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Section: Linux Programmer's Manual (4)
Updated: 2017-09-15
Index Return to Main Contents


hpsa - HP Smart Array SCSI driver  


modprobe hpsa [ hpsa_allow_any=1 ]


hpsa is a SCSI driver for HP Smart Array RAID controllers.  


hpsa_allow_any=1: This option allows the driver to attempt to operate on any HP Smart Array hardware RAID controller, even if it is not explicitly known to the driver. This allows newer hardware to work with older drivers. Typically this is used to allow installation of operating systems from media that predates the RAID controller, though it may also be used to enable hpsa to drive older controllers that would normally be handled by the cciss(4) driver. These older boards have not been tested and are not supported with hpsa, and cciss(4) should still be used for these.  

Supported hardware

The hpsa driver supports the following Smart Array boards:

    Smart Array P700M
    Smart Array P212
    Smart Array P410
    Smart Array P410i
    Smart Array P411
    Smart Array P812
    Smart Array P712m
    Smart Array P711m
    StorageWorks P1210m

Since Linux 4.14, the following Smart Array boards are also supported:

    Smart Array 5300
    Smart Array 5312
    Smart Array 532
    Smart Array 5i
    Smart Array 6400
    Smart Array 6400 EM
    Smart Array 641
    Smart Array 642
    Smart Array 6i
    Smart Array E200
    Smart Array E200i
    Smart Array E200i
    Smart Array E200i
    Smart Array E200i
    Smart Array E500
    Smart Array P400
    Smart Array P400i
    Smart Array P600
    Smart Array P700m
    Smart Array P800

Configuration details

To configure HP Smart Array controllers, use the HP Array Configuration Utility (either hpacuxe(8) or hpacucli(8)) or the Offline ROM-based Configuration Utility (ORCA) run from the Smart Array's option ROM at boot time.  



Device nodes

Logical drives are accessed via the SCSI disk driver (sd(4)), tape drives via the SCSI tape driver (st(4)), and the RAID controller via the SCSI generic driver (sg(4)), with device nodes named /dev/sd*, /dev/st*, and /dev/sg*, respectively.  

HPSA-specific host attribute files in /sys

This is a write-only attribute. Writing to this attribute will cause the driver to scan for new, changed, or removed devices (e.g., hot-plugged tape drives, or newly configured or deleted logical drives, etc.) and notify the SCSI midlayer of any changes detected. Normally a rescan is triggered automatically by HP's Array Configuration Utility (either the GUI or the command-line variety); thus, for logical drive changes, the user should not normally have to use this attribute. This attribute may be useful when hot plugging devices like tape drives, or entire storage boxes containing preconfigured logical drives.
This attribute contains the firmware version of the Smart Array.
For example:
# cd /sys/class/scsi_host/host4 # cat firmware_revision 7.14

HPSA-specific disk attribute files in /sys

This attribute contains a 32 hex-digit unique ID for each logical drive.
For example:
# cd /sys/class/scsi_disk/4:0:0:0/device # cat unique_id 600508B1001044395355323037570F77
This attribute contains the RAID level of each logical drive.
For example:
# cd /sys/class/scsi_disk/4:0:0:0/device # cat raid_level RAID 0
This attribute contains the 16 hex-digit (8 byte) LUN ID by which a logical drive or physical device can be addressed. c:b:t:l are the controller, bus, target, and lun of the device.

For example:

# cd /sys/class/scsi_disk/4:0:0:0/device # cat lunid 0x0000004000000000

Supported ioctl() operations

For compatibility with applications written for the cciss(4) driver, many, but not all of the ioctls supported by the cciss(4) driver are also supported by the hpsa driver. The data structures used by these ioctls are described in the Linux kernel source file include/linux/cciss_ioctl.h.
These three ioctls all do exactly the same thing, which is to cause the driver to rescan for new devices. This does exactly the same thing as writing to the hpsa-specific host "rescan" attribute.
Returns PCI domain, bus, device and function and "board ID" (PCI subsystem ID).
Returns driver version in three bytes encoded as:
(major_version << 16) | (minor_version << 8) |
Allows "BMIC" and "CISS" commands to be passed through to the Smart Array. These are used extensively by the HP Array Configuration Utility, SNMP storage agents, and so on. See cciss_vol_status at for some examples.


cciss(4), sd(4), st(4), cciss_vol_status(8), hpacucli(8), hpacuxe(8),

and Documentation/scsi/hpsa.txt and Documentation/ABI/testing/sysfs-bus-pci-devices-cciss in the Linux kernel source tree  


This page is part of release 4.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at



Supported hardware
Configuration details
Device nodes
HPSA-specific host attribute files in /sys
HPSA-specific disk attribute files in /sys
Supported ioctl() operations

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