Serial Attached SCSI (SAS) support for the Linux kernel
PATCH 1/2 Serial Attached SCSI (SAS) support for the Linux kernel
This email shows an example of two domains.
The first domain has only two devices: the SAS initiator and a SAS end device (a disk).
The second domain has expanders, SAS disks, a SATA II disk and a SATAPI disk.
A succinct and full listings of the sysfs tree are shown using the tree(1) program.
Sample configuration
--------------------
Directly attached devices, cascaded expanders and wide ports
1. SAS disk on HA phy 0, forming a narrow port, port 0.
2. Expander on HA phys 4, 5, 6, and 7, forming
a wide port, port 1.
3. Port 0, narrow, of phy 0, is formed between
the host adapter and a SAS end device with SAS port identifier (aua/aka, SAS address) 500000e000031c12. This device has a single LU, with LUN 0, which is a disk device.
4. Port 1, wide, of phys 4, 5, 6 and 7, is formed between the Host adapter's phys 4-7 and the expander with SAS address 50001c1716010600, Expander A.
5. Expander A, 50001c1716010600, has 4 devices attached to it:
- An expander with SAS address 50001c1071609c00, expander B (using a 2 link wide port, see below).
- A SATA II disk, 50001c1716010603, using the expanders' STP/SATA bridge.
- An SES device, LUN 0 of 50001c171601060d.
- And a SAS disk, LUN 0 of 5000c50000513329.
6. Expander B, 50001c1071609c00, has 3 devices attached to it:
- A SATAPI device, 50001c1071609c02, using the expander's STP/SATA bridge.
- A SAS disk, LUN 0 of 5000c50000102a65.
- And an expander, 5005076a000001e0, expander C, (using a 2 link wide port, see below).
7. Expander C, 5005076a000001e0, has 3 devices attached to it:
- A SAS disk, LUN 0 of 5000c50000513385.
- An SES device, LUN 0 of 5005076a000001ed.
- A SAS disk, LUN 0 of 5c50000000409c11.
Succinct listing of the tree
----------------------------
tree -d /sys/devices/pci0000\:01/0000\:01\:04.0/host11/sas/ha
/sys/devices/pci0000:01/0000:01:04.0/host11/sas/ha
|-- phys
| |-- 0
| | `-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/0
| |-- 1
| |-- 2
| |-- 3
| |-- 4
| | `-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| |-- 5
| | `-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| |-- 6
| | `-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| `-- 7
| `-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
`-- ports
|-- 0
| |-- domain
| | `-- 500000e000031c12
| | `-- LUNS
| | `-- 0000000000000000
| `-- phys
| `-- 0 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/0
`-- 1
|-- domain
| `-- 50001c1716010600
| |-- 50001c1071609c00
| | |-- 50001c1071609c02
| | |-- 5000c50000102a65
| | | `-- LUNS
| | | `-- 0000000000000000
| | `-- 5005076a000001e0
| | |-- 5000c50000513385
| | | `-- LUNS
| | | `-- 0000000000000000
| | |-- 5005076a000001ed
| | | `-- LUNS
| | | `-- 0000000000000000
| | `-- 5c50000000409c11
| | `-- LUNS
| | `-- 0000000000000000
| |-- 50001c1716010603
| |-- 50001c171601060d
| | `-- LUNS
| | `-- 0000000000000000
| `-- 5000c50000513329
| `-- LUNS
| `-- 0000000000000000
`-- phys
|-- 4 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/4
|-- 5 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/5
|-- 6 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/6
`-- 7 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/752 directories
Full listing of the tree
------------------------
