hpsa - HP Smart Array SCSI driver
HPSA-Specific Host Attribute Files in /sys
HPSA-Specific Disk Attribute Files in /sys
Supported ioctl() operations
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.
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
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 Arrays option ROM at boot time.
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.
/sys/class/scsi_host/host*/rescan 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 HPs 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 pre-configured logical drives. /sys/class/scsi_host/host*/firmware_revision This attribute contains the firmware version of the Smart Array.
# cd /sys/class/scsi_host/host4 # cat firmware_revision 7.14
/sys/class/scsi_disk/c:b:t:l/device/unique_id This attribute contains a 32 hex-digit unique ID for each logical drive.
# cd /sys/class/scsi_disk/4:0:0:0/device # cat unique_id 600508B1001044395355323037570F77
/sys/class/scsi_disk/c:b:t:l/device/raid_level This attribute contains the RAID level of each logical drive.
# cd /sys/class/scsi_disk/4:0:0:0/device # cat raid_level RAID 0
/sys/class/scsi_disk/c:b:t:l/device/lunid 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.
# cd /sys/class/scsi_disk/4:0:0:0/device # cat lunid 0x0000004000000000
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.
CCISS_DEREGDISK, CCISS_REGNEWDISK, CCISS_REGNEWD 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. CCISS_GETPCIINFO Returns PCI domain, bus, device and function and "board ID" (PCI subsystem ID). CCISS_GETDRIVVER Returns driver version in three bytes encoded as:
(major_version << 16) | (minor_version << 8) |
CCISS_PASSTHRU, CCISS_BIG_PASSTHRU 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, etc. 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 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.