Category Archives: Hardware

Erasing your Hard Drive – Really

How to REALLY erase a hard drive by Robin Harris

Who Knew? Turns out there is a way to do a full erase on a hard drive already built into the firmware on the drive.

So what’s the magic?
Something called Secure Erase, a set of commands embedded in most ATA drives built since 2001. If this is so wonderful, why haven’t you heard of it before? Because it’s been disabled by most motherboard BIOSes.

Secure Erase is a loaded gun aimed right at all your data. And Murphy’s Law is still in force. But hey, if you’re smart enough to read Storage Bits, you’re smart enough to not play with Secure Erase until you need to.

I use Boot ‘N Nuke myself, which he also mentions.

American Power Conversion Support – Not

Same old story.

I’ve purchased thousands of dollars worth of APC uninterruptible power supplies over the years, I really like them, and consider this to be a default brand.

But two-three years after purchasing one, you need to consider replacing the batteries. The consequences of not replacing the battery smell bad; when the battery cells break down, circuits get shorted out, and you get a burning smell.

So…latest and greatest is one we purchased three years ago from Dell. Turns out it is an APC 2U rack mount Smart UPS, with a Dell part number. The “replace battery” light has gone on. After some investigation, the online manuals suggest that this happens two months or so before the battery needs to be replaced.

My first attempt to order a replacment from PC Connection fails. I got the 1400 VA size correct, but a 2U UPS has skinny little batteries that lie on their side, and they are actually enclosed in a sort of drawer that slides out of the UPS.

Like the good citizen I am, I attempt to use APC’s web-based tools to determine the correct part number and item. (When you are ordering batteries to be shipped, the cost adds up.) How is the the customer experience screwed up? Let me count the ways.

1. Even though this is a recent unit, the model number does not appear on the web site.
2. Even though the model number starts with DL (for Dell…get it?) the model number does not appear, although there are several other similar part numbers.
3. If you try to send an eMail, through the form, the eMail form bombs
4. If you try to to the “online chat”…the chat doesn’t work (nobody is at home…even during both normal business hours eastern time, as well as evening hours and weekends eastern time.
5. After you try the chat, and it says nobody is available to chat, the third time finally allowed me to send an eMail.
6. To India. The kind person was sorry, but he wasn’t able to answer my question, but he would send this to his supervisor.
7. Who didn’t exist, or didn’t write back, or whatever… (I waited a week).

The story does have a happy end, and a suggestion.
Avoid steps 1-8 ENTIRELY. Just call the battery replacement hotline at 1(800)300-7141. Within five minutes, a cheerful, competant person will tell you that the thing you are looking fir is called an RBC-24. with a suggested retail price of $259.95 (Although it did take a few minutes because he said “the system is slow today”.) Bingo.

Daylight Savings Time Change: Aftermath

With a stunningly cavalier attitude, my preparation for the daylight savings time issue consisted of checking the Microsoft web site, which led me to believe that as as long as everything was updated with patches, the change would be automatic. Today, checking for daylight savings issues, I had mixed results.

  • Unless you update and patch your Windows XP and Server 2003 machines, all bets are off. Even once they are updated, you may find yourself an hour later or early.
  • Workstations may take the time from a domain server, but if they don’t, you can reset them from the Time application in Control Panel, or by right-clicking the displayed time in the system tray.
  • Jeff Duntemann has a note about a free program that will do the update, and explains a bit more how the daylight-savings changes are stored in the registry.
  • As long as the Grandstream IP phones were set to account for daylight savings, they all flipped over without intervention. They update themselves from NIST.

Economics: Home-Grown vs. Full-Service VoIP Providers

While wallowing around getting the Asterisk/Trixbox up and running, I’ve been wondering about the economics of this especially when placed against other possible solutions. For example, Packet8 offers a business phone plan as a service; they provide you with phones, but everything else is provisioned over the internet. No server required.

