Tag: ibm

Convenient IBM x3650 server PSU power distribution board (#P35)

On the occasion of selling the second PSU from the long dismantled IBM x3650M1 machine (part of the stack shown in #P23), a direct result of eBay getting greedy and increasing their commission from 10% of the item price to 11% including postage (WTF?) plus 35 cents per item, I need to publish this real quick. I still do have access to powerful 12V supplies that can operate my lightbox setup to take photos of the things are usually operating the lightbox, but it would be pretty inconvenient to do so ;)

So here’s another piece of Open Hardware – a custom PSU board for said IBM power supply. […]


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. […]


3.5″ Floppy disk drive benchmarking (WHL #57)

Yeah, you read that right. Time for some serious benchmarking of good old floppy drives. The type of benchmark that the interwebs have been waiting for.

In case you’re questioning my mental health right now: Nope, not affected by COVID-19 or the “quarantine” (that only keeps me from delivering a 2U server and causes people to act strange in the supermarkets). I’ve gone mad quite a long time ago. Probably a glitch during assembly.

Now, I got four bad boys here, revving their, umm, stepper drives?
Alps Electric DF354H(121G), 33wk 2007 – full size 3.5″ drive (5V 1000mA)
IBM FRU 06P5223 ASM 08K9835, Feb 2004, USB drive (5V 500mA)
Sony MPF820, Dec 2005, Slim drive (5V 750mA)
Teac FD-05HF, May (?) […]