Solaris 10 guest prints warnings in WIn7 host which itself is a guest in FreeBSD host

[yurivict]

Win 7 guest runs fine under VBox on FreeBSD host. But Solaris 10 appliance (from oracle.com) on such Win 7 guest prints such warning: -- begin error -- WARFNING: /pci@0,0/pci8086,2829@d/disk@0,0 (ds0):

Error for Command: read(10) Error Level: Retryable Requested Block: 5902850 Error Block: 5902850 Vendor: ATA Serial Number: Sense Key: Aborted Command ASC: 0x0 (no additional sense info), ASCQ: 0x0, FRU: 0x0

-- end error --

Same Solaris 10 appliance doesn't give this warning on MacOS or FreeBSD hosts.

After this warning it proceeds to installation, and after installation prints similar warning again and hangs.

[Frank Mehnert]

Sounds to me like you are talking about nested virtualization which is not supported by VirtualBox.