stevej-lab-notes.blogspot.com

SteveJ's lab-notes

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Monday, December 22, 2014. Disk / Storage Timeline. First cut at timeline of significant events in Disk and Storage, ignoring historical devices. Like floppies and bubble memory. Edward Grochowski. S 2012 Flash Memory Summit. 160;[1949: BINAC. N time...

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My Laboratory Note Book on a Miscellanea of Topics. If I believe I.T. isn't a professional discipline and two of the missing elements are Lab Note Books and Robust Critique (as in the Academic sense of Robust Defence) - then I've got to do as I say. Monday, December 22, 2014. Disk / Storage Timeline. First cut at timeline of significant events in Disk and Storage, ignoring historical devices. Like floppies and bubble memory. Edward Grochowski. S 2012 Flash Memory Summit. 160;[1949: BINAC. N time...

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SteveJ's lab-notes | stevej-lab-notes.blogspot.com Reviews

https://stevej-lab-notes.blogspot.com

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Monday, December 22, 2014. Disk / Storage Timeline. First cut at timeline of significant events in Disk and Storage, ignoring historical devices. Like floppies and bubble memory. Edward Grochowski. S 2012 Flash Memory Summit. 160;[1949: BINAC. N time...

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stevej-lab-notes.blogspot.com

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SteveJ's lab-notes: RAID++: RAID-0+ECC

http://www.stevej-lab-notes.blogspot.com/2014/04/raid-raid-0ecc.html

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Tuesday, April 22, 2014. RAID : RAID-0 ECC. And going back to the 1987/8 Patterson, Gibson, Katz RAID paper. Make no distinction between transient and permanent failures: errors or dropouts versus failure. This is a pretty simple observation:. With th...

2

SteveJ's lab-notes: July 2014

http://www.stevej-lab-notes.blogspot.com/2014_07_01_archive.html

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Friday, July 04, 2014. OS/X Time Machine, performance comparison to command line tools. A performance comparison for Mac Owners:. Just how quick is Apple’s Time Machine? Way faster than you can do with OS/X command line tools. Links to this post.

3

SteveJ's lab-notes: January 2013

http://www.stevej-lab-notes.blogspot.com/2013_01_01_archive.html

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Thursday, January 17, 2013. Storage: FileSystems, Block/Object Storage and Physical Disk Management in 21st Century Systems. The central social contract filesystem and storage layers have with users is:. Performance is nice, but can never. The old app...

4

SteveJ's lab-notes: OS/X Time Machine, performance comparison to command line tools.

http://www.stevej-lab-notes.blogspot.com/2014/07/osx-time-machine-performance-comparison.html

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Friday, July 04, 2014. OS/X Time Machine, performance comparison to command line tools. A performance comparison for Mac Owners:. Just how quick is Apple’s Time Machine? Way faster than you can do with OS/X command line tools. Internal 300GB 2.5" ...

5

SteveJ's lab-notes: RAID-1: Errors and Erasures calculations

http://www.stevej-lab-notes.blogspot.com/2014/06/raid-1-errors-and-erasures-calculations.html

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Wednesday, June 18, 2014. RAID-1: Errors and Erasures calculations. Treating RAID-1 and RAID-10 as identical). N = number of drives mirrored. N=2 for duplicated. G = number of drive-sets in a Volume Group. An array may be composed of many Volume Groups.

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stevej-on-it.blogspot.com

SteveJ-on-IT: RAID++: What invention or change is needed now to take us the next 25 years?

http://stevej-on-it.blogspot.com/2014/05/raid-what-invention-or-change-is-needed.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. RAID : What invention or change is needed now to take us the next 25 years? For an industry, digital data storage, that's seen disruptions every 25 years, we're either overdue for one or The Next Revolution has arrived, but nobody's noticed. What will the Next Big Thing in Storage look like? What, if anything, will succeed RAID, if it hasn't already? There has also been...

stevej-on-it.blogspot.com

SteveJ-on-IT: Microsoft: Have missed the boat on catching up to Apple & Google.

http://stevej-on-it.blogspot.com/2013/06/microsoft-have-missed-boat-on-catching.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. Microsoft: Have missed the boat on catching up to Apple and Google. In early 2007 I started opining that Microsoft would "hit a financial pothole". Around 2010. Thirty posts followed. Before I gave it up: the mainstream and financial press were looking seriously at the topic. [A Forbes columnist "called the game". I'm a technical person, not a financial analyst. Paul Wa...

stevej-on-it.blogspot.com

SteveJ-on-IT: I.T. is NOT a Profession. There are NO consequences for Failure, It's Unprofessional to not Learn.

http://stevej-on-it.blogspot.com/2013/06/it-is-not-profession-there-are-no.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. IT is NOT a Profession. There are NO consequences for Failure, It's Unprofessional to not Learn. A response to a piece on Delimiter. Reporting QLD and VIC government project failures. Compare the local IT failures with these comments from Infoq. This is best illustrated by the findings from the US Department of Defense (the DoD).[10]. Not just the Public sector. No diff...

stevej-on-it.blogspot.com

SteveJ-on-IT: Security: Healthcare, Computers and Ignorance/Inaction.

http://stevej-on-it.blogspot.com/2014/01/security-healthcare-computers-and.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. Security: Healthcare, Computers and Ignorance/Inaction. A year ago I wrote. That with the then epidemic of "ransomware" attacks the Hackers had learned how to monetise remote attacks on Healthcare practices. That piece included detailed suggestions on minimum necessary practices and questions for suppliers and vendors. This near monopoly places a high duty of care on th...

