On a side note for reference.
>> My system is loaded with one of the newer versions of solaris 10
>> $ uname -a
>> SunOS my_machine 5.10 Generic_139555-08 sun4u sparc sun4u
>
>
> Note that Solaris 10 in general does not by default enable DMA
It's natural to expect that "Solaris 10 in general" covers x86, isn't?
Quoting 'man ata' from Solaris 10:
Direct Memory Access (DMA) and PCI-IDE Systems
Direct Memory Access is enabled by default. To disable DMA
...
> but you need it
> for writing. See eeprom(1)
eeprom(1) manual page contains no mention of DMA.
> Note that Solaris sparc still does not support DMA on ATA interfaces.
It's natural to expect that "still" means from oldest SPARC Solaris
implementing support for IDE through latest, isn't it? Well, I can't
speak for oldest and latest ones, but otherwise SPARC Solaris is capable
of DMA on ATA interfaces to my knowledge. Negotiated value is reflected
in targetN-dcd-options in prtconf -v output. Value of 0x000000a2 is
common for optical media units and denotes UDMA-2 mode. A.
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