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Technical Reference: Kernel and Subsystems, Volume 2
SCIOGTHW (Gathered Write) SCSI Adapter Device Driver ioctl Operation
Purpose
Allows the caller to verify that the SCSI adapter device
driver to which this device instance is attached supports gathered writes.
Description
This operation allows the caller to verify that the
gathered write function is supported by the SCSI adapter device driver before
the caller attempts such an operation. The SCIOGTHW
operation fails if a SCSI adapter device driver does not support gathered
writes.
The arg parameter to the SCIOGTHW operation is set to null by the caller to indicate
no input parameter is passed.
Note
This operation is not supported by all SCSI I/O Controllers.
If not supported, errno is set to EINVAL and a value of -1 is returned.
Return Values
When completed successfully, the SCIOGTHW operation returns a value of 0, meaning gathered writes are
supported. Otherwise, a value of -1 is returned and errno global variable is set to EINVAL.
Files
/dev/scsi0, /dev/scsi1,..., /dev/scsin |
Provide an interface to allow SCSI device drivers to access SCSI
devices or adapters. |
/dev/vscsi0, /dev/vscsi1,...,
/dev/vscsin |
Provide an interface to allow SCSI-2 Fast/Wide Adapter/A and SCSI-2 Differential Fast/Wide Adapter/A
device drivers to access SCSI devices or adapters. |
Related Information
SCSI Adapter device driver.
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