[mythtv-users] Building a new MythTV Backend for 2022

[Stephen Worthington]

On Mon, 10 Jan 2022 07:31:26 +0800, you wrote:

>Jim myth here:
>SSD life is now so bad per cell (1000 or 10000 writes) ssd manufactures quote life in TBW.
>The TBW spec depends directly on ssd size.
>After 1/2 a year in use the projected life of my m2 is 40 years (regrettably more than mine :-)
>
>Model Number:                       Samsung SSD 970 EVO Plus 2TB
>Power On Hours:                     3,741
>Data Units Written:                 29,494,374 [15.1 TB]
>
>This is a cheap m2 (4 cell) at 600 TBW, you can get more expensive 1200 even 2400 TBW ssds.
>
>James

Another real life example:

Model Number:                       Samsung SSD 950 PRO 256GB
Namespace 1 Size/Capacity:          256,060,514,304 [256 GB]
Namespace 1 Utilization:            95,130,853,376 [95.1 GB]
Namespace 1 Formatted LBA Size:     512

SMART/Health Information (NVMe Log 0x02)
Critical Warning:                   0x00
Temperature:                        45 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    9%
Data Units Read:                    360,516,312 [184 TB]
Data Units Written:                 228,579,4 h42 [117 TB]
Host Read Commands:                 5,169,492,455
Host Write Commands:                2,354,847,145
Controller Busy Time:               11,596
Power Cycles:                       282
Power On Hours:                     48,823
Unsafe Shutdowns:                   133
Media and Data Integrity Errors:    0
Error Information Log Entries:      3,246

This is my main MythTV box - 5.5 years of 24/7 use on the SSD, and it
is showing 9% of lifetime writes used.  It is an older SSD and the Pro
model that has better lifetime, but it gets a lot of database
activity.  I am pretty happy that it will last for quite a long while
yet.

If you want to record to the SSD, then you are likely to hit the
lifetime write limit fairly rapidly.  But just running MythTV and
normal Linux on an SSD and there are no problems with lifetime.  You
still need to worry about it just dying unexpectedly, like any disk
drive (or any electronics, for that matter).