INSTALL command—CKD

Versions: MVS VSE CMS SA

The INSTALL command is an enhanced installation procedure that includes the writing of home address and record 0 on every track of a 3380, 3390, and 9345 volume. You issue INSTALL before formatting 3380, 3390, and 9345 volumes on:

  • A new DASD unit
  • Replaced or upgraded HDA
  • A DASD unit that has been physically relocated

For an example of using the INSTALL command on a new device, see Installing a device from the factory.

If you are installing a new 9345 device, you might not need to run the INSTALL command. Your IBM customer engineer will run a Track Center Test during the install process and give you a list of device addresses against which you need to run the INSTALL command. If no 9345 devices need the INSTALL command run, you are ready to format the device for your operating environment.

You also use the INSTALL command to change the mode of IBM 3390 or 9391 volumes to 3380 track compatibility mode (3380 track format). The 3390-9 and 9394 do not support 3380 track compatibility mode.

The INSTALL command is valid on IBM 3380, 3390, and 9345 volumes. If INSTALL is needed on dual copy volumes, the pair must be broken.

The INSTALL command is not recommended for use on the 9394.

The INSTALL command is not supported on 9393, 2105, 2107, and 1750 devices.

For information on ICKDSF support of the RAMAC family of devices, see ICKDSF support of the RAMAC Array family.

For information on ICKDSF support of the Internal Disk devices, see ICKDSF support of the Internal Disk.

Version: CMS
When you are using the CMS version of ICKDSF, the INSTALL command is valid only with dedicated devices. For more information, see Getting started with the CMS version.

Warning

After the install process is complete, you must initialize the volume for use in your operating environment. To initialize your volume, use the:

  • INIT command for MVS or VSE
  • CPVOLUME command for VM
  • AIXVOL command for AIX

Note: In MVS or VSE, if you want to erase the FFVDP on the volume, use INIT VALIDATE NODATA command, or use the TRKFMT command.

Multiple concurrent ICKDSF jobs can cause contention for resources. This can occur when the number of ICKDSF jobs accessing devices on the same storage control or storage subsystem exceeds the number of paths to the devices. For example, if you are running in device level selection enhanced (DLSE) mode, the maximum number of copies you should use is four.