Igor Sobrado wrote: > In message <[EMAIL PROTECTED]>, John Pettitt writes: > >> Ronald L. Rosson Jr. wrote: >> >>> I currently have a net4801-60 running pfsense as my firewall. I am >>> looking for Hard drive recommendations for drives that can handle >>> being in the case of a 4801. Last one over heated in just under a year. >>> >> I gave up after drilling holes and installing a small fan the drive >> still didn't last (and it was an enterprise rated drive) - I switched to >> a CF based setup (m0n0wall) in the end. >> > > Overheating in just under a year? You know the Newton's law of cooling, > right? dQ/dt = C*(T_0-T_a) where T_0-T_a is the difference of temperature > between the object and its surroundings. How can a hard disk drive > (or any other object) be heating for a year? On the other hand, it is > an exponential decay... the drive will be fried in just a few hours! > > It is easier than all that... you need a drive that is rated for a > power-on hours (POH) of at least 700 hour/month. It is not a heat > related problem, it is a mechanical problem. > > What is the POH of that "enterprise" drive? perhaps four hours day? > I guess that "enterprise" is just a buzzword for some manufacturers. > > Get a real enterprise drive rated for 700 hour/month and this problem > is solved. For example, the Hitachi E7K100 drives (not the 7K100 ones). > Just look at the specs of the drive before buying. > > Igor. > > It was an E7K100 that failed. Started giving errors after just over a year. I don't think it was the temp (I did have a fan) but it still didn't last. I've had really bad experiences with laptop drives in general in 4801's now I use a CF with a FreeBSD boot and network mount file systems from a server on boxes that need it (or run 100% CF with m0n0wall in the case of my firewall).
John _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
