AHCI Port Reset After 1500 Hours Without Any Warnings

[tjiptomangun]

Dear VirtualBox community. Our guest suddenly stop working properly after 1500 hours . First we cannot ssh into it although it is still responsive to ping request. After restart we found that guest files and /var/log/messages for the last 5 hours did not written to disk. VBox.log shows that an AHCI port reset occured 5 hours beforehand. By accident our system administrator restart the host instead of the guest, that is why there are no other information in VBox.log.1 after port reset. Unlike bug #9975 this reset did not precede by any warnings nor errors. We make a guess that this is an hard reset and from what we learn from AHCI specification, hard reset is triggered by software, which in this case is linux driver. What we don't know is why the driver reset the port. Is this because something in VD/VDI or AHCI emulation ? Please help us. Another information the host disk is configured as raid-5. Both Host and Guest are linux kernel 3.0.7

Thank you very much.

regards, tjiptomangun

[Frank Mehnert]

Sorry but this is a question for the Forums (forums.virtualbox.org). Right now it does not look like this is a VirtualBox bug at all. The guest kernel log could help to find the reason.