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SSADISK_ISAL_CMD (ISAL Command) SSA Disk Device Driver ioctl Operation
Purpose
To provide a method of sending Independent Network Storage Access Language (ISAL)
commands to an SSA physical or logical disk drive. ISAL consists of a set of commands
that allow a program to control and access a storage device.
The ISAL command set is described in the Technical Reference for the adapter.
Description
The SSADISK_ISAL_CMD operation allows the caller to issue an ISAL command to a
selected logical or physical disk drive. The caller must be root, or have an effective user
ID of root, to issue this ioctl.
The following ISAL commands (minor function codes) that are defined in the
/usr/include/ipn/ipnsal.h file can be issued:
FN_ISAL_Read
FN_ISAL_Format
FN_ISAL_Lock
FN_ISAL_Test
FN_ISAL_Download
Notes:
1. Some of these commands are not valid for SSA hdisks, but are valid for SSA
pdisks; others are valid for SSA hdisks, but are not valid for SSA pdisks. The
adapter card (not the device driver) checks whether the commands are valid. If the
caller attempts to send a command to a device for which that command is not valid,
the adapter returns a non-zero result. The exception to this procedure occurs when
any attempt is made to send a FN_ISAL_Fence command to a SSA physical disk.
The device driver rejects any such attempt with EINVAL.
2. The adapter rejects the FN_ISAL_SCSI command with a non-zero result if that
command is sent to a device that has not been opened with the
SSADISK_SCSIMODE extension parameter.
The arg parameter for the SSADISK_ISAL_CMD ioctl is the address of an
ssadisk_ioctl_parms structure. This structure is defined in the
/usr/include/sys/ssadisk.h file.
278
User's Guide and Maintenance Information
FN_ISALWrite
FN_ISAL_Progress
FN_ISAL_Unlock
FN_ISAL_SCSI
FN_ISAL_Fence
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