* HP Servers (also Dell, IBM, etc.) - I do server work for a living, and use mainly HP servers. I think if you loaded one of these up with 10K or 15K SAS disks, you would have an issue. I think people get away with this because they use 5400RPM consumer drives that produce less heat. And unless you used an elaborate fan controller with temp sensors and lots of PWM fans, it would be difficult to get the same kind of demand-based fan control you might get on a commercial server. * Fan noise - I know you can use the 120MM fan mod, almost seems better to go with the JBOD external expander enclosure because it does away with the midplane altogether, and it looks like you have enough space to put some larger fans on the back. * Management - the backplanes don't have things like SES2 or similar, how important is this? I think the higher end RAID hardware/software will tell you things like drive temperature and SMART, but is this a big problem? Is this true? How do you make sure you pull the right drive when one fails? * Drive status - it looks as though you only get power and drive activity, and not anything for indicating a failed drive. I guess you are best to go with RAID6+HS with consumer drives no matter what. But I also wonder about vibration of the drives and so forth, I see there are some articles on STH about drive reliability. * Tray quality - I see various opinions on this, seems like the quality is "good enough" as long as you are careful with them. But there are a few issues that give me pause that maybe people can help me with: (I do realize you get what you pay for) Hello, I am very tempted by the Norco 24-drive case.
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