[mythtv-users] Backend on a Dell Optiplex 7040

[Mark Wedel]

On 6/19/23 23:14, Ian Evans wrote:
> On Tue, Jun 20, 2023, 1:32 a.m. James <jam at tigger.ws <mailto:jam at tigger.ws>> wrote:

> 
> I guess he could always replace the SSD in the drive bracket with a 2.5 inch notebook spinning rust drive. There is an M.2 slot he could use for boot

  Just replacing a 256 GB SSD with a 2 TB SSD would give you 8 times the life (since it is 8 times longer), though depending on what memory technologies are being used, this might not be quite true.

  It also depends on how much recording you do.  If only a few programs/week (and not much live TV watching), I wouldn't be as concerned about lifetime compared to a few programs/day.

  On the low count, a SSD is probably good for at least 100 write cycles - so for a 2 TB drive, that is 200 TB of recording

  SSDs are advised against for security cameras, because those are recording a lot of data per day and will fairly quickly burn through capacity.

  Also keep in mind expected life time - if you plan to replace the computer/drive in a few years, you may end up replacing it before you ever get near write lifetime - 200 TB = .2 TB/day for 1000 days, or 200 GB/day.  So if we go back to that 256 GB drive, that would get you 25 GB/day for 1000 days, presuming the low side of 100 write cycles.

  Whenever my 2 TB hitachi HDDs fail (70,000 power on hours at this point, eg 8 years),  I'll likely replace them with SSDs - I just don't record stuff often enough that I'm concerned about that killing the life of the drives.

  What is concerning is that my root/home drive (NVME) with about 1 year of use has written ~90 TB of data (1 TB drive).  Not sure what is doing all of that - by snapshots, I can see ~150 MB/day for root filesystem, ~200 MB for home - that is well short of 240 GB/day that would account for that much data being written.  So I'm not really sure what is writing all of that data.