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z/VM: CP Commands and Utilities Reference - z/VM - IBM

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MODIFY DEVICE / IODEVICE<br />

MODIFY DEVICE / IODEVICE<br />

►►<br />

►<br />

IODC:<br />

Notes:<br />

MODify<br />

ADD<br />

DELete<br />

IODC<br />

Authorization<br />

Purpose<br />

Oper<strong>and</strong>s<br />

DEVice<br />

IODEVICE<br />

CU_number<br />

CUNUMBR<br />

(2)<br />

PARtition<br />

STATus_verification<br />

NOSTATus_verification<br />

Privilege Class: B<br />

Use MODIFY DEVICE or IODEVICE to change the definition of one or more<br />

existing real devices in the I/O configuration.<br />

Notes:<br />

1. MODIFY DEVICE <strong>and</strong> MODIFY IODEVICE are dynamic I/O comm<strong>and</strong>s.<br />

Dynamic I/O configuration is only supported on System/390 <strong>and</strong> zSeries<br />

processors. If your system is not running on one of these processors, your<br />

comm<strong>and</strong> will not complete successfully.<br />

2. You cannot modify an open systems adapter (OSA) device. If you need to<br />

change the definition of an OSA device, you must delete the device <strong>and</strong> define<br />

it again with the new information.<br />

rdev<br />

rdev<br />

rdev1-rdev2<br />

(1)<br />

▼ mmmm<br />

(3)<br />

▼ pname<br />

DASD<br />

NOTDASD<br />

UNIT_Address<br />

UNITADD<br />

TIME_Out<br />

NOTIME_Out<br />

1 You can specify a maximum of 8 control unit numbers.<br />

nn<br />

CU_number<br />

CUNUMBR<br />

nnnn<br />

CSS 0<br />

CSS<br />

(4)<br />

PREFerred_channel_path nn<br />

NOPREFerred_channel_path<br />

2 For processors in LPAR mode this oper<strong>and</strong> is required. Otherwise, it is not applicable <strong>and</strong> should not be<br />

specified.<br />

3 The maximum number of logical partition names you can specify depends on the capabilities of your<br />

processor.<br />

4 A preferred path must not be specified for a device connected to a control unit for which z/OS–managed<br />

paths are being used. Although the comm<strong>and</strong> will not prevent you from doing so, the use of preferred paths<br />

in a managed-path environment will adversely affect z/OS’s ability to manage channel-path workloads.<br />

610 z/<strong>VM</strong>: <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> <strong>and</strong> <strong>Utilities</strong> <strong>Reference</strong><br />

nn<br />

►<br />

►◄

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