[mythtv-users] 3TB...poof

[James Linder]

> On 20 Mar 2019, at 11:19 pm, mythtv-users-request at mythtv.org wrote:
> 
>> As the cost of flash drops it looks more and more attractive. You *can* get 4T samsung SSDs.
> 
> Except that when you run the figures for a MythTV recording drive,
> even a 4 TByte SSD will get worn out pretty rapidly.  That is for the
> level of recording I do though, which is pretty heavy.  When huge SSDs
> get down in price enough that you can afford to replace them every 4-5
> years, then they will be the right choice for MythTV.  But we are not
> there yet.


Actually Stephen that is not true. Shock horror amazement (me not you):

[sandypit] /home/jam [1002]% !459
sudo /usr/sbin/smartctl -A /dev/sda
[sudo] password for root:
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.12.14-lp150.12.45-default] (SUSE RPM)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
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       -       1956
 12 Power_Cycle_Count       0x0032   099   099   000    Old_age   Always       -       25
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   062   048   000    Old_age   Always       -       38
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       -       12
241 Total_LBAs_Written      0x0032   099   099   000    Old_age   Always       -       3425086849

Recording 1/2 doz shows / day on a samsung 1T disk with a total write life of 600T

Based on 3 months usage 
that’s 1.7T yielding a lifetime of 86 years.

4T cheapest 4 bit mlc is 2x that.

James