_____ From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of Linda Kateley Sent: Friday, January 23, 2015 11:06 AM To: tclug-list at mn-linux.org Subject: Re: [tclug-list] SSD vs HDD for DIY security camera project On 1/22/15 8:15 PM, Chuck Cole wrote: _____ From: tclug-list-bounces at mn-linux.org [mailto:tclug-list-bounces at mn-linux.org] On Behalf Of Craig Smith Sent: Thursday, January 22, 2015 5:50 PM To: tclug-list at mn-linux.org Subject: Re: [tclug-list] SSD vs HDD for DIY security camera project Thanks to all who replied. The consensus was that SDD reliability wasn't a concern given my bandwidth, but performance wasn't worth the money. FWIW, I'm very happy with the Seagate ST1000LM0141 tb hybrid SSHD drive I put in my laptop. It's 4x the speed of "only rotating" and only about 15% higher price than a "rotating only" model. Nice, has anyone seen any "endurance" numbers for these hybrid drives? I have been watching these tests on ssds.. <http://techreport.com/review/27436/the-ssd-endurance-experiment-two-freakin g-petabytes> http://techreport.com/review/27436/the-ssd-endurance-experiment-two-freaking -petabytes But my instinct is that hybrid would actually have lower endurance. All of the heat/noise/vibration that comes off a hdd would seem not to be good for ssd. Or if it is not writing much into ssd part... ??? Linda (et al) I have some knowledge of these things technically and "was in the business" of both hi-rel and hard drives.. Noise and vibration aren't big issues since these chips don't have big ears and are mounted in quiet corners with good thermal conductivity to the outside as well as good air circulation inside. Temperature is not a big issue unless things get .. hotter than just warm. The effect of temperature on reliability is not bad until (slowly drops) until some critical temp is neared or exceeded. Going from memory and don't recall clearly, but I think that's about 50C which is likely much hotter than my Dell laptop hard drives ever get. At this "critical temp", the reliability curve drops as the 3rd or 5th power of the difference above the critical temp.. a very sharp decrease in reliability indeed, but insignificant below the critical temp. Other parts inside a hard drive have a tougher time, but the issues are very well understood and accounted for which is why hard drives are more reliable than most semiconductor memory (because board and box temps aren't as well-controlled). Seagate puts their 5 year guarantee on their SSHD drives. Chuck -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20150123/08711503/attachment.html>