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    WD Red price per terabyte in Europe in May 2016

    18th May 2016

    Prices were collected on May 18th, 2016, from amazon.de

    Price per terabyte of WD Red HDDs

    Capacity, TB
    Price, EUR
    EUR/TB
    625242
    520841.6
    415839.5
    311638.(6)
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    Posted in Comparison, Hardware | No Comments »

    How to fix: Xiaomi Mi Band stopped tracking steps and sleep

    26th July 2015

    Mi BandA few days ago, my Mi Band (version 1) stopped properly tracking sleep and counting steps. Here is a full list of symptoms:

    • synchronization appears to work correctly;
    • total count of steps is updated, but when you click it – there are no per-hour details;
    • in the older app version: after sync completes, there is no green message “Updated X items”;
    • night sleep tracker does not update at all: neither total hours slept, nor per-hour details;
    • the band is otherwise functional, e.g. “Find the band” works – it vibrates and flashes diodes.

    Warangelo00 found a solution, which worked for me (and no, you do not need to hard reset the device):
    note: the fix below will most probably not work for Mi Band 2, see comments; iPhone owners may try switching iPhone from AM/PM (12-hour clock) to 24-hour clock to fix the non-synchronization problems with MiBand2 – please write in the comments if this method works for you.

    1. enable Bluetooth, if it is disabled;
    2. start Mi Fit, go to Play –> Incoming call (or, in older app version, SettingsIncoming calls);
    3. enable it – set to On;
    4. now call your mobile phone from a different one – wait for the band to vibrate and flash lights;
    5. you should now be able to refresh Mi Fit main page, and see both current day and previous night per-hour details; in the older app version, it should also show the green “Updated X items” message after syncing;
    6. you can now disable incoming calls notification if you don’t need it.

    According to Holly, the trick may also work for Mi Pulse.

    Not sure if this fix will last, but it did help me – thanks, Warangelo00!

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    Posted in Hardware, how-to | 42 Comments »

    Casio G-Shock: amazing survivalist watches

    14th May 2015

    Casio G-Shock

    Casio G-Shock

    In May 2010 I’ve paid US $118 for Casio G-Shock GW-810D (Atomic/Waveceptor Tough Solar) wrist watch with stainless steel band.
    5 years later, at the end of April 2015, I lost it :( .

    Looking for a replacement, I found that:

    • Casio seems to no longer make affordable models with the same functionality and a metal band – only polymer;
    • a similar used model from Casio (MTG-something) costs upwards of 70 EUR.

    I was quite sad about that. Any survivalist-minded person can easily see why:
    Read the rest of this entry »

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    Posted in Hardware, Misc | No Comments »

    Debunking the widespread myth of 2^32=4GB being the architectural limit

    10th April 2011

    Quite a number of people are aware of the PAE which can extend the addressable space from 32bit up to 36-48-52bit (depending on the implementation; as I understand, Windows PAE extends to 36 bits, or 64GB of addressable space). However, overwhelming numbers of internet pages continue insisting that a not-more-than-4GB limit for the 32bit Windows is the consequence of 2^32 = 4GB architectural limit.

    There is an excellent, in-depth, well-argumented article by Geoff Chappell on the issue. Highly recommended in its entirety to those who want a complete understanding (additional side-reading and facts verification might be necessary).

    A single citation to get you started:

    There is already on the Internet and elsewhere an awful lot of rubbish to read about this question. Hardly any of it would be worth citing even if I didn’t want to spare the authors the embarrassment. A surprising number of people who claim some sort of attention as expert commentators would have you believe that using more than 4GB of memory is mathematically impossible for any 32-bit operating system because 2 to the power of 32 is 4G and a 32-bit register can’t form an address above 4GB. If nothing else, these experts don’t know enough history: 2 to the 16 is only 64K and yet the wealth of Microsoft is founded on a 16-bit operating system that from its very first version was designed to use 640KB of RAM plus other memory in a physical address space of 1MB. Some remember this history and add seemingly plausible qualifications that exceeding 4GB is possible only at the price of nasty hacks that require everyone—well, all programmers—to jump through hoops. Fortunately, Intel’s processors are a lot more advanced than the 8086 from all those years ago.

    P.S. Unfortunately, patching the kernel won’t help make Windows XP see more than 4GB RAM: even though the kernel itself does support more RAM (with PAE), starting with SP2 the HAL was modified in a way prohibiting access to any RAM beyond 4GB. Patching may only be suggested to devoted geeks with Vista’s and 7′s.

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    Posted in Hardware, Links, Misc, Software | No Comments »

    Analysis of the HDD failures in a large population of hard disks

    19th June 2010

    Will be useful to anyone dealing with more than 1 piece of computer hardware: Disk failures in the real world: What does an MTTF of 1,000,000 hours mean to you?

    To get the essence quickly – just scan the tables and figures, and read conclusions.

    You might want to read what google engineers tell about HDD failures.

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    Posted in Hardware, Links | No Comments »

    Intel i915 integrated graphics under Debian: how to get rid of sluggish 2D performance

    2nd March 2009

    I assume you already have configured and working desktop environment, but want to improve performance.

    First of all, sudo aptitude install mesa-utils. Then run in a Terminal/Konsole glxgears, and wait for ~15 seconds; if your FPS is ~400 or less, then you do have sluggish video performance (usually manifesting itself as slow scrolling in Firefox/Iceweasel, slow window switching/minimziing/maximizing etc).

    After reading through several forums and bug reports and blog posts, I’ve ended with the following modifications to my /etc/X11/xorg.conf:
    Read the rest of this entry »

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    Posted in *nix, Hardware, how-to | 5 Comments »

    An alternative to shared hosting

    4th June 2008

    Personal communication resulted in a link to slicehost, who provide VDS/VPS services at prices as low as 20$/mo, which is comparable in price to good shared hosting plans, and is cheaper than Dedicated plans.

    I’m considering a move from shared hosting, and found Slicehost attractive. For 20$/mo, you get guaranteed 256MiB RAM, 10GiB disk and 100GiB traffic, which is sufficient to host several under-1k-per-day sites.

    The only thing which isn’t spoken aloud is the guaranteed CPU speed. Based on the numbers provided: 16GiB total RAM per server, quad-core CPU, and CPU quotas set equivalently to RAM quotas, I came to a conclusion that 20$-plan guarantees ~125MHz of CPU (take 16 GiB, multiply by 4 20$-plans – you get 64 “slices” – virtual servers; quad core CPUs were quoted as 8+GHz – I assume that’s the sum of the core frequencies, thus 8GHz divided by 64 slices gives as little as 125MHz guaranteed per slice).

    The better slice you buy – the more CPU is guaranteed, so for 1024-RAM slice you’d have a minimum of 500MHz of CPU.

    However, slicehost describes their CPU-clamping system as the one allowing “bursted” performance, if others aren’t actively using their CPU shares. So it must be much better than what I’m calculating here. And even if it’s not, then for some applications it’s better to have a 125MHz-clamp on CPU, than have a 20-seconds maximal CPU time limit.

    Still, I’m looking for reasonably-priced collocation services in Ukraine – e.g. those (currently unavailable) from Volia, starting at 40$/mo for the rented physical VIA C7-based server with enough traffic included.

    Update: I now have my own server collocated in Ukraine. This blog still lives on a shared hosting, but I’m considering the move to own server (where I have the biomed half-dead site and resource-hungry COTRASIF tool).

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    Posted in Hardware, Links, Notepad, Web | No Comments »