Tag: airflow

NEW LSI 9300-16i 12Gbps SAS-3 PCIe x8 HBA P16 IT mode ZFS TrueNAS UNRAID (WHL #94)

Here’s a quick and simple one: Cooling advice for 16-port SAS cards.

The LSI 9300-16i cards have gotten surprisingly cheap over the past months. Dirt cheap, in fact. All-16 port SAS cards are traditionally pretty pricey, even though they are “just” two 8-port cards on one PCB. In the past 10, maybe 15 years, there was never a time when buying a 16-port card (used or new) was cheaper than buying two 8s. Sure, sometimes people needed a single-card solution (availability of PCIe slots, PCIe lanes, or space in general), but the usual recommendation for 16-bay chassis like my Supermicro 836 was always to buy 2×8 instead of 1×16. […]

The slightly more silent Ender 5 Plus (#E20F3)

Well, since the printer is running just fine, I used it to make some quality-of-life upgrades to it.
The bottom lid that covers PSU, all the mains wiring and the rest of the electronics has been removed and replaced by a 2 part print (due to size). Several reasons for that: a) Four of the six screws are covered by the additional aluminium frame, so it’s difficult to remove if properly fastened, b) if left unscrewed (which isn’t much of a load problem on the remaining two screws since it is sandwiched anyway), the ends of the large metal piece would be free to vibrate and resonate, c) the stock 40mm fan close to the driver board is terribly noisy and pointless in terms of air throughput, so I would have swapped it anyway. […]

YIHUA 850AD Digital Display Hot Air Desoldering Station Air Pump Can Adjust Temperature Heat Gun SMD Phone Soldering Station (WHL #85)

I got a (reasonably) big box from China!

Since changing jobs, I’m in the process of buying tools that I dearly miss – some of them are no longer easily accessible in the new place, some aren’t available at all, and some are so darn useful, I should have bought a unit for myself at home ages ago. A hot air station checks the last two boxes, since my regular 2000W hot air gun is certainly useful for like removing stickers or preheating boards, but temperature regulation clearly isn’t good enough for soldering. So…I bought a Yihua 850AD. […]

Random thoughts on Supermicro Risers, LSI LBAs, power supplies, ZFS and other fun server things (#P34)

With the failed 450W SFX power supply separated into a regular post last week, now’s the time to waffle on about what happened besides that.

Well, Solaris 11.4 (evil developer/home use licensing, so no current service packs) still uses minimal ashift as default instead of a fixed value of 12. ashift is the exponent of the power of 2 that is used as smallest assignable portion of data, so basically sector size. “Old” default is 9, as 2^9 is the well known 512 byte sector size that most old hard disks had as both logical and physical size, and which they reported as such. […]