6.3. Replacing operational or failed storage devices on IBM Z or IBM LinuxONE infrastructure

Procedure

1. List all the disks.

   $ lszdev

   Example output:

   TYPE         ID
   zfcp-host    0.0.8204                                        yes  yes
   zfcp-lun     0.0.8204:0x102107630b1b5060:0x4001402900000000 yes  no    sda sg0
   zfcp-lun     0.0.8204:0x500407630c0b50a4:0x3002b03000000000  yes  yes   sdb sg1
   qeth         0.0.bdd0:0.0.bdd1:0.0.bdd2                      yes  no    encbdd0
   generic-ccw  0.0.0009                                        yes  no

   A SCSI disk is represented as a zfcp-lun with the structure <device-id>:<wwpn>:<lun-id> in the ID section. The first disk is used for the operating system. If one storage device fails, you can replace it with a new disk.

2. Remove the disk.

   Run the following command on the disk, replacing scsi-id with the SCSI disk identifier of the disk to be replaced:

   $ chzdev -d scsi-id

   For example, the following command removes one disk with the device ID 0.0.8204, the WWPN 0x500507630a0b50a4, and the LUN 0x4002403000000000:

   $ chzdev -d 0.0.8204:0x500407630c0b50a4:0x3002b03000000000

3. Append a new SCSI disk.

   $ chzdev -e 0.0.8204:0x500507630b1b50a4:0x4001302a00000000

   참고

   The device ID for the new disk must be the same as the disk to be replaced. The new disk is identified with its WWPN and LUN ID.

4. List all the FCP devices to verify the new disk is configured.

   $ lszdev zfcp-lun

   Example output:

   TYPE         ID                                              ON   PERS  NAMES
   zfcp-lun     0.0.8204:0x102107630b1b5060:0x4001402900000000 yes  no    sda sg0
   zfcp-lun     0.0.8204:0x500507630b1b50a4:0x4001302a00000000  yes  yes   sdb sg1