stevej-on-it.blogspot.com

SteveJ-on-IT: RAID: Timeline of IBM Disk Storage

http://stevej-on-it.blogspot.com/2014/05/raid-timeline-of-ibm-disk.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. RAID: Timeline of IBM Disk Storage. A highly selective history of Disk Storage referenced later. Focussing on IBM's contributions with some of their competition mentioned. This provides context for previous articles, on Lessons from RAID. A good general reference is the Computer History Museum. And the laster Super-minicomputers. PDF, Paper on Bells Law. Computing Tabul...

stevej-on-it.blogspot.com

SteveJ-on-IT: RAID++: Erasures aren't Errors

http://stevej-on-it.blogspot.com/2014/06/raid-erasures-arent-errors.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. RAID : Erasures aren't Errors. I'm following the Communications / Transmission theory nomenclature of "Erasures" to mean drive failure ('no signal') and "Errors" to mean incorrectly sent and received symbols. With 5,000 x 2.5" 2TB drives in a single rack, what hardware problems will we experience? Worldwide, it's assumed a single vendor might sell 100,000 of these arrays.

stevej-on-it.blogspot.com

SteveJ-on-IT: Recruiting FAIL: Update with ITCRA documents

http://stevej-on-it.blogspot.com/2014/06/recruiting-fail-update-with-itcra.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. Recruiting FAIL: Update with ITCRA documents. I was given an undertaking that a) ITCRA would write a Case Study from my complaint, in lieu of informing me of their determinations and actions taken, and b) I would be sent a copy. A year on, Dec 2013, I enquired after the Case Study. My guess from the delay is that it'd never been written, as promised in writing. This is ...

stevej-on-it.blogspot.com

SteveJ-on-IT: Software Engineering: Failed profession or not? Windows vs Linux kernel

http://stevej-on-it.blogspot.com/2013/05/software-engineering-failed-profession.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. Software Engineering: Failed profession or not? Windows vs Linux kernel. A fascinating read by a Windows Kernel developer. About the social dynamics of Linux vs Windows kernels. The post raised in me three reactions:. Comments quickly become "TL;DR" not just diminishing, but negating their value. Writing is exceedingly rare and like musical "hits", is not. Formulaic, ne...

stevej-on-it.blogspot.com

SteveJ-on-IT: Microsoft: End Games have started.

http://stevej-on-it.blogspot.com/2013/08/microsoft-end-games-have-started.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. Microsoft: End Games have started. News report on a shareholder class action against the Microsoft management team. And failure of "Surface", and consequent $900MM writedown of inventory. My reaction to the friend who sent me the link:. Ballmer is acting like an Emperor. That was OK for Bill to do. He had the full commitment of the troops. Glen B Allman - NASA Program M...

stevej-on-it.blogspot.com

SteveJ-on-IT: RAID++, HDD's and Ownership

http://stevej-on-it.blogspot.com/2014/06/raid-hdds-and-ownership.html

Thirty Years in I.T. Theories, Ideas, Opinions. Leveraging knowledge of the past to understand now. @SteveJCbr and stevej.cbr@gmail.com. RAID , HDD's and Ownership. The underpinning of Data Storage, especially for large Enterprises, fundamentally shifted when disk drive capacity increase dropped below 7%/year (40% in 5 years, the design-life of HDD's). Disk Drives are now consumables. I posit the following following from this:. Data is the lifeblood. Replacement of failed drives. If either drive supplier...

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stevej-lab-notes.blogspot.com

SteveJ's lab-notes

My "Laboratory Note Book" on a Miscellanea of Topics. If I believe I.T. isn't a "professional discipline" and two of the missing elements are "Lab Note Books" and "Robust Critique" (as in the Academic sense of Robust Defence) - then I've got to do as I say. Monday, December 22, 2014. Disk / Storage Timeline. First cut at timeline of significant events in Disk and Storage, ignoring historical devices. Like floppies and bubble memory. Edward Grochowski. S 2012 Flash Memory Summit. 160;[1949: BINAC. N time...

stevej-on-bband.blogspot.com

SteveJ on Broadband: pre-election NBN posts

SteveJ on Broadband: pre-election NBN posts. NBN Issues, Commentary and Opinion. 30 yrs in I.T. and Telecomms. Friday, 27 September 2013. Copper cheaper than Fibre? Only if you cook the books radically! Comparing costs is only half the picture, profits. Are what drives business. Turnbull has omitted anything to do with revenue, charges or profits from. If you include payments to Telstra, Copper is always more expensive than Fibre. If you use the actual. A claim he's not refuted in nearly six months.

stevej-on-healthcare.blogspot.com

Stevej on Healthcare

Comments on Healthcare, Healthcare Reform, Quality of Care, Patient Safety. Thursday, May 30, 2013. I2P: Rolling Pharmacies into the Digital Age. The Digital Age won't be more of the same, but faster, for Pharmacies. There are three big Disruptions coming your way, necessary to address ballooning healthcare costs. There's an App for that", including sensors. Dr Topol on RockCentre. CSIRO have a major Telehealth project. NBN are running a $5MM trial. From CEBIT, a tweet from the ABC. Identity bracelets an...