How to map disk drive names in Device Manager to volume letters like C: E: F: G:

When you go into Device Manager and click on Disk drives you see entries like

Maxtor 7Y250M0



[FYI all those “0” are zeros -MM]

But it doesnt tell what driver letter, eg C:, D:, E:, F: etc it is.

There happens to be an excellent question and answer about this (by the same person) on

The short answer is there’s a “Volumes” tab in disk drive device properties.

The long answer is:

  1. Once you’re already in Device Manager with Disk drives expanded,
  2. Right-click on a disk drive device and select “Properties”.
  3. Click the “Volumes” tab
  4. Click the “Populate” button.
  5. The drive letter like F: should appear under the “Volume” column in the lower half of the dialogue box.

That’s the drive letter for that device.

Or, you can do it from “My Computer” or “Windows Explorer” :

  1. Double click on “My Computer” or Start -> Programs -> Windows Explorer or Start -> Run -> explorer
  2. Navigate to “My Computer” or “Computer” (showing the list of drives with their drive letters)
  3. Right-click on a drive (it doesnt matter which one), and select “Properties”
  4. Select “Hardware” tab
  5. Click on one of the drive device names (you have to do this for every name, in turn)
  6. Click the “Properties” button (yes you’re now in the Properties of the Properties–welcome to Windows)
  7. Click the “Volumes” tab
  8. Click the “Populate” button.
  9. The drive letter like F: should appear under the “Volume” column in the lower half of the dialogue box.

If you’re trying to map a particular drive letter, like C: to its device name, you will have to keep repeating these steps from step 5, trial and error fashion, for each drive device name until you find the one that has volume C:.

I’ll post pictures here of each step if i get the time.

For reference, “jabloomf’s” concise posts from :


jabloomf asked on 2/12/2010 3:57:32 AM

Matching drive Letter with physical drive

I know there must be a simple way of doing this. I have 5 SATA drives on my Windows 7 system. The boot drive (C:) and another drive (E:) are 150 GB WD Raptors. The two Raptors are connected to the mobo’s [motherboard’s] SATA1 and SATA4. But how can I tell whether the C: drive is on either SATA1 or SATA4? All in can see in the Device Manager is the drive S/Ns. In disk management, all I can see are the drive letters and the drive type, but not the S/N. I know that I could power down, unplug one of the drives from the mobo and see what happens when I reboot, but I was wondering if there was some way to find out from the OS.

The only other way I decided that it might be possible to find out is to use the BIOS to examine the S/Ns and try booting from each drive using the BIOS and see what happens.

And his answer:


jabloomf replied on

Thanks, but I figured it out a different way, in case anyone is interested. You click on the drive Properties from the Windows Explorer. Then you click on the Hardware tab and click on the drive caption. For a 150 GB WD Raptor the caption (or name) looks something like:

WDC WD1500AHFD000RAR4 ATA Device

Then click the Properties button and then the Volumes tab. Then populate the Volumes and you have a match of the drive caption and the drive letters. The drive caption is also shown in the BIOS, so you can confirm that you’ve matched the correct physical drive with both the drive letters and the SATA port.


tablet vs laptop

From: by

Tony makes the point that the data on sales volume is skewed by low-end, small tablets.

For $200, that same consumer can get a tablet with a sharper display and higher pixel density. The processor and RAM may seem similar on paper, but the ARM architecture, and a mobile OS like Android or iOS will deliver blazing performance instead of lagging and frustration. The $200 tablet is lighter, thinner, and can run all day on a single charge.

Granted, it’s not entirely an apples-to-apples comparison. The netbook probably has a larger storage capacity, and it’s capable of running standard Windows software. But, the tablet can do email, instant messaging, Web, social networking, and play games—which sums up about 90-plus percent of what most people need to do from a mobile device.

It’s easy to see why (cheap) tablets will beat netbooks.



There is some cannibalization of laptop sales. The simple reality is that many of the things people need to do can be done just as well or better from a tablet. And, even if we’re talking about the 9 and 10 inch tablets that average in the $500 and $600 range, it’s a more versatile, less expensive alternative to $1,000-plus notebooks.



tablets in general may chip away at overall notebook sales, but businesses still need powerful, capable laptops.

Tony makes the point that a tablet is just a different style of PC, and so old-style PCs and new-style tablets will eventually merge and we’ll just call them all “the PC market.”



cmos battery code

You may have seen a “CR2032” cmos battery. The “2032” is broken out into “20” and “32” and means 20mm diameter and 3.2mm thick.  Similarly, a “2025” is 20mm diameter and 2.5mm thick.  So a 2025 is thinner than a 2032.  In the same way, a “1220” is 12mm diameter and 2.0mm thick, so smaller and thinner than both .

A “CR” means primary cell; an “ML” means secondary cell.

