无法在Linux中的MSSQL RC1服务器设置中挂载数据目录

Question

I'm trying to change the default data directory for MSSQL Server RC1 2017 after installation and setup in linux (Ubuntu-16.10).

I used the following command to set the default data directory. Then restarted the mssql server.

sudo /opt/mssql/bin/mssql-conf set filelocation.defaultdatadir /mnt/var/opt/mssql/data/

systemctl restart mssql-server.service

After this I tried to create a simple database "test"

sqlcmd -s localhost -U sa -P "someStrongPassword" -Q "CREATE DATABASE test" 

The error returned is as follows:

MODIFY FILE encountered operating system error 31(A device attached to the system is not functioning.) while attempting to expand the physical file '/mnt/var/opt/mssql/data/test.mdf'. CREATE DATABASE failed. Some file names listed could not be created. Check related errors.

The error log indicates an OS error:

/mnt/var/opt/mssql/data/test.mdf: Operating system error 31(A device attached to the system is not functioning.) encountered.

I cannot mount the data directory by any means. The permissions to "/mnt" directory are set to 777 too. Changing the default data directory to any other folder, works perfectly fine. Is this a known or recent bug with mssql server?

Answer 1

Yes, there is an issue with using remote storage through NFS and SMB that came up in CTP 2.1 and was not yet fixed in RC1. See release notes: https://docs.microsoft.com/en-us/sql/linux/sql-server-linux-release-notes#a-idrc1-rc1-july-2017-a The only workarounds are to use local storage or CTP 2.0. We are working on a fix. Release ETA is TBD ATM.