Updating the information about SCSI devices

6.10 LPAR mode z/VM guest

Use the rescan attribute of the SCSI device to detect changes to a storage device on the storage server that are made after the device was discovered.

Before you begin

The FCP device must be online.

About this task

The initial information about the available SCSI devices is discovered automatically when LUNs first become available.

Procedure

To update the information about a SCSI device issue a command of this form: 
# echo <string> > /sys/bus/scsi/devices/<scsi_host_no>:0:<scsi_id>:<scsi_lun>/rescan
where:
<string>
is any alphanumeric string.
<scsi_host_no>
is the SCSI host number that corresponds to the FCP device.
<scsi_id>
is the SCSI ID of the target port.
<scsi_lun>
is the LUN of the SCSI device.

Example

In the following example, the information about a SCSI device 1:0:18:1086537744 is updated:

# echo 1 > /sys/bus/scsi/devices/1:0:18:1086537744/rescan