How to understand by smartctl if the disk is dead?

Question

linux

There is a 120GB Mushkin disk. MKNSSDAT120GB-DX
Linux is loaded on it only in the console, some messages slip that it is impossible to write something to the log, because. not enough space. Naturally, there are many places.
Opened the disk in smartmontools. The output is below. On the Internet, they write that the indicators may differ from manufacturer to manufacturer, and that even if the parameter goes to zero, then this is not a fact that the disk has died.
1. Tell me how to interpret the parameters in my output, which attribute to look at?
2. The disk is 2.5 years old. Is this normal for an ssd?

smartctl 6.3 2014-07-26 r3976 [x86_64-linux-3.19.0-2-desktop] (SUSE RPM)
Copyright (C) 2002-14, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model:     MKNSSDAT120GB-DX
Serial Number:    MKN1249A0000147294
LU WWN Device Id: 0 000120 000000000
Firmware Version: 504ABBF0
User Capacity:    120,034,123,776 bytes [120 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ATA8-ACS, ACS-2 T13/2015-D revision 3
SATA Version is:  SATA 3.0, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is:    Wed Feb 25 00:22:40 2015 EST
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: 		(    0) seconds.
Offline data collection
capabilities: 			 (0x7b) SMART execute Offline immediate.
          Auto Offline data collection on/off support.
          Suspend 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: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 (  48) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x0021)	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
  1 Raw_Read_Error_Rate     0x000f   100   100   050    Pre-fail  Always       -       4296042
  5 Reallocated_Sector_Ct   0x0033   100   100   003    Pre-fail  Always       -       0
  9 Power_On_Hours          0x0032   086   086   000    Old_age   Always       -       12790 (218 18 0)
 12 Power_Cycle_Count       0x0032   099   099   000    Old_age   Always       -       1530
171 Unknown_Attribute       0x0032   000   000   000    Old_age   Always       -       0
172 Unknown_Attribute       0x0032   000   000   000    Old_age   Always       -       0
174 Unknown_Attribute       0x0030   000   000   000    Old_age   Offline      -       91
177 Wear_Leveling_Count     0x0000   000   000   000    Old_age   Offline      -       4
181 Program_Fail_Cnt_Total  0x0032   000   000   000    Old_age   Always       -       0
182 Erase_Fail_Count_Total  0x0032   000   000   000    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
194 Temperature_Celsius     0x0022   038   071   000    Old_age   Always       -       38 (Min/Max 11/71)
195 Hardware_ECC_Recovered  0x001c   120   120   000    Old_age   Offline      -       4296042
196 Reallocated_Event_Count 0x0033   100   100   003    Pre-fail  Always       -       0
201 Unknown_SSD_Attribute   0x001c   120   120   000    Old_age   Offline      -       4296042
204 Soft_ECC_Correction     0x001c   120   120   000    Old_age   Offline      -       4296042
230 Unknown_SSD_Attribute   0x0013   100   100   000    Pre-fail  Always       -       100
231 Temperature_Celsius     0x0013   100   100   010    Pre-fail  Always       -       0
233 Media_Wearout_Indicator 0x0000   000   000   000    Old_age   Offline      -       9121
234 Unknown_Attribute       0x0032   000   000   000    Old_age   Always       -       5393
241 Total_LBAs_Written      0x0032   000   000   000    Old_age   Always       -       5393
242 Total_LBAs_Read         0x0032   000   000   000    Old_age   Always       -       2879

SMART Error Log not supported

SMART Self-test Log not supported

SMART Selective self-test log data structure revision number 0
Note: revision number not 1 implies that no selective self-test has ever been run
 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.

Answer 1

Unfortunately, not lately. Most recently, several disks rained down with bad blocks, although everything was in order according to SMART.
You most likely have problems not in the disk but in the file system. Try to check it

Answer 2

> something in the log, because not enough space. Naturally, there are many places.
Most likely you have some process holding a large remote file. By df, you can see that there seems to be a place, but there is no place.
sudo lsof |grep deleted
look, you might see a fat one.

Answer 3

The main thing is that the VALUE value does not correspond to TRESH in points where TYPE = Pre-fail.
But judging by the fact that some of the parameters are not defined at all, this is already bad, in my opinion.

171 Unknown_Attribute       0x0032   000   000   000    Old_age   Always       -       0
172 Unknown_Attribute       0x0032   000   000   000    Old_age   Always       -       0
174 Unknown_Attribute       0x0030   000   000   000    Old_age   Offline      -       91