Which udma mode are you using on your a1? On my sil0680 i'm using udma mode 1.In the beginning i was using best pio,cos i had heard it might not work with udma on my SE. Offcourse pio mode is slow,so i tried experimenting. I set it to udma0,it worked,so a couple of days ago i set it to 1. When using ctorrent on best pio it used 100%cpu when creating the files on my hd,on udma1 it used only 50%,and it was quicker .. So i'll now try to set it to udma2 and see how it workes.
-------------------Unit 0 information------------------------ Flags : $000001A7 - present, LBA48 used, supports DMA, ATA, supports acoustic mgmt, supports cache flush, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 69 (UDMA 5, 100 MB/s) / current 69 (UDMA 5, 100 MB/s) Total blocks : 488397168 Blocksize : 512 Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $1F0 / $3F6 / $CC00 -------------------Unit 1 information------------------------ Flags : $000001A7 - present, LBA48 used, supports DMA, ATA, supports acoustic mgmt, supports cache flush, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 69 (UDMA 5, 100 MB/s) / current 69 (UDMA 5, 100 MB/s) Total blocks : 488397168 Blocksize : 512 Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $1F0 / $3F6 / $CC00 -------------------Unit 2 information------------------------ Flags : $0000011D - present, supports DMA, removable media, ATAPI, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 66 (UDMA 2, 33 MB/s) / current 66 (UDMA 2, 33 MB/s) Total blocks : 0 Blocksize : 0 SCSI devtyp : 5 Packet size : 12 Current medium read speed : x 65535 ('65535' stands for max.) Current medium write speed : x 65535 (idem) Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $170 / $376 / $CC08
Using the fastest possible on my internal a1ide.device My HD's "could" go 133MHz (70 or UDMA 6) but as they went completely unstable under sil card and UDMA 6 i reverted back and ripped out the card to spare me a PCI slot.
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Just looking at your ide config that you have posted here, and mine, I have "error opening device" message on units 4 to 15. Have I got a uboot setting wrong, as the sii0680 only has two channels with two units on each?
Quote:
-------------------Unit 0 information------------------------ Flags : $000001A5 - present, supports DMA, ATA, supports acoustic mgmt, supports cache flush, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 70 (UDMA 6, 133 MB/s) / current 69 (UDMA 5, 100 MB/s) Total blocks : 160086528 Blocksize : 512 Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $802400 / $80240A / $802420 -------------------Unit 1 information------------------------ Flags : $00000119 - present, removable media, ATAPI, interrupts used, Xfer mode : best pio 11 (PIO 3, 11 MB/s) / best dma -1 (-) / current 11 (PIO 3, 11 MB/s) Total blocks : 0 Blocksize : 0 SCSI devtyp : 0 Packet size : 12 Current medium read speed : x 65535 ('65535' stands for max.) Current medium write speed : x 65535 (idem) Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $802400 / $80240A / $802420 -------------------Unit 2 information------------------------ Flags : $0000011D - present, supports DMA, removable media, ATAPI, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 66 (UDMA 2, 33 MB/s) / current 66 (UDMA 2, 33 MB/s) Total blocks : 0 Blocksize : 2048 SCSI devtyp : 5 Packet size : 12 Current medium read speed : x 65535 ('65535' stands for max.) Current medium write speed : x 65535 (idem) Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $802410 / $80241A / $802428 -------------------Unit 3 information------------------------ Flags : $0000011D - present, supports DMA, removable media, ATAPI, interrupts used, Xfer mode : best pio 12 (PIO 4, 16 MB/s) / best dma 66 (UDMA 2, 33 MB/s) / current 66 (UDMA 2, 33 MB/s) Total blocks : 0 Blocksize : 0 SCSI devtyp : 5 Packet size : 12 Current medium read speed : x 65535 ('65535' stands for max.) Current medium write speed : x 65535 (idem) Power mode : 2 / idle (ready for operation) IO1 / IO2 / BMCR @ : $802410 / $80241A / $802428 *** Error opening device sii0680ide.device / unit 4 *** Error opening device sii0680ide.device / unit 5 *** Error opening device sii0680ide.device / unit 6 *** Error opening device sii0680ide.device / unit 7 *** Error opening device sii0680ide.device / unit 8 *** Error opening device sii0680ide.device / unit 9 *** Error opening device sii0680ide.device / unit 10 *** Error opening device sii0680ide.device / unit 11 *** Error opening device sii0680ide.device / unit 12 *** Error opening device sii0680ide.device / unit 13 *** Error opening device sii0680ide.device / unit 14 *** Error opening device sii0680ide.device / unit 15
idetool just covers all possible units you maybe can use with more modern hardware/pci cards (maybe useable with upcoming drivers?).
I got these lines too with my onboard ide, but cut them out for readability
People are dying. Entire ecosystems are collapsing. We are in the beginning of a mass extinction. And all you can talk about is money and fairytales of eternal economic growth. How dare you! – Greta Thunberg
"Never ascribe to malice that which is adequately explained by incompetence." (Napol?on Bonaparte) "I would love to change the world, but they won?t give me the source code." (Unknown)
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.. So i'll now try to set it to udma2 and see how it workes. 
