SCSI_TEST_UNIT_READY

Section: SCSI mid layer (9)
Updated: February 2011
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NAME

scsi_test_unit_ready - test if unit is ready

SYNOPSIS

int scsi_test_unit_ready(struct scsi_device * sdev, int timeout, int retries, struct scsi_sense_hdr * sshdr_external);

ARGUMENTS

sdev

: scsi device to change the state of.

timeout

: command timeout

retries

: number of retries before failing

sshdr_external

: Optional pointer to struct scsi_sense_hdr for returning sense. Make sure that this is cleared before passing in.

DESCRIPTION

Returns zero if unsuccessful or an error if TUR failed. For removable media, a return of NOT_READY or UNIT_ATTENTION is translated to success, with the ->changed flag updated.

AUTHORS

James Bottomley <James.Bottomley@hansenpartnership.com>

: Author.

Rob Landley <rob@landley.net>