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diff --git a/man/man4/cciss.4 b/man/man4/cciss.4 new file mode 100644 index 000000000..a3fadb5d1 --- /dev/null +++ b/man/man4/cciss.4 @@ -0,0 +1,385 @@ +'\" t +.\" Copyright (C) 2011, Hewlett-Packard Development Company, L.P. +.\" Written by Stephen M. Cameron <scameron@beardog.cce.hp.com> +.\" +.\" SPDX-License-Identifier: GPL-2.0-only +.\" +.\" shorthand for double quote that works everywhere. +.ds q \N'34' +.TH cciss 4 (date) "Linux man-pages (unreleased)" +.SH NAME +cciss \- HP Smart Array block driver +.SH SYNOPSIS +.nf +modprobe cciss [ cciss_allow_hpsa=1 ] +.fi +.SH DESCRIPTION +.\" commit 253d2464df446456c0bba5ed4137a7be0b278aa8 +.BR Note : +This obsolete driver was removed in Linux 4.14, +as it is superseded by the +.BR hpsa (4) +driver in newer kernels. +.P +.B cciss +is a block driver for older HP Smart Array RAID controllers. +.SS Options +.IR "cciss_allow_hpsa=1" : +This option prevents the +.B cciss +driver from attempting to drive any controllers that the +.BR hpsa (4) +driver is capable of controlling, which is to say, the +.B cciss +driver is restricted by this option to the following controllers: +.P +.nf + Smart Array 5300 + Smart Array 5i + Smart Array 532 + Smart Array 5312 + Smart Array 641 + Smart Array 642 + Smart Array 6400 + Smart Array 6400 EM + Smart Array 6i + Smart Array P600 + Smart Array P400i + Smart Array E200i + Smart Array E200 + Smart Array E200i + Smart Array E200i + Smart Array E200i + Smart Array E500 +.fi +.SS Supported hardware +The +.B cciss +driver supports the following Smart Array boards: +.P +.nf + Smart Array 5300 + Smart Array 5i + Smart Array 532 + Smart Array 5312 + Smart Array 641 + Smart Array 642 + Smart Array 6400 + Smart Array 6400 U320 Expansion Module + Smart Array 6i + Smart Array P600 + Smart Array P800 + Smart Array E400 + Smart Array P400i + Smart Array E200 + Smart Array E200i + Smart Array E500 + Smart Array P700m + Smart Array P212 + Smart Array P410 + Smart Array P410i + Smart Array P411 + Smart Array P812 + Smart Array P712m + Smart Array P711m +.fi +.SS Configuration details +To configure HP Smart Array controllers, +use the HP Array Configuration Utility +(either +.BR hpacuxe (8) +or +.BR hpacucli (8)) +or the Offline ROM-based Configuration Utility (ORCA) +run from the Smart Array's option ROM at boot time. +.SH FILES +.SS Device nodes +The device naming scheme is as follows: +.P +Major numbers: +.IP +.TS +r r. +104 cciss0 +105 cciss1 +106 cciss2 +105 cciss3 +108 cciss4 +109 cciss5 +110 cciss6 +111 cciss7 +.TE +.P +Minor numbers: +.P +.EX + b7 b6 b5 b4 b3 b2 b1 b0 + |\-\-\-\-+\-\-\-\-| |\-\-\-\-+\-\-\-\-| + | | + | +\-\-\-\-\-\-\-\- Partition ID (0=wholedev, 1\-15 partition) + | + +\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Logical Volume number +.EE +.P +The device naming scheme is: +.TS +li l. +/dev/cciss/c0d0 Controller 0, disk 0, whole device +/dev/cciss/c0d0p1 Controller 0, disk 0, partition 1 +/dev/cciss/c0d0p2 Controller 0, disk 0, partition 2 +/dev/cciss/c0d0p3 Controller 0, disk 0, partition 3 +\& +/dev/cciss/c1d1 Controller 1, disk 1, whole device +/dev/cciss/c1d1p1 Controller 1, disk 1, partition 1 +/dev/cciss/c1d1p2 Controller 1, disk 1, partition 2 +/dev/cciss/c1d1p3 Controller 1, disk 1, partition 3 +.TE +.SS Files in /proc +The files +.I /proc/driver/cciss/cciss[0\-9]+ +contain information about +the configuration of each controller. +For example: +.P +.in +4n +.EX +$ \fBcd /proc/driver/cciss\fP +$ \fBls \-l\fP +total 0 +-rw\-r\-\-r\-\- 1 root root 0 2010\-09\-10 10:38 cciss0 +-rw\-r\-\-r\-\- 1 root root 0 2010\-09\-10 10:38 cciss1 +-rw\-r\-\-r\-\- 1 root root 0 2010\-09\-10 10:38 cciss2 +$ \fBcat cciss2\fP +cciss2: HP Smart Array P800 Controller +Board ID: 0x3223103c +Firmware Version: 7.14 +IRQ: 16 +Logical drives: 1 +Current Q depth: 0 +Current # commands on controller: 0 +Max Q depth since init: 1 +Max # commands on controller since init: 2 +Max SG entries since init: 32 +Sequential access devices: 0 +\& +cciss/c2d0: 36.38GB RAID 0 +.EE +.in +.\" +.SS Files in /sys +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /model +Displays the SCSI INQUIRY page 0 model for logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /rev +Displays the SCSI INQUIRY page 0 revision for logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /unique_id +Displays the SCSI INQUIRY page 83 serial number for logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /vendor +Displays the SCSI INQUIRY page 0 vendor for logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /block:cciss!c X d Y +A symbolic link to +.IR /sys/block/cciss!c X d Y. +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /rescan +When this file is written to, the driver rescans the controller +to discover any new, removed, or modified logical drives. +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /resettable +A value of 1 displayed in this file indicates that +the "reset_devices=1" kernel parameter (used by +.BR kdump ) +is honored by this controller. +A value of 0 indicates that the +"reset_devices=1" kernel parameter will not be honored. +Some models of Smart Array are not able to honor this parameter. +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /lunid +Displays the 8-byte LUN ID used to address logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /raid_level +Displays the RAID level of logical drive +.I Y +of controller +.IR X . +.TP +.IR /sys/bus/pci/devices/ dev /cciss X /c X d Y /usage_count +Displays the usage count (number of opens) of logical drive +.I Y +of controller +.IR X . +.SS SCSI tape drive and medium changer support +SCSI sequential access devices and medium changer devices are supported and +appropriate device nodes are automatically created (e.g., +.IR /dev/st0 , +.IR /dev/st1 , +etc.; see +.BR st (4) +for more details.) +You must enable "SCSI tape drive support for Smart Array 5xxx" and +"SCSI support" in your kernel configuration to be able to use SCSI +tape drives with your Smart Array 5xxx controller. +.P +Additionally, note that the driver will not engage the SCSI core at +init time. +The driver must be directed to dynamically engage the SCSI core via the +.I /proc +filesystem entry, +which the "block" side of the driver creates as +.I /proc/driver/cciss/cciss* +at run time. +This is because at driver init time, +the SCSI core may not yet be initialized (because the driver is a block +driver) and attempting to register it with the SCSI core in such a case +would cause a hang. +This is best done via an initialization script +(typically in +.IR /etc/init.d , +but could vary depending on distribution). +For example: +.P +.in +4n +.EX +for x in /proc/driver/cciss/cciss[0\-9]* +do + echo "engage scsi" > $x +done +.EE +.in +.P +Once the SCSI core is engaged by the driver, it cannot be disengaged +(except by unloading the driver, if it happens to be linked as a module.) +.P +Note also that if no sequential access devices or medium changers are +detected, the SCSI core will not be engaged by the action of the above +script. +.SS Hot plug support for SCSI tape drives +Hot plugging of SCSI tape drives is supported, with some caveats. +The +.B cciss +driver must be informed that changes to the SCSI bus +have been made. +This may be done via the +.I /proc +filesystem. +For example: +.IP +echo "rescan" > /proc/scsi/cciss0/1 +.P +This causes the driver to: +.RS +.IP (1) 5 +query the adapter about changes to the +physical SCSI buses and/or fiber channel arbitrated loop, and +.IP (2) +make note of any new or removed sequential access devices +or medium changers. +.RE +.P +The driver will output messages indicating which +devices have been added or removed and the controller, bus, target, and +lun used to address each device. +The driver then notifies the SCSI midlayer +of these changes. +.P +Note that the naming convention of the +.I /proc +filesystem entries +contains a number in addition to the driver name +(e.g., "cciss0" +instead of just "cciss", which you might expect). +.P +Note: +.I Only +sequential access devices and medium changers are presented +as SCSI devices to the SCSI midlayer by the +.B cciss +driver. +Specifically, physical SCSI disk drives are +.I not +presented to the SCSI midlayer. +The only disk devices that are presented to the kernel are logical +drives that the array controller constructs from regions on +the physical drives. +The logical drives are presented to the block layer +(not to the SCSI midlayer). +It is important for the driver to prevent the kernel from accessing the +physical drives directly, since these drives are used by the array +controller to construct the logical drives. +.SS SCSI error handling for tape drives and medium changers +The Linux SCSI midlayer provides an error-handling protocol that +is initiated whenever a SCSI command fails to complete within a +certain amount of time (which can vary depending on the command). +The +.B cciss +driver participates in this protocol to some extent. +The normal protocol is a four-step process: +.IP (1) 5 +First, the device is told to abort the command. +.IP (2) +If that doesn't work, the device is reset. +.IP (3) +If that doesn't work, the SCSI bus is reset. +.IP (4) +If that doesn't work, the host bus adapter is reset. +.P +The +.B cciss +driver is a block +driver as well as a SCSI driver and only the tape drives and medium +changers are presented to the SCSI midlayer. +Furthermore, unlike more +straightforward SCSI drivers, disk I/O continues through the block +side during the SCSI error-recovery process. +Therefore, the +.B cciss +driver implements only the first two of these actions, +aborting the command, and resetting the device. +Note also that most tape drives will not oblige +in aborting commands, and sometimes it appears they will not even +obey a reset command, though in most circumstances they will. +If the command cannot be aborted and the device cannot be +reset, the device will be set offline. +.P +In the event that the error-handling code is triggered and a tape drive is +successfully reset or the tardy command is successfully aborted, the +tape drive may still not allow I/O to continue until some command +is issued that positions the tape to a known position. +Typically you must rewind the tape (by issuing +.I "mt \-f /dev/st0 rewind" +for example) before I/O can proceed again to a tape drive that was reset. +.SH SEE ALSO +.BR hpsa (4), +.BR cciss_vol_status (8), +.BR hpacucli (8), +.BR hpacuxe (8) +.P +.UR http://cciss.sf.net +.UE , +and +.I Documentation/blockdev/cciss.txt +and +.I Documentation/ABI/testing/sysfs\-bus\-pci\-devices\-cciss +in the Linux kernel source tree +.\" .SH AUTHORS +.\" Don Brace, Steve Cameron, Chase Maupin, Mike Miller, Michael Ni, +.\" Charles White, Francis Wiran +.\" and probably some other people. |