<div dir="ltr"><div><div><div><div>I've been running my MythTV system on an Intel X25-M SSD for several years with no issues. I have a rather large database and the SSD has sped up the operation of the system tremendously. I'll never go back. This drive was in use in a separate machine for a while before running in the MythTV system, but here's some statistics for the curious.<br><br><span style="font-family:monospace,monospace"> 9 Power_On_Hours 0x0002 100 100 000 Old_age Always - 46119<br> 12 Power_Cycle_Count 0x0002 100 100 000 Old_age Always - 1165<br>233 Media_Wearout_Indicator 0x0002 086 086 000 Old_age Always - 0<br>225 Host_Writes_32MiB 0x0000 199 199 000 Old_age Offline - 196422</span><br><br></div>That comes out to ~6 TB of writes over the lifetime of the drive. This is a snapshot of the same statistics from 2011 (about 5 years of use all in the MythTV system)<br><br><span style="font-family:monospace,monospace"> 9 Power_On_Hours 0x0002 100 100 000 Old_age Always - 11860<br> 12 Power_Cycle_Count 0x0002 100 100 000 Old_age Always - 1106<br>233 Media_Wearout_Indicator 0x0002 096 096 000 Old_age Always - 0<br>225 Host_Writes_32MiB 0x0000 200 200 000 Old_age Offline - 73719<br></span><br></div>That comes out to about 4 TB of writes in ~5 years of use. If you look at the Media_Wearout_Indicator, that starts at 100, and drops as the drive is written to. According to Intel's estimates, over the 5 years of use I've only used 10% of the drives write endurance (and those estimates are usually hugely conservative). By the time this system wears out the drive, it'll be long obsolete. As others have said, I wouldn't worry too much about write endurance of the SSD. The internal wear leveling will take care of most of the really problematic stuff. SSDs are much more resilient than running on an SD card or something like that.<br><br></div>For those interested, here is a great experiement showing the true endurance of a sampling of several SSDs: <a href="http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead">http://techreport.com/review/27909/the-ssd-endurance-experiment-theyre-all-dead</a><br><br></div>While the drives varied in endurance based on flash technologies (MLC vs TLC) and whether the controller implemented compression, they all easily passed 100TB worth of write without issue. The stalwarts actually made it to over 2,000TB.<br><div><div><div><br></div><div>--Dave<br></div><div><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 15, 2016 at 7:18 AM, <span dir="ltr"><<a href="mailto:mythtv@phipps-hutton.freeserve.co.uk" target="_blank">mythtv@phipps-hutton.freeserve.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
Quoting Calvin Dodge <<a href="mailto:caldodge@gmail.com" target="_blank">caldodge@gmail.com</a>>:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
For backups I do something like this, because it lets me keep multiple<br>
old version of files.<br>
<br>
1) designate an archive location<br>
2) Every day, make a copy of files in that location with "cp -al" (the<br>
-l means "make hard links of files, rather than copying them) to a new<br>
directory (my script creates on named YYYYMMDD). For me the location<br>
is /backups, with the rsync directory (see step 3) being<br>
/backups/latest, with daily directories like /backups/20160101,<br>
/backups/20160102, etc.<br>
3) rsync -a --delete source to destination. Since any files will be<br>
deleted and replaced, rather than changed, the old versions of such<br>
files will be safe in those daily directories.<br>
<br>
Calvin<br>
</blockquote>
<br></span>
I think you just reinvented rsnaphot<div class="HOEnZb"><div class="h5"><br>
<br>
<br>
<br>
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