6 Dec
2006
6 Dec
'06
8:16 a.m.
Rumor has it that 9000 VAX may have mentioned these words:
I don't know how much times a flash memory can be
written. It might be OK to
make a bootable device from it.
Between 10K and 100K times - IIRC, CompactFlash has virtual sector mapping
with load-balancing to attempt to reformat the sectors evenly(ish). Dunno
about the others...
My concern is about how to make replacement RL02, RD53
or similar. Flash
memory might not be good for this purpose.
Depending on how often the machine is used, it may very well last a long
time... but if you're still worried: MRAM. The older 5V stuff has writes
into the millions, IIRC, and some new 3.3V stuff is listed as "nearly
unlimited" - you can interpret that as you wish... ;-)
Freescale (read: ustabeen-Moto) didn't list a maximum write life in their
datasheet for the 4Mbit part they sell.
Not the cheapest, but it's not outside of "affordability" IMHO.
Laterz,
Roger "Merch" Merchberger
--
Roger "Merch" Merchberger | "Profile, don't speculate."
SysAdmin, Iceberg Computers | Daniel J. Bernstein
zmerch at 30below.com |
6 Dec
6 Dec
8:59 a.m.
On 6 Dec 2006 at 11:16, Roger Merchberger wrote:
Between 10K and 100K times - IIRC, CompactFlash has
virtual sector mapping
with load-balancing to attempt to reformat the sectors evenly(ish). Dunno
about the others...
Modern stuff is closer to 300K. But even at 100K, emulating a floppy
drive gives you about 5.5 hours of continuous rewriting of a single
track. CF sector remapping obviously can improve this number.
Heck, I can't get nearly that many writes out of a modern 3.5" 1.44MB
diskette! :)
Given the proliferation of CF, I can readily envision a not-distant
future where a technological improvement results in nearly infinite
numbers of write cycles. I note that Ramtron is now saying that its
FRAM enjoys that distinction.
Cheers,
Chuck
10 Dec
10 Dec
5:12 p.m.
New subject: video of CRT implosion?
Hi, I've been looking for videos of the CRT implosion without the
safety or safety devices defeated.
Just wanted to see this is like. I have heard of stories about
"exploding" CRTs in old days and sometimes with modern CRTs.
Cheers, Wizard
11:27 p.m.
New subject: video of CRT implosion?
On Mon, 11 Dec 2006 jpero at sympatico.ca wrote:
Hi, I've been looking for videos of the CRT
implosion without the
safety or safety devices defeated.
Just wanted to see this is like. I have heard of stories about
"exploding" CRTs in old days and sometimes with modern CRTs.
Someone made a video of monitors being shot during the Defcon Shoot. I
don't know where it went. Maybe 23.org has it squirreled away somewhere.
--
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dgriffi at cs.csubak.edu
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