On Mon, 30 Jul 2012 21:06:03 +0100, "J. P. Gilliver (John)"
In message <
[email protected]>, R. C.
Hi, Paul.
A typical scenario might be, you buy a memory card reader, plug it
in, and it grabs D:,E:,F:,G: for drive letters, forcing your HDD D:
partition to become H:. Of course, you can always unplug the memory
card reader. But then, how does the OS modify the registry, if it
runs one time, and the profiles are missing ?
Disk Management handles all this.
When we let Windows assign letters to new devices (HDD partitions, SD
cards, USB flash drives, etc.), it generally assigns "the next
available letter" - and thus the assignment can vary from one session
to the next, depending on what is already plugged in and assigned.
But if we use DM to assign the letters we want to each device, then
Windows remembers that assignment and will use it for THAT device each
time, unless we've somehow created a conflict since the initial
assignment. There is NO requirement that we assign letters in sequence
and no prohibition against skipping letters. If you want your memory
card reader to always be S:, T:, U: and X:, then use DM to assign those
letters. When you remove the card(s), then re-insert them, the same
letters will be used again. None of this will affect the letter
assignments on your HDD or SSD. And if the HDD or SSD "goes missing",
either because it is unplugged or defective - or you've changed its
letter with DM - those memory card letters won't have changed.
[]
That's all very nice, but hasn't answered RCW's question.
RCW? Who dat? Anyway, the original question has been answered multiple
times already.
If he has hard
drive partitions C and D, and he sometimes plugs in a card reader that
grabs D E F and G (because he _hasn't_ done the thing you describe with
DM), his D hard drive partition may become H.
The card reader CAN'T grab D E F G if D is already assigned to a drive
volume unless D is currently disconnected from the system. If D is the
location of the user's personal (system) folders, then presumably D
isn't disconnected (since doing so would make the user's folders
inaccessible) and hence, there is no drive letter collision because
the card reader will be allocated unused drive letters.
If he has a hard drive partition that is sometimes D and sometimes H in
this manner, does the system - registry, presumably - look after
references to D/H, or not? (Such as where "My Documents" is.)
No, the location wouldn't be dynamically updated, but fortunately the
scenario you describe is exceedingly rare. Why would someone redirect
their personal folders to a volume that is (sometimes) disconnected?