tree /sys/devices/pci0000\:01/0000\:01\:04.0/host11/sas/ha /sys/devices/pci0000:01/0000:01:04.0/host11/sas/ha
|-- device_name
|-- ha_name
|-- phys
| |-- 0
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/0
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 1
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 2
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 3
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 4
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 5
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| |-- 6
| | |-- class
| | |-- enabled
| | |-- id
| | |-- iproto
| | |-- linkrate
| | |-- oob_mode
| | |-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| | |-- role
| | |-- sas_addr
| | |-- tproto
| | `-- type
| `-- 7
| |-- class
| |-- enabled
| |-- id
| |-- iproto
| |-- linkrate
| |-- oob_mode
| |-- port -> ../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/ports/1
| |-- role
| |-- sas_addr
| |-- tproto
| `-- type
`-- ports
|-- 0
| |-- attached_port_identifier
| |-- class
| |-- domain
| | `-- 500000e000031c12
| | |-- LUNS
| | | `-- 0000000000000000
| | | |-- channel
| | | |-- id
| | | |-- inquiry_data
| | | |-- lun
| | | `-- task_management
| | |-- dev_type
| | |-- iproto
| | |-- iresp_timeout
| | |-- itnl_timeout
| | |-- linkrate
| | |-- max_linkrate
| | |-- min_linkrate
| | |-- pathways
| | |-- ready_led_meaning
| | |-- rl_wlun
| | |-- sas_addr
| | `-- tproto
| |-- id
| |-- iproto
| |-- oob_mode
| |-- phys
| | `-- 0 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/0
| |-- port_identifier
| `-- tproto `-- 1
|-- attached_port_identifier
|-- class
|-- domain
| `-- 50001c1716010600
| |-- 50001c1071609c00
| | |-- 50001c1071609c02
| | | |-- command_set
| | | |-- dev_type
| | | |-- firmware_rev
| | | |-- identify_device
| | | |-- identify_packet_device
| | | |-- iproto
| | | |-- linkrate
| | | |-- max_linkrate
| | | |-- min_linkrate
| | | |-- model_number
| | | |-- port_no
| | | |-- report_phy_sata_resp
| | | |-- sas_addr
| | | |-- serial_number
| | | `-- tproto
| | |-- 5000c50000102a65
| | | |-- LUNS
| | | | `-- 0000000000000000
| | | | |-- channel
| | | | |-- id
| | | | |-- inquiry_data
| | | | |-- lun
| | | | `-- task_management
| | | |-- dev_type
| | | |-- iproto
| | | |-- iresp_timeout
| | | |-- itnl_timeout
| | | |-- linkrate
| | | |-- max_linkrate
| | | |-- min_linkrate
| | | |-- pathways
| | | |-- ready_led_meaning
| | | |-- rl_wlun
| | | |-- sas_addr
| | | `-- tproto
| | |-- 5005076a000001e0
| | | |-- 5000c50000513385
| | | | |-- LUNS
| | | | | `-- 0000000000000000
| | | | | |-- channel
| | | | | |-- id
| | | | | |-- inquiry_data
| | | | | |-- lun
| | | | | `-- task_management
| | | | |-- dev_type
| | | | |-- iproto
| | | | |-- iresp_timeout
| | | | |-- itnl_timeout
| | | | |-- linkrate
| | | | |-- max_linkrate
| | | | |-- min_linkrate
| | | | |-- pathways
| | | | |-- ready_led_meaning
| | | | |-- rl_wlun
| | | | |-- sas_addr
| | | | `-- tproto
| | | |-- 5005076a000001ed
| | | | |-- LUNS
| | | | | `-- 0000000000000000
| | | | | |-- channel
| | | | | |-- id
| | | | | |-- inquiry_data
| | | | | |-- lun
| | | | | `-- task_management
| | | | |-- dev_type
| | | | |-- iproto
| | | | |-- iresp_timeout
| | | | |-- itnl_timeout
| | | | |-- linkrate
| | | | |-- max_linkrate
| | | | |-- min_linkrate
| | | | |-- pathways
