scu(7D) Devices scu(7D)NAMEscu - Intel SAS2.0 storage controller unit driver
SYNOPSIS
scsi@unit-address
DESCRIPTION
The scu driver is a SCSAv3 compliant SAS2.0 driver.
The Intel scu host bus adapter driver is a nexus driver that is SAS 2.0
and SATA 3 compliant. It supports multiple operation modes including
SSP, STP, SMP initiator, SMP target and SATA host operations. scu is
integrated into the south bridge- Patsburg, providing 1.5/3/6 Gb/s link
operations for SAS and SATA, and also supports wide ports up to X4.
The scu driver is SCSA v3 compliant, and it has advanced features pro‐
vided by SCSA v3 including flexible iport attach/detach, hot plug func‐
tionality, and MPxIO capability. Besides the basic SAS/SATA I/O, the
driver also supports expander, FMA, fast reboot, suspend/resume, and
smhba.
Configuration
The scu driver is configured by defining properties in the scu.conf
file. These properties override the global SCSI settings.
The scu driver supports the following properties:
mpxio-disable
Solaris I/O multipathing is enabled or disabled on SAS devices with
the mpxio-disable property. Specifying mpxio-disable="no" activates
I/O multipathing. mpxio-disable="yes" disables I/O multipathing.
Solaris I/O multipathing can be enabled or disabled on a per port
basis. Per port settings override the global setting for the speci‐
fied ports.
The following example shows how to disable multipathing on port 0,
whose parent is /pci@0,0/pci8086,2940@1c/pci1000,72@0:
name="scu" parent="/pci@0,0/pci8086,3c02@1c/pci8086,1d60@0"
mpxio-disable="yes";
is-sata-ncq-enabled
Set 1 to enable the SATA NCQ feature, and disable otherwise.
max-ncq-depth
Set the NCQ depth to n. The maximum value is 32.
max-speed-generation
Set the speed for PHY/port, the default is 2. 2, indicates 3.0
Gb/s. 1 indicates 1.5 Gb/s.
FILES
/kernel/drv/scu 32-bit ELF kernel module
/kernel/drv/amd64/scu 64-bit x86 ELF kernel module
/kernel/drv/scu.conf Optional configuration file
ATTRIBUTES
See attributes(5) for a description of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ATTRIBUTE TYPE │ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │x86 │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOprtconf(1M), driver.conf(4), pci(4), attributes(5), scsi_abort(9F),
scsi_hba_attach_setup(9F), scsi_ifgetcap(9F), scsi_ifset‐
cap(9F),scsi_reset(9F), scsi_sync_pkt(9F), scsi_transport(9F),
scsi_device(9S), scsi_extended_sense(9S), scsi_inquiry(9S),
scsi_pkt(9S)SunOS 5.10 10 Feb 2012 scu(7D)
