FS#43243 - Write same error when using SAS controller with VirtualBox

Attached to Project: Arch Linux
Opened by Robert Simmons (utkonos) - Saturday, 27 December 2014, 01:44 GMT
Last edited by Gerardo Exequiel Pozzi (djgera) - Saturday, 27 December 2014, 19:34 GMT
Task Type Bug Report
Category Kernel
Status Closed
Assigned To No-one
Architecture x86_64
Severity Low
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No

Details

I'm installing an Arch Linux guest using the 2014.12.01 ISO image. I've taken the defaults for VM provisioning except for changing the default storage controller to SAS. The ISO is able to boot and the /dev/sda disk is able to be successfully partitioned using cgdisk. Creating an ext4 file system is also successful. However, when the new sda1 is mounted, errors begin appearing on the console: sda1: WRITE SAME failed. Manually zeroing.

I've changed the controller to SATA, and the problem is gone.

I'm not sure if this is a problem with the drivers in Arch, or with the SAS device in VirtualBox. I'm opening a bug with VirtualBox as well, in case its not an Arch problem.
   write-same-error.png (183 KiB)
This task depends upon

Closed by  Gerardo Exequiel Pozzi (djgera)
Saturday, 27 December 2014, 19:34 GMT
Reason for closing:  Not a bug
Comment by Jan de Groot (JGC) - Saturday, 27 December 2014, 11:51 GMT
Some devices don't support WRITE SAME, so the kernel uses a workaround. Nothing to worry about.

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