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David Alan Gilbert
chocolate eating computer geek
chocolate eating computer geek
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So this is how we can launch our new £1 coins tomorrow:
http://www.bbc.co.uk/news/world-europe-39409754

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Waiting for a replacement 2nd drive for a RAID; the existing drive hasn't actually declared failure, but it's putting up a slow-retry on everything - amazingly it claims to pass an extended SMART test, doesn't record any errors, but just has an outrageous 'Raw_Read_Error_Rate' - but not enough to fail the threshold. MD did kick it out of the RAID for a timeout, but did readd it OK and it resync'd. It's a 2.8Y old Tosh drive that's been running continuously until a couple of weeks back when we had to power off for some electrical work. It didn't like that.

Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
sda 0.05 6.21 0.58 6.99 6.34 412.82 110.78 0.81 107.36 16.27 114.91 57.39 43.43
sdb 3.75 2.48 0.86 6.47 277.07 138.99 113.55 0.42 56.98 5.31 63.81 4.87 3.57

ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000b 053 053 016 Pre-fail Always - 833825307
2 Throughput_Performance 0x0005 142 142 054 Pre-fail Offline - 71
3 Spin_Up_Time 0x0007 127 127 024 Pre-fail Always - 179 (Average 182)
4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 13
5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
8 Seek_Time_Performance 0x0005 110 110 020 Pre-fail Offline - 36
9 Power_On_Hours 0x0012 097 097 000 Old_age Always - 24669
10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 12
192 Power-Off_Retract_Count 0x0032 046 046 000 Old_age Always - 65535
193 Load_Cycle_Count 0x0012 001 001 000 Old_age Always - 239934
194 Temperature_Celsius 0x0002 139 139 000 Old_age Always - 43 (Min/Max 25/49)
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Extended offline Completed without error 00% 24608 -
# 2 Short offline Completed without error 00% 2 -


You know it's spring when you get woken up in one night by a hailstorm and a bee.

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http://csrc.nist.gov/news_events/cps-workshop/slides/presentation-3_salem.pdf is a nice set of slides on worries about security during chip manufacture.
I came to it having wanted to read more having read http://spectrum.ieee.org/nanoclast/semiconductors/processors/xray-ic-imaging which is X-ray imaging of a chip wiring which is very impressive, which I got via +Mark Bruce's SciTech Digest - http://www.scitechdigest.net/2017/03/superfluid-helium-entropy-military.html

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Many people will be going to sleep tonight with Johnny B. Goode playing in their brain.

https://www.youtube.com/watch?v=6ROwVrF0Ceg

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I've just been reading about Excess-3 code; https://en.wikipedia.org/wiki/Excess-3 and other ways of encoding BCD other than the 8421 representation I've always known. This came from looking at the manual +David Anders linked for the HP Decade counters he got, which used 1-2-2-4 encoding. I'd never considered there was another way.
WOW! I Found Datasheets!
spent a little time this evening doing a little google-foo and found datasheets and manuals for the HP Decade Counters I purchased earlier today at the RetroTech Show! (here is the link to my earlier post - https://plus.google.com/u/0/+prpplague/posts/QtdQGfkjqPf)

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Spring, not quite sprung.
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I've just finished reading 'The universal history of numbers' by Georges Ifrah; it's an excellent tome. It covers the basics of counting from counting with stones and body parts, up through all of the cultures, the standardisation on base-10 and the evolution of or number system and the emergence if 0. It's got pretty detailed overviews of most cultures including roman numeral like systems, alphabetic counting, Mayan pictograms, Chinese, Greek etc But it's deepest section is on India, and the origins of or numerals there and 0 - it's incredibly detailed. Including things like early ways of multiplication (which was apparently something most learned people didn't know in Europe until quite recently) Then it follows the numbers through Arab culture until they eventually got noticed and accepted in Europe. This is much deeper than normal popular books, it's as much a reference work but quite readable.
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