Hot plugging of SCSI tape drives is supported, with some caveats.
The cciss driver must be informed that changes to the SCSI bus
-have been made, in addition to and prior to informing the SCSI
-mid layer. This may be done via the /proc filesystem. For example:
+have been made. This may be done via the /proc filesystem.
+For example:
echo "rescan" > /proc/scsi/cciss0/1
-This causes the adapter to query the adapter about changes to the
-physical SCSI buses and/or fibre channel arbitrated loop and the
+This causes the driver to query the adapter about changes to the
+physical SCSI buses and/or fibre channel arbitrated loop and the
driver to make note of any new or removed sequential access devices
or medium changers. The driver will output messages indicating what
devices have been added or removed and the controller, bus, target and
-lun used to address the device. Once this is done, the SCSI mid layer
-can be informed of changes to the virtual SCSI bus which the driver
-presents to it in the usual way. For example:
-
- echo scsi add-single-device 3 2 1 0 > /proc/scsi/scsi
-
-to add a device on controller 3, bus 2, target 1, lun 0. Note that
-the driver makes an effort to preserve the devices positions
-in the virtual SCSI bus, so if you are only moving tape drives
-around on the same adapter and not adding or removing tape drives
-from the adapter, informing the SCSI mid layer may not be necessary.
+lun used to address the device. It then notifies the SCSI mid layer
+of these changes.
Note that the naming convention of the /proc filesystem entries
contains a number in addition to the driver name. (E.g. "cciss0"
git.openpandora.org / pandora-kernel.git / blobdiff