Ah yes - did something almost the same on my Qube 3, except mine is running Debian Jessie....It's old, but not that old.
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The kernel has been updated to 3.4.8 - was working on a 4.17 kernel earlier but it ran into a build issue (related to Debian bug 848066) so it was back to the 3.4.8 for now.
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Whats inside? 450MHz K6-3+ (Sharptooth) - mostly so I can manage the power consumption with clock-back on idle, 1GB of PC100/133, 2 NatSemi FastE NICs, and a Promise SATAII dual port controller (yeah, I know, good old 32 bit PCI is not enough to run a single SATA150 port, much less 2 SATA300...of course, dealing with hard drives, it's plenty enough).
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I did swap out the original Delta fan for a SileX 60mm fan with rubber mountings that ran much quieter, and the primary drive on IDE0 was replaced by an 8GB industrial IDE44 drive, and then by an IDE44-to-SD adapter simply because digging a bad kernel build out and fixing it on my linux machines take much longer with the industrial IDE (I'll need an IDE-to-USB adapter) than with the SD.
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What's the long term plan for it? Probably not much - the machine was long replaced by my HP MicroServer G7/N40L (which is currently my RAIDz10 array), which in itself is old enough to be considered retro. The computing end is already supplemented by a Ryzen embedded box on top. I could toss a few old SATA1 drives in there to make it a ghetto NAS, but eeeeeh, why bother.
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