Hard Drives

As I continue to wind down Speeds and Feeds, I picked ruggedness as the topic for part 3.

In part 2 of this wrap-up series, I on Tuesday discussed reliability, suggesting that an increasing portion of the transistor budget in personal computers should be used to avoid, detect, and recover from hardware, software, and data errors.

Ruggedness, the ability of a PC to survive adverse physical conditions, complements reliability by further increasing the practical availability of a PC to do useful work.

As with efficiency in power management (part 1's topic), this is an area where PCs can learn … Read more

Much has been made lately about the trend toward solid-state drives. Now a new Intel technology, code-named Braidwood, may delay that trend, blending the performance of solid-state drives with the economy of old-style hard drives.

Braidwood--like its predecessor, Intel's Turbo Memory technology (formerly code-named Robson)--is basically a solid-state cache for all the disks in the system.

I heard about Braidwood earlier this summer on CNET (see "Intel 'Braidwood' chip targets snappier software" by Brooke Crothers). But I shrugged it off, assuming it would be no better than Turbo Memory, which left a bad taste in the mouth of many PC makers, end users, and Microsoft execs. Turbo Memory (and Turbo Memory 2.0) wasn't cheap, and it definitely wasn't worth the cost. The PC industry operates on such slim margins that every dollar's worth of hardware has to earn its keep--and Robson didn't.

But then I read an EE Times article this week by Mark LePedus describing a new report from Jim Handy of analyst firm Objective Analysis.

The 62-page report is titled "Intel's Braidwood: Death to SSDs?"

Handy's report argues persuasively that Braidwood might actually be worthwhile, and that got my attention. I've known him a long time, and he's a very good analyst--he's been covering memory and caching technology a lot longer than I have. He wrote one of the standard references for computer system architects, "The Cache Memory Book."

So I sent Handy a note, and he sent me a copy of the report. And now that I've read it, I'm inclined to agree with his conclusions, assuming the information he's obtained about Braidwood is accurate. It does seem reasonable, at least.

The first thing to understand is why flash memory can be a good disk cache. This boils down to its much faster access times: microseconds, not milliseconds. Flash can actually take much longer to write than a hard disk. But for reads, it's really quick. So if you can be smart about putting the right hard-disk data in the cache, especially by choosing the right time to do those write operations, you can save huge amounts of time on future disk reads.

… Read more

I suppose if I were just in search of controversy, I'd write a post to proclaim the death of the MID (mobile Internet device) category. My obituary for the Netbook earlier this week generated a ton of traffic; I suppose I could do that again. Certainly, the concept of a MID--a device midway in size and capability between smartphones and the smallest notebooks--is under tremendous pressure from both sides.

Customers have learned that with a well-engineered browser, the small displays on phones such as Apple's iPhone and T-Mobile's G1 "Google phone" are sufficient for most … Read more

Much coverage of this year's Consumer Electronics Show is full of references to new Netbooks introduced at the show. But in fact, there were hardly any Netbooks at all, and those that did appear went almost unmentioned.

The truth is, the Netbook is dead, and good riddance. The concept of the Netbook was based on a tragic misunderstanding: the belief that tens, perhaps hundreds of millions of people worldwide wanted a portable computer that was small, power-efficient, and (here's the misunderstanding) not good for much beyond accessing the Internet.

That's where the "Net" in "… Read more

We all know that conventional rotating hard disk drives aren't the sturdiest gizmos in the world. We're trained to treat our laptops gingerly when they're running, and many laptops are equipped with motion sensors that move the disk heads away from the data tracks if the machine is bumped or dropped.

But I've just learned that disk drives are more sensitive to minor vibrations than I thought. A blog post titled "Unusual disk latency" by Sun engineer Brendan Gregg describes how disk drives can go idle for relatively long periods of time-- over half … Read more

I couldn't be at the Tuesday morning Apple launch event for the new MacBook and MacBook Pro systems, but I've had a chance to review the announcements.

Normally I focus on the technology in new products, but this time, I have to say my first impression is dominated by the appearance of these systems. These are some good-looking laptops.

The most dramatic change is the new display surround, black glass that goes right out to the edge of the upper case just like on an iPhone. The lower case also looks significantly cleaner now that the old gray … Read more

Monday, I wrote about the process of upgrading the hard disk on my Apple MacBook Pro, and the as-yet unsolved problem of migrating the 20GB Boot Camp partition on the old hard disk--along with its Windows Vista installation--to a 32GB partition on the new drive. (See "Another new hard disk...and an unsolved problem.")

Well, it's all working now. As I've always said about the Mac, most things are either easy or impossible...and this one turned out to be easy.

My thanks to my friend EDN senior technical editor Brian Dipert who provided half of … Read more

I bought my 2.33GHz MacBook Pro about two years ago, shortly after it was introduced. It came with a 160GB hard disk, but that wasn't really enough for all my stuff, particularly when I wanted to add a Boot Camp partition for Microsoft's Windows Vista.

So last July, I upgraded to a 250GB drive, a process I described here ("A new hard disk for my MacBook Pro").

That drive started feeling a little tight within just a few months, chiefly due to videos downloaded from the iTunes Store. Although I rarely buy videos from iTunes, … Read more

I miss the old SGI. Silicon Graphics was widely regarded as the greatest computer company in Silicon Valley back in the 1990s. Sometimes forgotten--but not gone--SGI was one of our greatest success stories and one of our greatest tragedies.

Apple may have had more revenue by virtue of shipping millions of small systems, but SGI's hardware spanned the range from video-game consoles (the Nintendo 64) to workstations to supercomputers. SGI's Unix-based operating system, IRIX, was one of the most sophisticated in the industry.

I used to lust over SGI machines. I'd obsess over lists of used SGI gear, looking for a great deal that would let me have my own IRIX box at home. In 2004, I finally bought an Octane with MXI graphics... but that was years after these machines were effectively obsolete, and I paid less than 0.5% (1/200th!) of the original retail price of the machine.

In the mid-to-late 1990s, SGI was not well managed, losing huge amounts of money because its leaders would not… Read more