18 Apr
2015
18 Apr
'15
4:21 p.m.
Sent from my iPhone
On Apr 18, 2015, at 03:48, Tothwolf <tothwolf at
concentric.net> wrote:
On Sat, 18 Apr 2015, Cory Smelosky wrote:
I was writing this when you sent the above reply ;)
Or I can order an HVD card as all of my cards are bad anyway.
Happen to have recommendations for an converter? I don't have a massive surplus of HVD
drives so I'll need 1 of those as well.
On Apr
18, 2015, at 02:55, Eric Smith <spacewar at gmail.com> wrote:
My memory is probably faulty about exactly what the WD suffix means. I still think
it's 16-bit "ultra" (1), but Wikipedia says that ultra (1) is single-ended
or HVD, ultra 2 is LVD or HVD, and ultra 3, 320, and 640 are LVD only.
The manual did confirm WD is definitely HVD which explains my issues.
I recall some sort of Ultra bit in it as well. ST34573WD
ST32550ND
W -- wide
N -- narrow
WD -- wide differential
ND -- narrow differential
You'll need a converter. These type of differential drives can't be connected
directly to a single ended bus, wide or narrow. If you do, you are connecting one side of
the differential pair to ground, and these drives don't like that. There are also
signal differences, see the pinouts for wide and wide differential and look at the pin
numbers for attention, busy, ack, reset, etc. Later LVD devices could detect which sort of
bus they were connected to, but these drives can't.