This is the result of this command : angka# atacontrol mode acd0 wmda2 current mode = PIO4 angka# atacontrol mode acd0 wmda2 current mode = PIO4 angka# On 5/13/06, Dmitry Pryanishnikov <dmitry_at_atlantis.dp.ua> wrote: > > Hello! > > On Sat, 13 May 2006, Angka H. K. wrote: > > By the way what is WDMA and why it saying PIO not WDMA ? > > WDMA corresponds to so-called "multiword DMA" transfer mode. It's slower than > UDMA (IIRC WDMA2 gives 16Mbytes/s, same as PIO4), but still should be > sufficient for CD/DVD drive (well, up to 8x-speed DVDs). Of course, it's > better to use WDMA2 than PIO4 because WDMA (as well as UDMA) doesn't use > CPU cycles for moving data between RAM and device. FreeBSD's ata driver > is quite conservative, and doesn't automatically enable WDMA mode for > ATAPI device even if hw.ata.atapi_dma=1, so you should just enable > this mode with atacontrol. E.g., you can add > > /sbin/atacontrol mode acd0 wmda2 > > to your /etc/rc.local file. > > Sincerely, Dmitry > -- > Atlantis ISP, System Administrator > e-mail: dmitry_at_atlantis.dp.ua > nic-hdl: LYNX-RIPE >Received on Sat May 13 2006 - 14:27:59 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:38:55 UTC