Tag: battery backup

HP / HPE ProCurve 2910al-24G J9145A Switch teardown and shenanigans (WHL #108)

Earlier this year, I got my hands on a bunch of old HP switches, 20+4+x ports in 1U, in basic configuration without like fancy 10G addon cards. These were thrown out when my employer moved, but realistically, they should have been in the trash years ago. PCB date late 2008, component date more like mid-2009, so they were a solid 15 years in 24/7 operation. Good stuff.

So I had a peek. Like I always do :)

Hardware is of course ancient, the main processor is some (dual!) ARM11(56T2S) chip with ARMv6 architecture from like 2002. And while the thing has all the oomph it needs for 24/7 sustained 100% load on all ports with VLAN and filtering and sniffing, it’s doesn’t come lightly from a single ASIC like a modern switch would. […]

4th May 2025 5th May 2025 By Bzzz In No Comment

Supermicro 815 1U case 2,5″ HDD and RAID card battery holder (#P40)

New year, new hardware. Given space (in general, as well as in this specific case) is limited, old hardware has to go. So it’s about time post this 3D printed thingy, since the related hardware is about to be sold.

Now, the Supermicro 815 case, CSE815, SC815 or whatever prefix is en vogue nowadays, is one of those 1U pizza boxes. Shout-out to Supermicro for using webp images on their website already – but sticking to 261 x 222 px resolution for the full-size file.

Anyway, these come in two dozen varieties plus the EOL ones, and all of them have four 3.5″ HDD hotplug caddies in the front and some 1 to 3 card slots in the back, since it is a tiny case at 1U or 44mm height regardless of the 19″ width. […]

9th January 2022 9th January 2022 By Bzzz In No Comment