Got myself an XH-M229 board so I could repurpose an old ATX power supply. Apparently it’s suitable to use 1 amp fuses. Gonna send the 12V rail into my RD6006W bench power supply.
Author Archives: Jay Jay
ZFS decuplication
Checking ashift on existing pools
Today I found: Checking ashift on existing pools. In summary:
# zpool get all | grep ashift # zpool get all | less # zdb -C | grep ashift # zdb -C | less # zdb -U /etc/zfs/zpool.cache | less
Per ZFS 101—Understanding ZFS storage and performance you *really* want to make sure your ashift value is aligned with your disk’s sector size. ashift=9 for 512; ashift=12 for 4096; I’ve heard some SSDs can be 8K, but I haven’t been able to confirm for my own disks.
Controlling RGB LEDs With Only the Powerlines: Anatomy of a Christmas Light String
This on Hacker News today: Controlling RGB LEDs With Only the Powerlines: Anatomy of a Christmas Light String.
How FreeDOS Grew Up and Became a Modern DOS
An article about the history of FreeDOS: How FreeDOS Grew Up and Became a Modern DOS.
Computer Science courses with video lectures
This is pretty awesome: Computer Science courses with video lectures.
300in1 diodes
I made some notes about my 300in1 diodes. I have switching diodes, rectifier diodes, zener diodes, and germanium diodes. One thing to note is that germanium diodes are supposed to have a forward voltage of 300mV. One diode I thought was a germanium diode (it was clear with two black bands but no other markings) had a forward voltage of 600mV, I’m not sure what’s up with that, so I put it in my “unknown parts” drawer.
Doom 3 locker codes
These are pretty good Doom 3 locker codes.
UPS batteries from Battery World
Note to self: my mate Mitchell from Battery World, Penrith hooked me up with new batteries for my PowerShield Defender 1200VA systems: ‘LOVE UPS’ and ‘ORAC UPS’. The batteries have a 12 month warranty if there turns out to be problems.
RisingLight
RisingLight is an OLAP database system for educational purposes: RisingLight. If I had more time I would check this out.