# # Do modern versions of SCO Unix support IDE UDMAcontrollers?
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SCO Unix Installation FAQ

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© December 2003 (various)

This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.

Do modern versions of SCO Unix support IDE UDMA controllers?

This is an ancient post with no relevance to modern systems.

The 5.0.6 release of SCO adds support for UDMA. Ironically, adding that support may cause you to have problems installing 5.0.6 on machines that installed easily with previous releases.

The problem is that the UDMA support doesn't work with everything. If you are getting "no root disk controller", try starting the install with "defbootstr wd.udma=off"


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