People who've visited me at home know that I'm a huge fan of total silence. I've taken considerable steps to end up with an office which is totally quiet (and consumes virtually no power as a nice side-effect). An obvious tip: turn off what you don't constantly need. Better still: make stuff turn off by itself after a certain time. Slightly less obvious but very effective: use 2.5" USB-powered external HD's where possible (on my NSLU2-based server, and attached to my MacBook Pro for Time Machine backups). Disk capacity is no longer an issue.

As I said, the result is perfect - and music is fun again, even at a very low volume.

Which makes this post hilarious ;)

Even Spotlight, the Mac's built-in indexer/searcher can get bogged down:



On a disk with lots of little files, source code, emails, that sort of thing mostly:



I'll let it run - just to see how effective Leap would be with such a collection.

I've solved the problem of having robust storage both on- and off-line: RAID 1 over 3 disks with a write-intent bitmap.

Let me explain. I've been moving more and more information to disk lately, scanning in books and de-duplicating all cdrom/dvd backups (we had all our vinyl and negatives digitized a while back). Takes only 250 Gb so far, not counting mp3's/m4v's that is (which have less uniqueness value to me). See this NYT article - where Brewster Kahle summarizes it well: "Paper is no longer the master copy; the digital version is".

But with bits, particularly if some of 'em are in compressed files, data integrity is a huge issue. Which is where RAID makes sense. So I got two big SATA disks, hooked them up to trusty old "teevie", a 6 year old beige box stashed away well out of sight and hearing. With RAID 1 mirroring, everything gets written to both disks, so if either one fails: no sweat.

But RAID does not guard against fire or theft or "rm -r". It's a redundancy solution, not a backup mechanism. I want to keep an extra copy around somewhere else, just in case. Remote storage is still more expensive than yet another disk, and then you need encryption to prevent unauthorized access. Hmm, I prefer simple, as in: avoid adding complexity.

So now I'm setting up RAID to mirror over three disks. The idea being that you can run RAID 1 just fine in "degraded" mode as long as there are still 2 working disks in the array. Once in a while I will plug in the third disk, let the system automatically bring it in sync with the rest, and then take it out and move it off-site again.

But the story does not end here. Bringing a disc up to date is the same as adding a new disk: RAID will do a full copy, taking many hours when the disks are half a terabyte each. Which is where the "write-intent bitmap" comes in: it tracks the blocks which have not been fully synced to all disks yet. Whenever a block is known to be in sync everywhere, its bit is cleared. What this means is that I can now put all three disks in, let them do their thing, and after a while the bitmap will be all clear. Once I pull out the third disk, bits will start accumulating as changes are written to the other two. Later, when putting the third disk back on-line, the system will automatically save only the changed blocks. No need to remember any commands, start anything, just put it on-line. Quick and easy!

If a disk fails: buy a new one, replace it, done. Every few months, I'll briefly insert the third disk and then safely store it off-site again. If I were to ever mess up really badly (e.g. "rm -r"), I can revert via the third one: mark the two main disks as failed, and put the third one in for recovery to its older version.

Methinks it's the perfect setup for my needs. Total cost under €300 for the disks plus cheapo drive bays. Welcome to the digitalization decade.

There's something odd when you see a new gadget announced on a geek site ... which we've had in the house for some two years now:



See http://www.wettershop.de/ under Designprodukte/Thermometer. It sticks on the outside of a window, BTW.

There is a feature in Mac OS X 10.5 which gets mentioned a lot lately: Time Machine. Unfortunately, Apple has done a good job of grabbing everyone's attention with the user interface of this thing, but the key advance is not the looks but the inner workings of it all. What TM does, is maintain hourly/daily/weekly rolling backups. Which is great, except that until now you always had to somehow keep system load and disk usage in check. So normally this approach simply doesn't scale well enough to be used on an entire disk, no matter how clever you wrap up rsync, etc. Which means you end up with a diverse set of backup strategies. Messy, tedious, and brittle, alas.

Well, times have changed. TM is revolutionary, because its overhead is proportional to the amount of change. Every hour, my (quiet) external HD spins up, rattles for a few seconds, and then spins down again after 5 minutes (not 10, see "man pmset"). All you need is a disk with say 2..3x as much free space as the backed-up area. One detail to take care of is to not include big changing files such as VMware/Parallels disk images and large active databases in the backup, because TM backs up per file. So I put all those inside /Users/Shared and exclude that entire area.

Oh, and TM does the right thing: it suspends and resumes if its external disk is off-line for a while, such as with a laptop on the road.

Note that attached disks cannot protect from malicious software and major disasters such as a fire - but this is something an occasional swap with an off-site disk can take care of.

I no longer "do" backups. I plugged external disks into the two main Macs here and TM automatically asked for permission to use them. End of story.

Installed Vista Ultimate under VMware Fusion today (do I need it? no, but it's good to know a bit about it and for testing) - it nearly fills an 8 Gb disk image, and it gobbles up 1 Gb of RAM. I won't bore you with my opinion on those two facts...

VMware has a quick setup whereby it asks your name and a password and then lets the whole setup run with no further questions asked. After the whole install process, the system comes up logged in and ready to go - which is great.

Except that I did not enter a password, which leads to a system which does an auto-login with a password I do not know. It's definitely not the empty string. I don't even know who is to blame, VMware or Vista... After trying a few things and googling a bit, I was about to conclude that a full re-install would be my only option. No info on special boot keys to bypass/reset things, the built-in help says you need to know the admin password (or have a rescue disk, which... needs an admin password to be created). It all makes sense of course, but I wasn't getting anywhere with all this and left with a setup I couldn't administer.

