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Home > Archive > Data Storage > October 2004 > Identical disks showing different DMA modes under Windows XP -- why?
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Identical disks showing different DMA modes under Windows XP -- why?
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| Spammay Blockay 2004-10-16, 2:45 am |
| I just installed a Hitachi Travelstar 7k60 as my secondary drive
in my Thinkpad laptop, to go with the same model drive as my primary drive.
I looked at the device properties for the new drive, and it was showing
DMA Mode 2, whereas the primary drive was showing DMA Mode 5.
These values are unchangeable in the XP interface, from what I can see.
Does anyone know why one drive would have one mode selected, and the
other drive another?
- Tim
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"Spammay Blockay" <SPAMBLOCKER@BLOCKEDTOAVOIDSPAM.com> wrote in message
news:ckp094$e5d$1@bolt.sonic.net...
> I just installed a Hitachi Travelstar 7k60 as my secondary drive
> in my Thinkpad laptop, to go with the same model drive as my primary
drive.
>
> I looked at the device properties for the new drive, and it was showing
> DMA Mode 2, whereas the primary drive was showing DMA Mode 5.
>
> These values are unchangeable in the XP interface, from what I can see.
>
> Does anyone know why one drive would have one mode selected, and the
> other drive another?
>
> - Tim
Check with IBM - it may be that the secondary drive port only supports upto
UDMA-33 (mode2), which is the mode CD drives operate at these days. It could
even be as simple as the ribbon cable connecting the secondary port to the
motherboard is 40 wire (max UDMA33) instead of the 80 wire needed for
anything faster than mode 2....
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| Spammay Blockay 2004-10-16, 2:45 am |
| In article <wcYbd.468$TA1.156@newsfe1-win.ntli.net>,
GTS <gts123NOSPAM@ntlworld.com> wrote:
>
>"Spammay Blockay" <SPAMBLOCKER@BLOCKEDTOAVOIDSPAM.com> wrote in message
>news:ckp094$e5d$1@bolt.sonic.net...
>drive.
>Check with IBM - it may be that the secondary drive port only supports upto
>UDMA-33 (mode2), which is the mode CD drives operate at these days. It could
>even be as simple as the ribbon cable connecting the secondary port to the
>motherboard is 40 wire (max UDMA33) instead of the 80 wire needed for
>anything faster than mode 2....
D'oh! I think that the new drive is in Primary Slave position, just
as it says in the BIOS, and THAT is listed as UDMA-5, so I was completely
off-base with this. The UDMA-2 device *IS* the CD drive!
Thanks for pointing me in the right direction, tho'!
- Tim
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