svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.
scsi_vhci(4d)
scsi_vhci(4D) Device Drivers & /dev files scsi_vhci(4D)
NAME
scsi_vhci - SCSI virtual host controller interconnect driver
DESCRIPTION
The scsi_vhci driver is a SCSA compliant pseudo nexus driver that sup‐
ports Solaris operating system I/O multipathing services for SCSI-3 de‐
vices. This driver introduces a fundamental restructuring of the So‐
laris device tree to enable a multipath device to be represented as
single device instance rather than as an instance per physical path as
in earlier Solaris versions.
The logical units (LUNs) associated multipath SCSI target devices man‐
aged by this driver are identified and represented by using the SCSI-3
VPD page (0x83) LUN global unique identifier (GUID) represented as
hexadecimal number (64/128 bits)
Symbolic links in /dev/[r]dsk and /dev/scsi/changer continue to adhere
to the cNtNdNsN format. cN is the logical controller number assigned to
this driver instance. tN is the GUID.
Symbolic links in /dev/rmt/#[l|m|h|c|u],[b],[n] also adhere to the same
format as non-multipath devices. Because of persistent binding of tape
devices, you may want to remove old non-multipath links when enabling
them for multipath.
The following is an example of a system with an A5000 storage array:
...
/dev/rdsk/c4t200000203709C3F5d0s0 -> ../../devices/
scsi_vhci/ssd@g200000203709c3f5:a,raw
...
/dev/rdsk/c4t200000203709C3F5d0s7 -> ../../devices/
scsi_vhci/ssd@g200000203709c3f5:h,ra
...
The following is an example of a system with a T300 storage array:
...
/dev/rdsk/c1t60020F200000033939C2C2B60008D4AEd0s0 ->
../../devices/scsi_vhci/
ssd@g60020f200000033939a2c2b60008d4ae:a,raw
...
/dev/rdsk/c1t60020F200000033939A2C2B60008D4AEd0s7 ->
../../devices/scsi_vhci/
ssd@g60020f200000033939a2c2b60008d4ae:h,raw
The scsi_vhci driver receives naming and transport services from one or
more physical HBA (host bus adapter) devices. To support multi-pathing,
a physical HBA driver must have its multipathing enabled and comply
with the multipathing services provided by this driver.
The scsi_vhci driver supports the standard functions provided by the
SCSA interface.
Configuration
For each candidate SCSI target device, the scsi_vhci code must identify
a failover module to support the device. If a failover module can't be
identified, the device will not function under scsi_vhci multipathing
control. For SCSI target devices that support the standard Target Port
Group Select, no special vendor/product knowledge is needed. For other
SCSI target devices, each failover module understands which devices it
supports.
When autoconfiguration does not result in the desired configuration, a
vendor/product specific override mechanism is available. This
scsi_vhci.conf base mechanism can be used to direct a device to a spe‐
cific failover module (or to indicate that a device should not be under
scsi_vhci multipathing control by way of NONE). In scsi_vhci.conf, the
property 'scsi-vhci-failover-override' defines overrides in
scsi_get_device_type_string(9F) form. To add a third-party (non-Oracle)
symmetric storage device to run under scsi_vhci (and thereby take ad‐
vantage of scsi_vhci multipathing), you add the vendor ID and product
ID for the device, as those strings are returned by the SCSI Inquiry
command. For example, to add a device from a vendor with the ID of
"Acme" and a product ID of "MSU", you would add:
scsi-vhci-failover-override =
"Acme MSU", "f_sym",
In addition to "Acme", you also might want to add another entry, for
example, a device from "XYZ" vendor with a product ID of "ABC":
scsi-vhci-failover-override =
"Acme MSU", "f_sym",
"XYZ ABC", "f_sym";
As a last override, you might add an entry so that no devices from
"ABC" vendor use scsi_vhci multipathing:
scsi-vhci-failover-override =
"Acme MSU", "f_sym",
"XYZ ABC", "f_sym",
"ABC ", "NONE";
In every entry of scsi-vhci-failover-override, if the vendor ID is less
than 8 characters, it must be padded with spaces (ASCII 0x20) to 8
characters. The product ID contains at most sixteen left-adjusted ASCII
characters. The product ID has an implicit wild card rule. The product
ID in the returned SCSI inquiry string is considered a match if that
has the specified product ID as its prefix. For example,
scsi-vhci-failover-override =
"XYZ ABC", "f_sym";
will match both product ID ABC3000 and ABC4500 below from vendor XYZ.
"XYZ ABC3000", "f_sym"
"XYZ ABC4500", "f_sym"
FILES
/kernel/drv/amd64/scsi_vhci
64-bit kernel module (x86).
/kernel/drv/sparcv9/scsi_vhci
64-bit kernel module (SPARC).
/kernel/drv/scsi_vhci.conf
Driver configuration file.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ ArchitectureSPARC, x86 _ Availabilitysystem/kernel
SEE ALSO
fcp(4D), fctl(4D), fp(4D), mpt(4D), sd(4D), sgen(4D), ssd(4D), st(4D),
attributes(7), eeprom(8), mpathadm(8), prtconf(8), stmsboot(8),
scsi_abort(9F), scsi_get_device_type_scsi_options(9F), scsi_get_de‐
vice_type_string(9F), scsi_ifgetcap(9F), scsi_reset(9F), scsi_trans‐
port(9F), scsi_extended_sense(9S), scsi_inquiry(9S), scsi_pkt(9S)
Writing Device Drivers in Oracle Solaris 11.4
Small Computer System Interface-3 (SCSI-3)
NOTES
Each LUN can support a maximum of 64 physical paths.
In previous releases, the scsi_vhci.conf file supported the mpxio-dis‐
able property, which allowed you to disable Solaris I/O multipathing on
a system-wide basis. This property is not present in the current re‐
lease of the Solaris operating system. Multipathing is always enabled
in scsi_vhci. If you want to disable multipathing, use the mechanisms
provided by the HBA drivers. See fp(4D) and mpt(4D).
In previous releases, the override mechanism was based on the
scsi_get_device_type_scsi_options(9F) defined "device-type-scsi-op‐
tions-list" property. During upgrade, scsi_vhci.conf is converted to
the new form. After upgrade, a scsi_vhci.conf modification based on the
old mechanism is silently ignored.
In previous releases, Solaris I/O multipathing was also known as MPxIO
and Sun StorEdge Traffic Manager (STMS).
Oracle Solaris 11.4 15 Mar 2024 scsi_vhci(4D)