Intel’s list of hw tools (most 3rd party)


Feature/Area Tool/Software/Site Description
Processor Intel® Processor Diagnostic Tool The Intel Processor Diagnostic Tool is a free application used to verify the functionality of an Intel microprocessor. The diagnostic checks for brand identification, verifies the processor operating frequency, tests specific processor features and performs a stress test on the processor.
Processor Intel® Processor Identification Utility The Intel® Processor Identification Utility is provided by Intel to enable customers to identify the brand, features, package, intended frequencies and actual operating frequencies of their Intel microprocessor. You can also use the utility to discern whether or not an Intel® Processor is being operated above its Intel rated frequency.
Processor PerfMonitor* PerfMonitor is a processor performance monitoring tool that allows you to track the frequency of 4 events chosen in a set of model-specific list. It can be used to identify the performance bottlenecks of a system, or to monitor a program for cache-miss rate or mis-predicted branches. PerfMonitor can also be used as a hardware-level CPU comparison tool, comparing the key parameters of different CPUs running the same benchmark.
Processor Tmonitor* TMonitor displays the active clock of each individual core of the processor. A very high refresh rate (20 times per second) allows you to visualize the smallest clock variation in real time. TMonitor is able to detect mechanisms such as Intel® Turbo Boost Technology, and therefore allows you to clearly visualize its effect as the processor is working.
Processor, memory CPU-Z* CPU-Z is a freeware application that gathers information on some of the main devices of your system.
Memory Memtest86+* A free, stand-alone memory testing program.
Memory Windows Memory Diagnostic* A free memory test tool provided by Microsoft*. Very similar to other memory testing programs, Windows Memory Diagnostic performs a series of extensive tests to determine what, if anything, is wrong with your computer memory.
Overclocking* is an online community which includes forums, reviews, and articles related to overclocking.
Overclocking* is an online community which includes forums, reviews, and articles related to overclocking.
Overclocking Prime95* A useful stability testing program for overclockers.
Complete system AIDA64* A complete PC diagnostics software utility that assists you while installing, optimizing or troubleshooting your computer by providing all the information you can think of about your system, from hardware devices and installed drivers to operating system security and stability metrics.
Complete system PC Wizard 2010* A utility designed for detection of hardware; also analyzes and benchmarks hardware, such as CPU performance, cache performance, RAM performance, hard disk performance, CD/DVD-ROM performance, removable/flash media performance, video performance, and MP3 compression performance.
Complete system HWMonitor* HWMonitor is a hardware monitoring program that reads PC systems main health sensors: voltages, temperatures, fans speed. The program handles the most common sensor chips, like ITE* IT87 series, most Winbond* ICs, and others. In addition, it can read modern CPUs on-die core thermal sensors, as well has hard drives temperature via S.M.A.R.T, and video card GPU temperature.
Complete system BurnIn Test* A software tool that allows all the major sub-systems of a computer to be simultaneously stress tested for endurance, reliability and stability.
Complete system WinSAT* The Windows System Assessment Tool (WinSAT) assesses the performance characteristics and capabilities of a computer. Developers can use this API to develop software that can access the performance and capability information of a computer to determine the optimal application settings based on that computer’s performance capabilities.
Complete system SpeedFan* SpeedFan monitors voltages, fan speeds and temperatures in computers with hardware monitor chips. It also can access S.M.A.R.T. info and show hard disk temperatures.
Complete system Open HW Monitor* Open Hardware Monitor is a free open source application that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer. It supports most hardware monitoring chips found on today’s motherboards.
Complete system HWiNFO32* HWiNFO32 is a hardware information and diagnostic tool supporting latest components, industry technologies and standards. It is designed to collect and present the maximum amount of information possible about a computer’s hardware.
Complete system Hmonitor* Hardware sensors monitor utilizes sensor chips on smart motherboards to track system and CPU core temperatures, voltages and cooling fans. Hmonitor continually monitors the various parameters.
Complete system PerformanceTest* PassMark PerformanceTest allows you to objectively benchmark a PC using a variety of different speed tests and compare the results to other computers.
Complete system Speccy* Speccy gives you detailed statistics on every piece of hardware in your computer, including CPU, motherboard, RAM, graphics cards, hard disks, optical drives, and audio support. Additionally, Speccy adds the temperatures of the different components.
Graphics 3DMark* Benchmark programs that run intense tests that strain even the latest hardware. By comparing your benchmark score with millions of others you can find problems with hardware and software.
Graphics MonitorTest* Allows you to investigate the quality and performance of your computer monitor or LCD flat panel screen.
Audio SoundCheck* Allows you to test your PC sound card, speakers and microphone; verify that your sound card can record and playback sounds at various audio sample rates; and check the capability of your speakers to reproduce the highest and lowest frequencies.
Hard drive Intel® Solid-State Drive Toolbox Tools and diagnostics for Intel® Solid-State Drives.
Hard drive Seagate SeaTools* A comprehensive, easy-to-use diagnostic tool that helps you quickly determine the condition of the disk drive in your external hard drive, desktop or laptop computer. It includes several tests that will examine the physical media on your Seagate or Maxtor disk drive and any other non-Seagate disk drive.
Wireless WirelessMon* Allows you to monitor the status of wireless WiFi adapter(s) and gather information about nearby wireless access points and hot spots in real time.
Keyboard KeyboardTest* Checks that all the keys on a keyboard are functioning correctly, checks the keyboard LEDs, looks at the internal scan codes being generated by the keyboard and measures typing speed.
USB USB 2.0 Loopback* Active loopback plugs are the quickest, most effective way to verify that a PC’s USB ports are working correctly.