But guess what: as admin, you can create a new user with admin rights, and it doesn't ask for your password! So I created a temporary user with full admin rights and with a known password, and switched to it. Then I reset the original admin's password - bingo. Did this after all the latest updates were applied, btw.

In other words: anyone can do anything on a machine running Vista if the current user is an administrator, without ever having to re-confirm the knowledge of that admin's password: simply create another admin and switch to it.

Pinch me. How many years has Vista been in development? How long has it been out as official release? On how many systems has it been installed?

Just came across an interesting utility called JungleDisk. It creates a virtual disk on the desktop which is automatically encrypted and backed up to Amazon's S3 service. The disk uses local storage as cache for fast local use, and is accessed via WebDAV - which is how it can figure out what to send to S3 in the background. It only sends changes, AFAICT. This looks like an eminently practical solution - even for larger datasets, such as a personal photo collection.

Haven't used it - beyond a quick tryout. JD only caches files up to a (configurable) limit, the rest gets pulled from S3. Also, it looks like offline mode is not supported (yet, apparently) - though setting the cache big enough to always hold everything might do the trick.

To follow up on my Flex lock-in post, see this article: the language of the future could indeed be JavaScript.

This does not imply what we should all jump ship and move to JS - just like Windows being dominant is no reason to adopt it.

Not so long ago, one of my Mac's pixels went black.



Fortunately, the other 7,857,999 are ok :)

Adobe's Flex provides a way to push XML-based "code" from a server into a Flash player running on the browser. There's a nice online demo. It looks like a useful approach - the Flash player is nearly ubiquitous by now.

I can't help but think that the Tk browser plugin could have filled this spot ages ago. And much more, by now.

The news is that Flex will be open sourced before the end of the year. Think about it: open source code, written for a presentation engine that is fully controlled by Adobe. Clever. It's not easy to come up with scenario's whereby you get to lock-in open source developments.

In other words: to conquer the world, get into the browser. JavaScript and Flash did. Is everything else becoming irrelevant?

Update: another player in this field is Microsoft with Silverlight.

My new 120 Gb hard disk came in today... cool.

It came with a MacBook around it... super cool!

What a clever idea! I'll wait for a euro version.

Yesterday, the system disk of "teevie", my AMD64 Linux box (which also hosts a range of other OS'es as VMware images) started running into hard disk errors.

The drive was getting terribly hot, so I took it out of the 3.5" drive slot to get some more free-air cooling. Problems went away long enough to recover all partitions with a couple of restarts (and many hours of patience). Thank you Knoppix and rsync, for being there when I needed you.

As it so happens today a big new external HD arrived (Maxtor OneTouch III), so I have been busy making full backups of all the main machines around here. No fun, but I guess I got away with the occasional when-I-think-of-it full backup style I've been doing for years now. It's not the work lost that I fear (I really do backup my active files a lot), but the amount of time it takes to restore a well-running system after serious hardware failures. Copying these big disks takes forever.

The failing IBM Deskstar 120 Gb drive worked for about 5 years without a hitch, so it really did well. Luckily, there's a spare 80 Gb around here which can take its place - but it sure takes a lot of time to shove those gigs around and get all the settings just right again!

I'm re-discovering VoodooPad again. A quote from an older interview with Gus Mueller:

Don't underestimate the amount of work that goes into a real Macintosh application. Or any application, for that matter.

The current 3.1 release is very impressive, and highly innovative IMO.

At last, the start of integrating online and offline use.

The Slimserver is an MP3 jukebox which plays nice with iTunes music collections (and it does not require a Squeezebox player to be useful). Works nicely (coded in Perl, not deployed as Starkit, oh well). And now it looks like the Nokia 770 could become a nice front-end for it.

When I have time for it, am having way too much fun with Vlerq right now!

Seeing these movies gives me a very odd sensation. How can this little machine look so "real"? Amazing achievement. It all looks benign, for now...

Some people buy virtual islands. Others a picture.

The Apple Powerbook is now able to do a hybrid suspend/hibernate, as described in this article. What it means is that nothing changes in the normal case. But even if a battery runs flat (mine have been losing capacity over the years), saved state is not compromised: startup will still bring it back.

I love that second smile effect. This is what creates a truly loyal customer base.

An example of how Quicksilver and a web-based system can be used together. The video mentioned on this page illustrates the workflow dynamics of it all. I'm still looking for ways to get more of my computer work streamlined, and mice just don't cut it: no way to automate things into your spinal cord (read: effortlessly) when it takes aiming and visual feedback to get anything done.

DarwinPorts is a collection of nearly 3000 ports of various Unix/Linux software packages for Mac OS X. And there's a GUI for it, called Port Authority. Written in Tcl. Looking inside, PA appears to be using Tk, Tile, Tablelist, and Critcl - cool!

With the Nokia 770 internet tablet out, I really couldn't resist the urge to get one. Without VAT, it's only 300 euro. Linux 2.6.12, 800x480 pixels, 230g. Just arrived, an amazing gadget!

The specs, and reviews one and two.

CVSTrac is a bug tracking system tied to CVS which is delightfully simple to set up and use: there's a self-contained static executable for Linux which works right out of the box. Written by Richard Hipp, author of SQLite (which is used in CVSTrack). Absolutely top notch.

A comparison which confirms what I've been seeing, but for which I never had any real data to back it up: the Mac is not as snappy at the core level as a Linux/x86 combo. Wouldn't ever want to go back to anything else though - in terms of helping me get the work done, my 1 GHz PowerBook remains in a league of its own.

Couldn't resist trying out nb, a "small weblog engine written in Bash for the command line".