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Points 1 and 2 have already been accounted for. Copy partition on A
attached to on-board IDE to B attached to 3WARE: takes 5 minutes. Now
just disconnect the cables at the drives and swap them around. Copy
partition on A attached to 3WARE to B attached to on-board IDE: takes
2 hours. Point 3 is, I suppose, possible, but the on-board IDE
controller works just fine and isn't THAT old. If it could only write
about 1/24th as fast as the 3WARE card then either the system would
suck in normal operation or the 3WARE card would be worth a lot of
money. Besides that, the on-board IDE controller would have to be only
writing at 1/24th of what the drive is capable of. I haven't taken a
look at the specs of the drive, but, again, the system and IDE
controller are not that old, and they work as expected. Also, they are
both on the same PCI-33 bus. I may be that the 3WARE card is caching a
bunch, but for a sustained transfer like this, that wouldn't account
for the difference.<br>
<br>
I think.<br>
<br>
Stan<br>
<br>
<br>
<br>
Bill Bartilson wrote:
<blockquote cite="mid:94C4B60B-3558-4883-8E77-CBCF673BB291@comcast.net"
type="cite">
<pre wrap="">One is obviously faster than the other. :)
All kidding aside, if you want to shed light on what the actual
differences are:
1. Swap the drives. I know you say they are identical, but they
can't be. Each drive has different physical parts. One drive might
be dying, one might be healthy. At any rate, it's only science if you
can duplicate it. Mark one 'A' and one 'B' and try each on each
different controller, copying each way, and note any differences, and
whether the differences follow the drive or not.
2. Repeat the same deal with each other item. (IDE wires, different
jumper settings on the drive, anything else you can think of to
change.) Keep good notes.
3. Try a different piece of software (Gparted or something) Perhaps
the code written for reading data with controller X works much better
with controller X, but only for long reads, and works like crap for
long writes. I dunno.
Via process of elimination, you'll discover that one controller reads
or writes a lot faster, one of the drives is actually not so good, or
something in the code itself is different.
This all presumes it's not merely an intellectual question and you
care to 'know' the answer. I for one would be interested to hear your
findings if you care to try.
Me thinks the most likely scenario is that one of the drives is
getting funky. In which case I'd say Spinrite them both before you
try anything else.
Regards,
B
On Feb 6, 2009, at 2:35 PM, Stanley C. Mortel wrote:
</pre>
<blockquote type="cite">
<pre wrap="">OK, here's the deal. I'm using Acronis to copy a partition from one
IDE
drive to another identical drive, both are 120 GB with a single
partition. One drive is connected to the on-board IDE controller, the
other is connected to a 3WARE RAID controller with only one drive on
it. Each drive is alone on its channel / cable, set to cable
select, on
the right connector, etc. If I copy from the IDE to the 3WARE, it
takes
about 5 minutes. If I try it the other way around, it tells me it is
going to take 2 hours. There is nothing in my knowledge base to
explain
this. Anyone know why this would happen? If you don't know for sure,
any reasonable ideas?
Stan
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<pre wrap=""><!---->
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