[mythtv-users] mythtv-users Digest, Vol 204, Issue 32

[jam at tigger.ws]

> Doing that should allow you to record more programmes at the same
> time.  However, it also will use a *lot* more of the write endurance
> of the SSD.  So you will need to calculate how many more "terabytes
> written" it will use and see if the SSD's lifetime will allow you to
> use it that way.  It very likely will, but only if you intend to
> upgrade the box to a new SSD in 5 years or so.
> *************************


Simon there seems to be a lot of myth. (sic) on the subject

=== START OF INFORMATION SECTION ===
Device Model:     Samsung SSD 860 QVO 2TB
Serial Number:    S4CYNF0M302546M
LU WWN Device Id: 5 002538 e40e4fcfb
Firmware Version: RVQ01B6Q
User Capacity:    2,000,398,934,016 bytes [2.00 TB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      2.5 inches
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   ACS-4 T13/BSR INCITS 529 revision 5
SATA Version is:  SATA 3.2, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Mon Mar 23 20:14:07 2020 AWST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

...

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   098   098   000    Old_age   Always       -       5376
 12 Power_Cycle_Count       0x0032   099   099   000    Old_age   Always       -       34
177 Wear_Leveling_Count     0x0013   099   099   000    Pre-fail  Always       -       3
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 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0032   061   044   000    Old_age   Always       -       39
195 Hardware_ECC_Recovered  0x001a   200   200   000    Old_age   Always       -       0
199 UDMA_CRC_Error_Count    0x003e   100   100   000    Old_age   Always       -       0
235 Unknown_Attribute       0x0012   099   099   000    Old_age   Always       -       23
241 Total_LBAs_Written      0x0032   099   099   000    Old_age   Always       -       9162621562

I record about 5 hours per day.
1/2 year of 24/7 give me a life if 150 years projected

If you read pros-n-cons the concensus is a cron job once a day (heck once a week)

[sandypit] /store/jam [1005]% cat /etc/cron.weekly/trim
/sbin/fstrim /
/sbin/fstrim /store

James