Are Ultra DMA (UDMA) drives supported?
I understand Solaris 7 recognizes UDMA drives in native mode.They are not supported in Solaris 2.6 or older, although they are
recognized in its compatibility mode as regular ATAPI drives.
During installation, you may want to disable UDMA mode if your install
hangs during recognition of hard drives
(which occurs shortly after the Solaris copyright line is displayed).
For Solaris 8, DMA is disabled for ATAPI devices,
as it caused installs to fail for several BIOSes.
It can be enabled with the "ata-dma-enabled" property from the
Device Configuration Assistant.
See the question on "How can I improve disk and graphic performance?"
for details.
[Thanks to Christopher Arnold and Steve]
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