Packet8 is a full service IP phone provider with both business and home phone plans. They offer a business service with a required minimum of three phones at $40.00/per extension. This includes unlimited calling throughout the U.S. and Canada. Calls to Germany are 2 cents per minute. So, the minimum would be $120.00 per month. They’ll sell you phones for about $99.00 each which is a good deal. If you would rather not buy the gear, and you can commit to a minimum two-year contract, they’ll give an option for $49.00 per month.

That covers the outbound calls and provides you with one inbound number. Additional inbound numbers, which can be virtual numbers, are $5.00 /month. They have a calculator on their site which gives you an idea of what the upfront and monthly costs will be.

If you wanted to start up with an Asterisk box, you would still have to buy IP phones. You can’t get a phone for much less than about $80.00, so that part of the equation is comparable.

Now, as I said with VoicePulse, there is a charge of roughly 2 cents per minute, and it all depends, on the amount of calling you are going to make. Comparing with the Packet8 rate, of $40.00 per extension per month, you would have to talk for thirty-three hours for a single extension to use up the $40.00 bucks. Further, with Packet8 the 5th or 8th phone costs as much as the first phone; there are no cost breaks as you scale up. They have a calculator on their web site that shows the upfront and monthly recurring costs.

Inbound virtual numbers with VoicePulse are $11.00 per month. Of course with Packet8, you don’t have a server; everything is done virtually over the internet connection.

After reading several reviews, (decidedly mixed), on Packet8, I’m thinking that the idea of the Asterisk box is still a good one. For one thing, using an Asterisk server allows you to maintain a hybrid system; a mixture of VoIP and connections to a landline. It also allows you to mix and match your own IP phones and soft phones. And, for me at least, the monthly charges are negligible. I can add as many extensions as I want, for just the cost of the phone hardware.

More Links:

Here’s an older review of the VoicePulse regular (non-Asterisk) service.

Test your network for VoIP. This service will place test calls between your location nd several cities including Sydney, Vienna, Boston, and Montreal.

A similar test for videoconferencing.

Finally, I ran into this great article about how to rewire the phone wiring in your home or business to use VoIP. Many systems, like the home service of VoicePulse, Packet8 or Vonange assume that you want to connect a single telephone to their servcie. This article explains how to work around that problem, and includes a great deal of general information about phone wiring. Get your dykes and screwdrivers ready!

Desktop Hardware Costs Going Toward Zero?

Prompted by an entry over on Jeff Dunteman’s Contrapositive Diary, (scroll down past the fluffy dogs…) I have been I’ve been watching with interest some eBay sales in the $250, range for Dell Optiplexes. I just saw an SX270 Pentium 4 3.2 Mhz with 512 K of RAM and Window XP Professional Service Pack 2 go for $255.00. This is a small notebook sized unit. Even with $40.00 shipping it still seems to be pretty interesting. As Jeff mentions, these were going for $1800 or more just a couple years ago. Little guys like these are ideal for mini servers or media center PCs.

Other low-end machines seem to be going for $150.00 and under. Many times you’ll see that they have things like 10 gigabyte hard drives; you have to wonder if perhaps the parts have been diddled. (a technical term for “swapped out with junk lying around on the bench…”) But, say, you find one with a 2.4Ghz processor, and 256Kb or maybe 512Kb of RAM and a 20 gig hard drive. Install kubuntu for an operating system and desktop applications. Total cost $300.00?

For the past few years, PC hardware has been relatively static. Each new generation of hardware brought only incremental performance improvements. I’m still using 2.8Ghz processors in my office machines (both refurbs as is my Dell laptop), and servers are using slower processors. I’d recommend avoiding the Intel Celeron processors, but Pentium 4s at 2.4Ghz and up still have legs, especially with Linux.

The new Windows Vista wants to see more of everything; duel core processors and two gigs of RAM will help it on its way. But that means recent hardware that led up to Vista is both a bargain, and viable for the medium term, when matched with Windows XP Service Pack 2. If I was looking to round out my office with a couple new machines, and I had more time than money, I’d check eBay and the Dell Outlet for refurbished desktop machines. Look at the Optiplex line especially.