0x0032   028   100   000    Old_age   Always       -       0
241 Host_Writes_32MiB       0x0032   100   100   000    Old_age   Always       -       515161
242 Host_Reads_32MiB        0x0032   100   100   000    Old_age   Always       -       83122
249 NAND_Writes_1GiB        0x0032   100   100   000    Old_age   Always       -       258845


SMART Error Log not supported

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Aborted by host               00%     10216         -
# 2  Short offline       Aborted by host               00%      8472         -
# 3  Extended offline    Aborted by host               00%      8468         -
# 4  Extended offline    Aborted by host               00%      8468         -
# 5  Extended offline    Aborted by host               00%      5517         -
# 6  Extended offline    Aborted by host               00%      5517         -
# 7  Extended offline    Aborted by host               00%      5355         -
# 8  Extended offline    Aborted by host               00%      2070         -
# 9  Extended offline    Aborted by host               00%      2018         -


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_testing
Selective 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.


--
Jérôme Kieffer
tel +33 476 882 445