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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="ts_solaris-10-guest-slow-boot-smp">
<title>Certain Oracle Solaris 10 Releases May Take a Long Time to Boot with SMP</title>
<body>
<p>
When using more than one CPU, Oracle Solaris 10 10/08, and
Oracle Solaris 10 5/09 may take a long time to boot and may
print warnings on the system console regarding failures to read
from disk. This is a bug in Oracle Solaris 10 which affects
specific physical and virtual configurations. It is caused by
trying to read microcode updates from the boot disk when the
disk interrupt is reassigned to a not yet fully initialized
secondary CPU. Disk reads will time out and fail, triggering
delays of about 45 seconds and warnings.
</p>
<p>
The recommended solution is upgrading to at least Oracle Solaris
10 10/09 which includes a fix for this problem. Alternative
solutions include restricting the number of virtual CPUs to one
or possibly using a different storage controller.
</p>
</body>
</topic>
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