thinkpad t23 DMA issue

[hey00]

hey everyone..

I just got another T23 today, and I was installing a seagate ST9408114, 40GB 5400RPM 8mb 100ATA AST 12ms seek(slow LOL)

anyways this T23 2647-JU2 with latest bios under windows xp pro sp2, is reporting DMA Mode 2 instead of DMA Mode 5 is strange, and than I try a HITACHI hd it was set mode 4(66MB). I put seagate hd with my desktop using converter bios picked UDMA Mode 5..

so what is the deal here? anyone experience this?

[christopher_wolf]

Yes, it is a bug/"Feature" with Windows where, if it detects a certain amount of errors from a drive, it will downgrade the UDMA mode...sometimes all the way down to PIO mode. Both drives should be set at the highest UDMA mode they can handle; the device manager should handle this automatically.

[hey00]

thank you for your reply.

Well under Device Manager, it says DMA mode 2 I can't change the value.
not only just that, HD Diag tool picks up UDMA mode 2.
is there anyway to overcome this?


I tried searching for answer.. I couldn't find answer to my question.

[awdark]

I dont know the UDMA mode for the T23, but im pretty sure UDMA2 is the highest the T20 can go.

For a desktop, I would go to the device manager and uninstall the primary IDE controller, restart and it usually kicks it back into UDMA5

[hey00]

I dont know the UDMA mode for the T23, but im pretty sure UDMA2 is the highest the T20 can go.

For a desktop, I would go to the device manager and uninstall the primary IDE controller, restart and it usually kicks it back into UDMA5

well tawbook, stated T23 support ATA-100/66 meaning mode 2,4,5..
t20 to 22 is only udma mode 2 with I440bx chipset