The SSD Decoder Ring

I occasionally get a question about an SSD, usually when one goes on sale somewhere. Inevitably, I’ll get an e-mail message with a URL and the words “any good?” with it. Often I’ll know off the top of my head, but depending on whose name is on the drive, I may not.

But here’s a cheatsheet with all the major drives on the market, and who makes the controller in them.
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I rebuilt a Dell Dimension 4100 last night

So, I rebuilt a Dell Dimension 4100 last night. I didn’t make any hardware changes other than replacing the Western Digital hard drive inside, which was on its last legs.

Along the way, I learned a few things.I won’t say much about the WD drive except to say it’s the most recent in a long line of bad experiences I’ve had with the brand. I don’t know anything about current WD drives. But this one was loud and shrill, Windows bluescreened when I tried to install to it, and when I tried to run SpinRite on it, it said it would take 140 hours to test. A drive that size (20GB) should take 8-10.

In its defense, that drive was five years old. But I replaced it with a Maxtor drive that’s almost eight years old. SpinRite processed that Maxtor in 3 hours and found nothing worth commenting about. (Just because SpinRite didn’t say anything doesn’t necessarily mean it didn’t do anything.)

The Dell Dimension 4100 does have a proprietary power supply (although it looks like an ATX). If you work on Dells, I suggest bookmarking PC Power and Cooling’s Dell cheatsheet. PCP&C power supplies are expensive, but they are reliable, and their prices are comparable to what Dell would charge for a replacement and they are higher quality than what you would get from Dell–assuming Dell will even sell you the part (they’re in the business of selling computers, not parts). I believe newer Dells use standard power supplies.

If you buy a Micron, you can punch in a serial number and get drivers for the machine. With a Dell, you just get guesses based on the options that were available for the machine.

Download the chipset drivers and other low-level stuff from Dell’s support site. Windows 2000 didn’t completely recognize the system’s Intel i815 chipset and I get better performance afterward.

Nlite offers a lot of promise–automating the Windows install, removing components, etc.–but I had trouble getting it to work with the OS recovery CDs I had. I didn’t have enough time (or blank CDs) to figure out how to get it to work for me. I’m sure it works better with a plain old Windows 2000 Workstation CD, but of course I can’t find mine. But if you have a CD that works with it, it’s nice even if you don’t remove the stuff Microsoft doesn’t let you remove, since it provides a nice interface for slipstreaming service packs and hotfixes and removing all of the prompts during installation.

The tricks in Windows 2000 with 32MB of RAM work pretty nicely, even when you have more than 32 megs. Of course, if you’re ruthless with Nlite and can get it to work for you, you probably don’t need that bag of tricks.

I didn’t try to install it without Internet Explorer. I’d love to try that sometime but I didn’t have time for that. At least disabling Active Desktop (see the link in the paragraph above) gives most of the benefit you would get from smiting IE.

The quality of the Dell hardware is reasonable. It didn’t floor me, but I didn’t see anything that made me cry either.

A model railroad scale conversion chart

Plans in model railroad books and magazines are often in a different scale from your favorite. Having a model railroad scale conversion chart helps.

I’m into O scale and the rest of the world, it usually seems, is not. Dimensions for published plans are almost always sized to HO scale, or even S scale of all things. Of course, after A. C. Gilbert imploded in 1967 and took American Flyer with it, it seemed like the “S” is S scale stood for “scratchbuild,” because building it yourself was the only way you were going to get anything, so I guess that’s fair.

Here’s a cheatsheet you can use to convert measurements from one scale to another.

Assumptions: O scale is 1:48, G scale is 1:22.5. If you use a different measurement for either scale, I’m sorry. This won’t be much use to you.

G Scale O Scale S Scale OO Scale HO Scale TT Scale N Scale Z Scale
G Scale 213% 284% 339% 386% 533% 711% 977%
O Scale 47% 133% 158% 181% 250% 333% 458%
S Scale 35% 75% 119% 136% 188% 211% 289%
OO Scale 30% 63% 84% 115% 158% 211% 289%
HO Scale 26% 55% 73% 87% 138% 184% 253%
TT Scale 19% 40% 53% 63% 73% 133% 183%
N Scale 14% 30% 40% 48% 54% 75% 138%
Z Scale 10% 22% 29% 35% 40% 55% 73%

Find your scale in the table along the top. Then scroll down to the desired scale and find out the factor you need to enlarge or reduce. So, if, say, I have HO scale plans I want to enlarge to O scale, I run across the top to HO, then down to O scale, and see that I need to enlarge the plans to 181%. If I have O scale plans I want to reduce to S scale, I run across the top to O and down to S, and see I need to reduce the plans to 75%.

You can also do this if a building you want exists in kit form for a different scale. Measure it. Then do the math based on the chart to figure out what size to build everything for your scale of choice.

Further reading

I hope you find this model railroad scale conversion chart useful.

On a somewhat related note, if you’re unsure what scale something is, here’s how to figure that out before you convert it. You might also find my cross-hobby scale conversion helpful.

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