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May
18
comment Cannot Create User Account Named 'Con' Under Windows 7
I can't think of a better way in DOS 1.0, unless you wanted to use EDLIN (and who ever wanted to use EDLIN?)
Mar
9
comment How to create an EFI System Partition?
@BSeven t, 1, ef00.
Dec
6
comment What is the little twist in this floppy ribbon cable for?
yeah, the info was more for @fluffy than you I guess :)
Dec
6
comment What is the little twist in this floppy ribbon cable for?
The rest of the pins (read and write data, stepper motor control, head select, etc.) are bussed in the normal fashion, which is why the drive select pins are so critical. A drive has to ignore all input and produce no output when it's not selected.
Dec
6
comment What is the little twist in this floppy ribbon cable for?
The pins are in fact "Drive Select A", "Drive Select B", "Motor Enable A", and "Motor Enable B". The twist swaps Drive Select A<->B (pins 14 and 12, respectively) and Motor Enable A<->B (pins 10 and 16, respectively). All are outputs on the floppy controller and inputs on the drives.
Nov
11
comment How do web-servers “listen” to IP addresses, interrupt or polling?
@Aron it doesn't make much difference to the stuff that's described in this answer — instead of many threads each blocking on their own events, you have one thread blocking until it gets any event, but the principle is still the same.
Nov
4
comment How come one user can delete another user's 755 files?
@supercat it's not incredibly common, but it is correct. Consider the st_nlink ("number of hard links") field in struct stat. Put simply, directories hold hard links to files.
Oct
16
comment What do you call the area on a hard disk smaller than a sector?
@supercat (that accurately describes RLL codes, which are actually out of date for hard drives, but I don't have good information on the coding techniques used with PRML. They still have to guarantee enough transitions for clock recovery somehow.)
Oct
16
comment What do you call the area on a hard disk smaller than a sector?
@supercat the data is self-clocking, there isn't such an issue. A series of bits gets turned into a series of reversals. Each reversal is constrained to lie within a minimum and a maximum number of clocks of its neighbors. The variations within that range allow the data to be decoded, but the constraints allow the clock to be recovered.
Oct
16
comment What do you call the area on a hard disk smaller than a sector?
Besides that the statement "any area that is magnetised represents a binary 1 and any area that is not magnetised represents a binary 0" isn't true at all (even MFM, from the 1970s, was more complicated than that), how are these areas anything like transistors?
Sep
4
comment Can other people on an encrypted Wi-Fi AP see what you're doing?
WPA-PSK really doesn't use a secure key-exchange protocol to establish session keys?
Jan
23
comment Why is there such a big difference between “Size” and “Size on disk”?
(Less technically, it's just called "slack".)
Jan
23
comment Why is there such a big difference between “Size” and “Size on disk”?
The wasted space due to minimum allocation sizes is actually technically called "internal fragmentation", so you could say that fragmentation is the culprit. But it's still not something that any "defragment" tool can do anything about.
Jul
4
comment ubuntu make install location
in particular, building your own stuff with PREFIX=/usr most definitely counts as "doing it wrong" and will break your system in the long run.