Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Comment Bletchley Park is a ruin (Score 1) 99

I visited part of Bletchley Park in the late 2000s and it was a ruin. The guard at the gate house said they are very much in need of money. The buildings were falling down.

Sure, it is a site of historical importance, but even the Enigma-cracking computers like the esteemed Alan Turing's bombe were dismantled and scrapped decades ago, and the hundreds of subsequent generations which won the war of the Atlantic are all over the world in both their original form, as replicas, and as computer emulations.

Comment Re:Amazing how times change. (Score 1) 444

I just toileted three Seagate Barracuda drives of varying vintage, from three to five years old. I don't understand why my Western Digital, Samsung, Hitachi, and Toshiba drives don't crap out so soon.

In particular, Samsung F1 drives just flat out refuse to die, so why isn't any of that rubbing off on new owner Seagate?

Comment Re:Hitachi Deathstar is the most reliable now? (Score 1) 444

Yes. The IBM "Pixie Dust" technology wasn't quite ready or understood well enough to be manufactured in a repeatable, reliable way.

Though sometimes quoted that this was the reason IBM exited the hard drive manufacturing business, it was a minor factor at best. IBM had been seeking a buyer for that business unit well before Pixie Dust spawned the annoying DeskStar "DeathStar" jokes.

Comment Consumer-grade is not for you (Score 1) 444

This study is interesting, but consumer-grade hard drives are exactly not supposed to be used in this way. I worked on server-grade hard drives (also 3.5") that were going seven years old without spinning down and getting slammed hard all day, every day. The failure rate was less than 1% for all brands in seven years' time in an array that filled two server racks. The 2.5" drives are even better.

Vibrations causing failure? Brother label makers? Isn't this the online storage vendor that was bragging about shucking portable hard drives to get around a soft embargo imposed during the Indonesian flood crisis?

Comment Re:Z-Wave (Score 1) 336

This is true, but most contemporary systems aren't SWM (which is a DirecTV term). DISH Network has a similar band-stacking technology but it's also rather rare and expensive and only found on relatively new installations. It's nice to see the major satellite TV providers have embraced band-stacking so we don't need so many cables and complicated switches anymore, even if it's at a premium price.

Comment Re:Z-Wave (Score 2) 336

Yes, coaxial cable is absolutely required. Don't skimp. It has more bandwidth and it's 100% reliable.

When I renovated the basement, I bought a spool of quad-shield dual-line RG-6 cable with copper core and ran it to every wall in the basement and to every wall on the main floor. Then I ran a pair to every bedroom since I was able to use a riser to the attic. Then used a high-frequency splitter in the basement. This is how you get whole-house DVR working properly.

You *want* to have RG-6 copper-core cable to each point in addition to ethernet. You need it for all home television service. No matter cable, FiOS/fiber, U-verse, or IP-TV, they all use MoCa to communicate with the other TVs and you want to have that. Satellite also needs two cables to each point.

Plus your home DVR solution, whether cable, satellite, will use the RG-6 cable with MoCa to distribute the video to your TVs. The MoCa connection will be the only one that will allow you to reliably distribute non-buffered HDTV to all televisions in the house from a whole-house DVR. FiOS, for one, requires it.

RG-6 is not for analog--it's for modern televisions of all types.

Comment Hard wiring to every room with RS-485, RS-422 (Score 2) 336

Since you have the grand opportunity to design your house before it's built, you want to use the best home automation protocol available. Hard wiring to every room with the RS-485, RS-422, TIA-485-A family is the best long-term bet. This will always work now and in the future. It won't be affected by obsolescence, RF interference, or electromagnetic interference.

You can extend your house later with the toy protocols later like Zwave, INSTEON, Zigbee, Bluetooth 4.0/Smart/WiBree, or whatever. For the core home automation where reliability is required, like lights, doors, alarms, sensors, you should use ANSI/TIA/EIA-485. The wires will be the same as your ethernet in case you ever change your mind, but if you design it right, you won't need to.

You rarely see any theaters, hotels, or shopping malls using anything else but ANSI/TIA/EIA-485.

Comment More susceptible to DDoS attacks? No. (Score 1) 44

Aside from the attack in the article, one might think that VSAT terminals are much more susceptible to DDoS attacks because of their limited bandwidth and the carrier's Fair Access Policy. One might assume that pretty much anyone who wanted to could just send data to the IP address of one and The FAP will restrict the throughput.

The thing is, the commercial VSAT providers have already thought of this. Each terminal is on a private network behind a NAT already, even if you're not using the software proxy accelerator. Incidentally, modern terminals already have the network accelerator built into the VSAT modem, but regardless of this most VSAT terminals are on private networks and can't be reached directly.

Back to the article, the uplink exploit is well-known and several decades old, as another poster reminds us of the 1980 Captain Midnight incident. Even in this case, the best you can do is deny service, and you'll eventually be caught doing it.

At the earth station you're not going to be stealing any data, as it's encrypted on the way down and you're not going to be breaking into the facility.

You're not likely to find them by scanning networks, either, as mentioned earlier most VSAT terminals are on private networks. Even if you were to reach the terminal directly the management port isn't reachable from the outside world, just the private network of the VSAT operator.

The article is an interesting bit of speculation, and has the obligatory mentions of Afhanistan, SCADA, and the SHODAN search engine.

Comment Why not thin clients using PCoIP or RDP? (Score 2) 250

Why are they not using thin clients like VMware, Citrix, with PCoIP? I recently visited a Bob's furniture store and all their POS terminals were thin clients using either RDP, Citrix, or bus virtualization protocols like PCoIP. Same with the terminals at all the centers at another firm.

With the current generation thin clients, particularly the nifty PCoIP ones, local performance is very attainable even though it isn't really needed for POS terminals. VMware has offered PCoIP since 2008 and Amazon has just released their implementation.

I think Target deserves what they got for having POS terminals that are allowed to be locally modified in any way.

Comment Re:This is incorrect (Score 1) 181

The CDN just sends you to the edge servers that are closest peer to the DNS server. I thought there was a very elaborate geolocation scheme, but there is not. They merely use the location of the DNS server that resolves your query.

I was so disappointed. There is no magic. They do not know nor care about the end user's IP address. The CDN just sends you to the edge servers that are closest peer to the DNS server. Certain companies actually seem to own patents on this simple technique.

Slashdot Top Deals

This restaurant was advertising breakfast any time. So I ordered french toast in the renaissance. - Steven Wright, comedian

Working...