![]() ![]() Since the computer has been sitting in a corner unobtrusively serving up files for my home network, it has also collected three years of dust. The top layer is not particularly interesting, as they were deposited by gravity. The remainder, though, serve as indicator for airflow through the system and serves as a record of comparison against my intended airflow design for the box. ![]() The biggest lesson for me was that convection played a much smaller role than I had expected. Most of the dust indicating flow was proportional to the size of their air channels, there’s no visible sign of convection altering the flow. The most visible example is the ring of dust near the CPU fan on my front panel. I had expected it to be slightly teardrop-shaped to reflect heat rising, but it is almost a perfect circle. The most unexpected cluster of dust is on the auxiliary CPU power cable, running to the right side of the CPU fan alongside the USB wires. It appears most of the dust there were carried by air drawn in through the front panel gap. I hypothesize that, since it is a very narrow gap, airflow through that route is slowed and thus more likely to deposit dust on that cable bundle. There were a few minor smudgest of dust whose origins are a mystery. ![]() Two up top near the PSU fan, and one on the bottom at the rear end of the PSU. I’m curious what they were, but their fine dust particle size implies they were not a significant factor, so I’m content to leave them as mysteries for now. In order to preserve this information (all this dust will be disturbed and cleaned up when I disassemble this box) I shot a video for future reference: Maybe they’ll make sense for me in the future once I learn more about designing for airflow. I’ve decided to retire my current home server running FreeNAS. It has worked well for three trouble-free years and will likely continue working for a few more. But I have enough motivations for an upgrade beyond its current capabilities.įirst, I learned that FreeNAS has been making more and more use of its boot drive in its recent releases. Thus the boot drive is touched very little, minimizing wear on flash memory.Īt one point all the SATA ports on a FreeNAS box could be dedicated to storage devices, because FreeNAS itself is happy to boot from a USB flash drive, load to RAM, and run from there. However, FreeNAS documentation explained this has not been the case for several years. I have yet to run into any problems with the USB flash drives I’ve been using as mirrored boot volumes, but after three years of service I decided not to wait until problems crop up. When looking at a boot drive for a modern operating system, my default choice is to use a solid state drive. Copyright 2010, 2012 Adobe Systems Incorporated ( ), with Reserved Font Name ‘Source’. Source is a trademark of Adobe Systems Incorporated in the United States and/or other countries. SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007 This license is copied below, and is also available with a FAQ at: This Font Software is licensed under the SIL Open Font License, Version 1.1. The goals of the Open Font License (OFL) are to stimulate worldwide development of collaborative font projects, to support the font creation efforts of academic and linguistic communities, and to provide a free and open framework in which fonts may be shared and improved in partnership with others. The OFL allows the licensed fonts to be used, studied, modified and redistributed freely as long as they are not sold by themselves. The fonts, including any derivative works, can be bundled, embedded, redistributed and/or sold with any software provided that any reserved names are not used by derivative works. The fonts and derivatives, however, cannot be released under any other type of license. The requirement for fonts to remain under this license does not apply to any document created using the fonts or their derivatives. “Font Software” refers to the set of files released by the Copyright Holder(s) under this license and clearly marked as such. This may include source files, build scripts and documentation. ![]() “Reserved Font Name” refers to any names specified as such after the copyright statement(s). “Original Version” refers to the collection of Font Software components as distributed by the Copyright Holder(s). “Modified Version” refers to any derivative made by adding to, deleting, or substituting-in part or in whole-any of the components of the Original Version, by changing formats or by porting the Font Software to a new environment. “Author” refers to any designer, engineer, programmer, technical writer or other person who contributed to the Font Software. ![]()
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