System Administration Guide: Devices and File Systems

What's New in Removable Media?

The following section describes new removable media features in the Solaris release.

For a complete listing of new Solaris features and a description of Solaris releases, see Oracle Solaris 10 9/10 What’s New.

vold is Managed by the Service Management Facility (SMF)

Solaris 10 1/06: The volume management daemon, vold, is now managed by the Service Management Facility (SMF). This means you can use the svcadm disable command to disable the following new volfs service, if appropriate:

# svcadm disable volfs

You can identify the status of the volfs service by using this command:

$ svcs volfs
STATE          STIME    FMRI
online         Sep_29   svc:/system/filesystem/volfs:default

For more information, see smf(5).

You can use the svccfg command to display and to set additional vold properties. For example, you could temporarily enable vold logging to help troubleshooting a problem. For example:

# svccfg
svc:> select system/filesystem/volfs
svc:/system/filesystem/volfs> setprop vold/log_debuglevel=3
svc:/system/filesystem/volfs> exit
# svcadm disable volfs
# svcadm enable volfs

You can also use the svccfg command to display a listing of settable vold properties.

# svccfg
svc:> select volfs
svc:/system/filesystem/volfs> listprop vold/*
vold/config_file            astring  
vold/log_debuglevel         count    3
vold/log_file               astring  
vold/log_nfs_trace          boolean  false
vold/log_verbose            boolean  false
vold/root_dir               astring  
vold/never_writeback_label  boolean  false
svc:/system/filesystem/volfs> exit

For a description of these properties, see the vold(1M).

Improvements to Volume Management (vold)

Solaris 10 1/06: Removable media management is improved. Previously, vold did not create device links for removable devices that contain no media. Now, device links are properly created for devices that contain no media, similar to the following:

lrwxrwxrwx   1 root     root     28 Jun 13 13:09 /vol/dev/aliases/cdrom0 ->

Now, you can use the cdrw and rmformat commands to list devices that have no media when vold is running.

You can revert back to the previous vold behavior by changing the following support nomedia entry in the /etc/vold.conf file as follows:

support media

Then, restart vold. For more information, see vold.conf(4).

In addition, vold is now hot-plug aware. This improvement means that if you insert removable media, the media is automatically detected and mounted by vold. There should be no need to restart vold manually to recognize and mount a file system from any removable media device.

If you are using a legacy or non-USB diskette device, then you might need to issue the volcheck command before vold can recognize the media.

If the media is detected, but for some reason, is unmounted, then you'll need to run the following commands:

# volrmmount -i rmdisk0

Before you hot-remove a removable media device, eject the media first. For example:

# eject rmdisk0