Messages in this thread | ![/](/images/icornerl.gif) | | From | Willy Gardiol <> | Subject | Promise and sparc64 | Date | Sat, 20 Dec 2003 19:53:49 +0100 |
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I have got an Ultra5 (sparc based, sun4u) and tried to plug both a Promise Ultra100tx2 (pdc20268) and a Promise FastTrack 2000 (pcd20271).
The system boots and the kernel (2.4.23) works, the two UDMA100 disks plugged (one per channel) on the promised works in PIO mode.
If i enable DMA on a single drive it WORKS (up to udma2 tested, with hdparm - -X66) When i enable DMA on the other channel (it does not count which one) i start getting many DMA errors (-20 and -22 error codes) and soon the disks hangs bringing the system down (but no kernel panic).
Similar, if i enable DMA on one channel then start coping data bethween the two channels the systems suffers the same symptoms.
Please note, both the controller and the disks have been used successfully in UDMA5 on a x86 system before, and now the disks positively works in mdma2 using the onboard CMD ide controller of the Ultra5 (does not seems to be able to do UDMA at all)
Is this a know issue?
- --
! Willy Gardiol - willy@gardiol.org www.gardiol.org Use linux for your freedom.
"Linux is like a wigwam: no windows, no gates, Apache inside."
"Linux è come una tenda indiana: niente finestre, niente porte, gli Apache dentro.
Albert Arendsen
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