BTRFS snapshots and laptop SSD's, KDE

English Install/Boot/Login
#1

The SSD is about 5 years old. Cost me $400 at the time. Here is the report that gave me. I formatted the SSD with snapshots enabled. The report doesn’t look too good. Can you give me an expert run down?

# sudo smartctl -a /dev/sda2
smartctl 6.5 2016-05-07 r4318 [x86_64-linux-4.4.138-59-default] (SUSE RPM)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Family:     Samsung based SSDs
Device Model:     Samsung SSD 850 EVO 1TB
Serial Number:    S21CNWAFC18116L
LU WWN Device Id: 5 002538 870062643
Firmware Version: EMT01B6Q
User Capacity:    1,000,204,886,016 bytes [1.00 TB]
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-2, ATA8-ACS T13/1699-D revision 4c
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Sun Jul  1 12:29:42 2018 PDT
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:      (  32) The self-test routine was interrupted
                                        by the host with a hard or soft reset.
Total time to complete Offline 
data collection:                (    0) seconds.
Offline data collection
capabilities:                    (0x53) SMART execute Offline immediate.
                                        Auto Offline data collection on/off support.
                                        Suspend Offline collection upon new
                                        command.
                                        No Offline surface scan supported.
                                        Self-test supported.
                                        No 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:        ( 530) minutes.
SCT capabilities:              (0x003d) SCT Status supported.
                                        SCT Error Recovery Control supported.
                                        SCT Feature Control supported.
                                        SCT Data Table supported.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0033   100   100   010    Pre-fail  Always       -       0
  9 Power_On_Hours          0x0032   099   099   000    Old_age   Always       -       2359
 12 Power_Cycle_Count       0x0032   098   098   000    Old_age   Always       -       1212
177 Wear_Leveling_Count     0x0013   099   099   000    Pre-fail  Always       -       5
179 Used_Rsvd_Blk_Cnt_Tot   0x0013   100   100   010    Pre-fail  Always       -       0
181 Program_Fail_Cnt_Total  0x0032   100   100   010    Old_age   Always       -       0
182 Erase_Fail_Count_Total  0x0032   100   100   010    Old_age   Always       -       0
183 Runtime_Bad_Block       0x0013   100   100   010    Pre-fail  Always       -       0
187 Uncorrectable_Error_Cnt 0x0032   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0032   062   048   000    Old_age   Always       -       38
195 ECC_Error_Rate          0x001a   200   200   000    Old_age   Always       -       0
199 CRC_Error_Count         0x003e   056   056   000    Old_age   Always       -       43513
235 POR_Recovery_Count      0x0012   099   099   000    Old_age   Always       -       205
241 Total_LBAs_Written      0x0032   099   099   000    Old_age   Always       -       11052238863

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Extended offline    Interrupted (host reset)      00%      2312         -
# 2  Extended offline    Completed without error       00%      2305         -
# 3  Extended offline    Completed without error       00%      2259         -
# 4  Extended offline    Completed without error       00%      2159         -
# 5  Extended offline    Interrupted (host reset)      00%      2052         -
# 6  Extended offline    Completed without error       00%      2051         -
# 7  Extended offline    Aborted by host               00%      2043         -

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.

Will turning off snapshots help at this point? For that matter, how do I do that without reformatting the drive?

#2

On Sun 01 Jul 2018 07:46:03 PM CDT, lord valarian wrote:

I_A;2871124 Wrote:
> ssd’s have a limited life span, a write intensive filesystem like
> btrfs can shorten the life span of an ssd (especially on older
> models) it was my understanding that the root was on an ssd drive
> with btrfs smartctl can check the state of ssd’s too not just
> magnetic drives smartctl can show the remaining lifetime of the ssd
> >
Code:

> > sudo smartctl -a /dev/sdX

> >
> will show the remaining lifetime of your ssd counting down from 100 to
> 0 (100 being a brand new and 0 being a dead ssd)
> http://tinyurl.com/oy2bbmq

The SSD is about 5 years old. Cost me $400 at the time. Here is the
report that gave me. I formatted the SSD with snapshots enabled. The
report doesn’t look too good. Can you give me an expert run down?

Hi
I would suggest asking Samsung on which attributes are important, but
with only not quite 3,000 power on hours after 5 years I would expect
that it will outlive your hardware… The report show no errors, your
wear level count is 5, in your case 1 per year?

As indicated in the other thread, I don’t have issues and use btrfs and
xfs file systems on four systems with SSD’s…

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
SLES 15 | GNOME Shell 3.26.2 | 4.12.14-23-default
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#3

what happens when you try to mount that partition from a live disk?

mount /dev/sda2 /mnt

if the hardware is fine with the amount of time you lost you could have done a clean reinstall