Opened 15 years ago
Closed 15 years ago
#4889 closed defect (fixed)
VM sporadically crashes with "Bus Error" on disk access
| Reported by: | nablaman | Owned by: | |
|---|---|---|---|
| Component: | virtual disk | Version: | VirtualBox 3.0.4 |
| Keywords: | Cc: | ||
| Guest type: | Linux | Host type: | Linux |
Description
I have an installation with 8 VBox VMs running on a Dell Poweredge machine. After weeks of operation, suddenly last night a couple of the VMs stopped functioning properly. When logging into the VMs using SSH and doing something that involved disk access (such as ls), all you get back in the console is "Bus Error". There are some ATA problems reported in the VBox.log, so I'm guessing it has something to do with the storage subsystem. I hope someone can make sense of the log.
Attachments (1)
Change History (2)
by , 15 years ago
comment:1 by , 15 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
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We had some bad experience with the host I/O cache on Linux. If the host experiences a high I/O load it happens that requests can take up to 5 minutes. The Linux kernel has a default timeout of 30 seconds and tries to cancel the operation but that fails because the I/O thread is blocked and can't resume operation until the request completed. Iti is possible to turn of the host I/O cache for the VM since 3.2. This should fix the problem.