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

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DISCARD PINNED<br />

►►<br />

DISCARD<br />

Authorization<br />

Purpose<br />

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

Usage Notes<br />

Responses<br />

PINNED<br />

ALL<br />

CACHEFW<br />

Privilege Class: B<br />

Use DISCARD PINNED to discard pinned data that is stored in a subsystem cache<br />

or nonvolatile storage (NVS). This comm<strong>and</strong> is valid for cache storage subsystems<br />

that support the cache fast write or DASD fast write functions.<br />

ALL<br />

indicates that all pinned data for the specified devices is to be discarded.<br />

CACHEFW<br />

indicates that only pinned cache fast write data for the specified devices is to be<br />

discarded.<br />

Note: For RAID architecture storage subsystems that emulate a 3990 control<br />

unit with enhanced functions, this oper<strong>and</strong> is being allowed for<br />

compatability. Using the CACHEFW oper<strong>and</strong> will have the same effect<br />

as the ALL oper<strong>and</strong>. All pinned data will be discarded.<br />

rdev<br />

rdev1-rdev2<br />

is the real device number, a list of real device numbers, or a range of real<br />

device numbers of devices for which data is to be discarded.<br />

1. The DISCARD PINNED comm<strong>and</strong> is only valid for cache storage subsystems<br />

that support the cache fast write or DASD fast write functions. An error message<br />

is generated if the specified subsystem does not support any of these functions.<br />

2. This comm<strong>and</strong> is used as a recovery tool to remove pinned data from cache<br />

<strong>and</strong> nonvolatile storage (NVS).<br />

3. Attention: This comm<strong>and</strong> results in a loss of data. Incorrect use of this<br />

comm<strong>and</strong> can result in unintended loss of data.<br />

4. This comm<strong>and</strong> may be issued to offline devices.<br />

Response 1:<br />

▼ rdev<br />

rdev1-rdev2<br />

The following response is displayed for each specified device when you enter<br />

DISCARD PINNED ALL:<br />

rdev Pinned data has been discarded.<br />

DISCARD PINNED<br />

►◄<br />

Chapter 2. <strong>CP</strong> <strong>Comm<strong>and</strong>s</strong> 277

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