On Thu, Dec 01, 2005 at 11:44:32PM -0500, Jason Dixon wrote: > I recently purchased a pair of Iron Systems A210 servers for a firewall > installation. The systems were ordered with no hard drives and ide-to-CF > adapters onboard. > They are running 3.8 -release on 512MB compact flash (SanDisk SDCFB-512). > I'm seeing the following error in the same place on both systems at boot: > > wd0(pciide0:0:0): timeout > type: ata > c_bcount: 512 > c_skip: 0 > pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21 > wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying > wd0(pciide0:0:0): timeout > type: ata > c_bcount: 512 > c_skip: 0 > pciide0:0:0: bus-master DMA error: missing interrupt, status=0x21 > wd0: transfer error, downgrading to PIO mode 4 > wd0(pciide0:0:0): using PIO mode 4 > wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying > wd0: soft error (corrected) > > Everything then continues as usual, although I'm also not doing any > intentional writes to disk. Anyone have any idea what might be causing this > and if it's safe to > ignore (yeah, right).
Have you tried to disable (Ultra)DMA with config(8) on the wd device? The flags you might need are listed in wd(4). I needed that for an old box where OpenBSD tried to "talk" with the IDE Controller in UltraDMA2 mode and then downgraded it until it was PIO4. That process took a lot of time, but did nothing bad to my data. As far as I understand it, this is not an error, just a bit annoying if boot time matters. Tobias
