lsm_volume_write_cache_policy_update man page

lsm_volume_write_cache_policy_update — Change RAM write cache policy of the specified volume

Synopsis

int lsm_volume_write_cache_policy_update (lsm_connect *conn, lsm_volume *volume, uint32_t wcp, lsm_flag flags);

Arguments

conn

Valid lsm_connect pointer.

volume

A single lsm_volume

wcp

uint32_t. Write cache policy. Valid values are: * LSM_VOLUME_WRITE_CACHE_POLICY_WRITE_BACK
  Change to write back mode. * LSM_VOLUME_WRITE_CACHE_POLICY_AUTO
  Change to auto mode: use write back mode when battery/capacitor
  is healthy, otherwise use write through. * LSM_VOLUME_WRITE_CACHE_POLICY_WRITE_THROUGH
  Change to write through mode.

flags

Reserved for future use, must be LSM_CLIENT_FLAG_RSVD.

Version

1.3

Description

Change the RAM write cache policy on specified volume. If LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_IMPACT_READ is supported(e.g. HPE SmartArray), the changes on write cache policy might also impact read cache policy. If LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_WB_IMPACT_OTHER is supported(e.g. HPE SmartArray), changing write cache policy to write back mode might impact other volumes in the same system.

Capability

LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_AUTO LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_WRITE_BACK LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_WRITE_THROUGH LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_WB_IMPACT_OTHER LSM_CAP_VOLUME_WRITE_CACHE_POLICY_UPDATE_IMPACT_READ

Return

LSM_ERR_OK on success else error reason
   * LSM_ERR_OK
       On success.
   * LSM_ERR_NOT_FOUND_VOLUME
       When volume not found.
   * LSM_ERR_INVALID_ARGUMENT
       When any argument is NULL or invalid flags.
   * LSM_ERR_NO_SUPPORT
       Not supported.

Info

lsm_volume_write_cache_policy_update October 2017 Libstoragemgmt C API Manual