If the /export directory is near full capacity and you upgrade to the Solaris 8 7/01 operating environment, the space requirements for /export are miscalculated and the upgrade fails. The problem commonly occurs if a diskless client is installed, or if third-party software is installed in /export. The following message is displayed.
WARNING: Insufficient space for the upgrade.
Workaround: Before you upgrade, choose one of the following workarounds.
Temporarily rename the /export directory until the upgrade completes.
Temporarily comment out the /export line in the /etc/vfstab file until the upgrade completes.
If /export is a separate file system, then unmount /export before you perform the upgrade.