| | | | |-- ready_led_meaning
| | | | |-- rl_wlun
| | | | |-- sas_addr
| | | | `-- tproto
| | | |-- 5c50000000409c11
| | | | |-- LUNS
| | | | | `-- 0000000000000000
| | | | | |-- channel
| | | | | |-- id
| | | | | |-- inquiry_data
| | | | | |-- lun
| | | | | `-- task_management
| | | | |-- dev_type
| | | | |-- iproto
| | | | |-- iresp_timeout
| | | | |-- itnl_timeout
| | | | |-- linkrate
| | | | |-- max_linkrate
| | | | |-- min_linkrate
| | | | |-- pathways
| | | | |-- ready_led_meaning
| | | | |-- rl_wlun
| | | | |-- sas_addr
| | | | `-- tproto
| | | |-- change_count
| | | |-- component_id
| | | |-- component_revision_id
| | | |-- component_vendor_id
| | | |-- conf_route_table
| | | |-- configuring
| | | |-- dev_type
| | | |-- enclosure_logical_id
| | | |-- iproto
| | | |-- linkrate
| | | |-- max_linkrate
| | | |-- max_route_indexes
| | | |-- min_linkrate
| | | |-- num_phys
| | | |-- pathways
| | | |-- product_id
| | | |-- product_rev
| | | |-- sas_addr
| | | |-- smp_portal
| | | |-- tproto
| | | `-- vendor_id
| | |-- change_count
| | |-- component_id
| | |-- component_revision_id
| | |-- component_vendor_id
| | |-- conf_route_table
| | |-- configuring
| | |-- dev_type
| | |-- enclosure_logical_id
| | |-- iproto
| | |-- linkrate
| | |-- max_linkrate
| | |-- max_route_indexes
| | |-- min_linkrate
| | |-- num_phys
| | |-- pathways
| | |-- product_id
| | |-- product_rev
| | |-- sas_addr
| | |-- smp_portal
| | |-- tproto
| | `-- vendor_id
| |-- 50001c1716010603
| | |-- command_set
| | |-- dev_type
| | |-- firmware_rev
| | |-- identify_device
| | |-- identify_packet_device
| | |-- iproto
| | |-- linkrate
| | |-- max_linkrate
| | |-- min_linkrate
| | |-- model_number
| | |-- port_no
| | |-- report_phy_sata_resp
| | |-- sas_addr
| | |-- serial_number
| | `-- tproto
| |-- 50001c171601060d
| | |-- LUNS
| | | `-- 0000000000000000
| | | |-- channel
| | | |-- id
| | | |-- inquiry_data
| | | |-- lun
| | | `-- task_management
| | |-- dev_type
| | |-- iproto
| | |-- iresp_timeout
| | |-- itnl_timeout
| | |-- linkrate
| | |-- max_linkrate
| | |-- min_linkrate
| | |-- pathways
| | |-- ready_led_meaning
| | |-- rl_wlun
| | |-- sas_addr
| | `-- tproto
| |-- 5000c50000513329
| | |-- LUNS
| | | `-- 0000000000000000
| | | |-- channel
| | | |-- id
| | | |-- inquiry_data
| | | |-- lun
| | | `-- task_management
| | |-- dev_type
| | |-- iproto
| | |-- iresp_timeout
| | |-- itnl_timeout
| | |-- linkrate
| | |-- max_linkrate
| | |-- min_linkrate
| | |-- pathways
| | |-- ready_led_meaning
| | |-- rl_wlun
| | |-- sas_addr
| | `-- tproto
| |-- change_count
| |-- component_id
| |-- component_revision_id
| |-- component_vendor_id
| |-- conf_route_table
| |-- configuring
| |-- dev_type
| |-- enclosure_logical_id
| |-- iproto
| |-- linkrate
| |-- max_linkrate
| |-- max_route_indexes
| |-- min_linkrate
| |-- num_phys
| |-- pathways
| |-- product_id
| |-- product_rev
| |-- sas_addr
| |-- smp_portal
| |-- tproto
| `-- vendor_id
|-- id
|-- iproto
|-- oob_mode
|-- phys
| |-- 4 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/4
| |-- 5 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/5
| |-- 6 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/6
| `-- 7 -> ../../../../../../../../../devices/pci0000:01/0000:01:04.0/host11/sas/ha/phys/7
|-- port_identifier
`-- tproto
52 directories, 308 files