If the command cannot be aborted and the device cannot be reset, the device will be set offline. Hello, i have her a couple of server hp dl380 g5 with an smartarray p400 raidcontroller. Linux kernel documentation about kernel documentation. The device naming scheme is if youd like to contribute content, let us know.
Cciss scsi driver download if you would like to run hpsa instead, there is a new module parameter to cciss, cciss. Ive finally started to test the newer versions of redhat 6. Hp smartarray raid controllers linux driver differences cciss. Compaq cciss driver at the end of aacraid section is the old information on tools available on dell website, which may be useful for older distributions and controllers. This does exactly the same thing as writing to the hpsaspecific host rescan attribute. This new driver will support new smart array products going forward, and the cciss driver will eventually be deprecated. If you really want cciss on rhel7 checkout the elrepo directory a new smart array driver called hpsa has been accepted into the main line linux kernel as of dec 18, 2009, in linux2. Fix cciss scsi rescan code to better notice device changes.
Also, both ccciss drivers cciss ans hpsa was loaded. Possible use of driver for hp smartarray p400cciss. Linux kernel internals reference, wikibook under construction. A new smart array driver called hpsa has been accepted into the main line linux kernel as of dec 18, 2009, in linux2. Initially, there was some overlap in the boards which these two drivers support. Ordinarily, the driver is entirely interrupt driven. They serve as an access point to both the raid controllers, and to the. I would suggest disabling hardware raid and setting up software raid or no raid at all until the driver makes its way on the linux kernel, if it ever does. If you hotunplug a tape drive, then hotplug a different tape drive into the same slot in a storage enclosure, the cciss driver wouldnt notice anything had changed, as it was only looking at the lun address and device. Red hat enterprise linux 7 does not have the cciss driver. This splitbrained design of the cciss driver is a source of excess complexity and eliminating that complexity is one of the reasons for hpsa to exist.
In computing, a device driver is a computer program that operates or controls a particular type. Hp smartarray raid controllers linux driver differences. Each linux operating system handles the driver installation process a different way. Ldt linux driver template sample template of linux device driver for learning and starting source for a custom driver. Linux kernel cciss driver added dynamic outstanding command turning on a per controller basis. Smart array 5300 smart array 5i smart array 532 smart array 5312 smart array. Is this an outright mistake copied from the line for another device type. This driver is for compaqs smart array controllers. Cciss device driver the binary rpms created by the source rpms here do not do these things, they only build the driver module and initrd image. Note also that most tape drives will not oblige in aborting commands, and sometimes it appears. Hp smartarray raid controllers linux driver differences cciss versus hpsa ask question. For this reason, writing a device driver for linux requires performing a combined compilation with the kernel.
The logical disks were seen by the linux systems as devccissc0d0 for logical disk 1 and devccissc0d1 for logical disk 2. Red hat and suse include the hpsa driver as part of their standard enterprise linux distributions. The hpsa driver is an opensource linux device driver for hp smart array controllers. Adding a scsi tape drive using the cciss driver in sles. Mount cciss driver download the driver then notifies the scsi midlayer of these changes. Those cciss devices dont appear in mount command output. Actually cciss is both a block driver for logical drives and a scsi driver for tape drives. The primary benefit of running a driver in user mode is improved stability, since a poorly written usermode device driver. The makedev script can make device nodes for you automatically.
A customer reported that disks presented from hp smart array controllers using the cciss driver were not returning any information from the discovery linux disks probe. 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. The device tree is modified to match the compatible field, present in the driver. There is a bug that in the hpsa module that was introduced nov2016 as a fix for other problems the fix created a problem. Hpsa4 linux programmers manual hpsa4 name hpsa hp smart array scsi. You can find it in your kernel config under device driversblock devicescompaq smart array 5xxx support. The cciss driver is documented in the file usrsrc linux documentation cciss. This controller is not supportedby rh anymore by the current hpsadriver which is be the replacment vor the older ccissdriver in rh7, centos 6. I have an iio driver with me for opt3001 ambient light sensor, operating over the i2c bus, which has been compiled successfully in the kernel version 3. It is a scsi alternative to the cciss driver, which is a block driver. Second, most default linux drivers are open source and integrated into the system, which makes installing any drivers that are not included quite complicated, even though most hardware devices can be automatically detected. This option prevents the cciss driver from attempting to drive any controllers that the hpsa4 driver is capable of controlling, which is to say, the cciss driver is restricted by this option to the following controllers.
Because the cciss driver is a block 151 driver as well as a scsi driver and only the tape drives and medium 152 changers are presented to. Device drivers, particularly on modern microsoft windows platforms, can run in kernelmode ring 0 on x86 cpus or in usermode ring 3 on x86 cpus. Additionally, note that the driver will not engage the scsi core at init. If you would like to run hpsa instead, there is a new module parameter to cciss, cciss. How to use smartctl with cciss my guess would be that the raid controller has abstracted the individual disks, so it doesnt matter which logical disk you. Unlike its predecessor, the cciss driver, the hpsa driver presents logical disk devices in the standard. The cciss kernel module is a block device driver for hpcompaq smart arrays. How to access an iio device driver in linux stack overflow. If you really want cciss on rhel7 checkout the elrepo directory a new smart array driver called hpsa has been accepted into the main line linux kernel as of dec 18,in linux2. Is cciss controllers supported in red hat enterprise linux 7.
The discovery linux disks probe returns information for all ide and scsi based disk devices on the server being discovered. As for other options or settings for block device queues. The cciss driver has been removed from rhel7 and sles12. Puts devices in the standard dev namespace, which you already noticed.
Prevent cciss driver from accessing hardware known to be. Makedev cciss you need some entries in dev for the cciss device. This option prevents the cciss driver from attempting to drive any controllers that the hpsa4 driver is capable of controlling, which. In linux environments, programmers can build device drivers as parts of the kernel, separately as loadable modules.
The devccisscd0 device nodes of the cciss driver do double duty. The hpsa driver is a scsi driver, while the cciss driver is a block driver. This is the web site for the third edition of linux device drivers, by jonathan corbet, alessandro rubini, and greg kroahhartman. The system can also hang for indeterminate lengths of time. This obsolete driver was removed from the kernel in version 4. This allows newer hardware to work with older drivers.
Are cciss controllers supported in red hat enterprise linux 7. The 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 io continues through the block side during the scsi errorrecovery process therefore, the cciss driver implements only the first two of these actions, aborting the command, and resetting the device. Possible use of driver for hp smartarray p400cciss centos. They hope these examples will help you to get a better understanding of the linux system and. The difference between the two drivers can be summarized as follows. Details as to why this is the case can be found in the cciss. Products sold prior to the november 1, 2015 separation of hewlettpackard company into hewlett packard enterprise company and hp inc. Unlike its predecessor, the cciss driver, the hpsa driver presents logical disk devices in the standard scsi namespace. The first thing to note is that by default, the cciss driver will not identify a scsi tape device when booting the linux kernel. The hpsa driver now has support for all boards the cciss driver used to support, so this patch removes the cciss driver and make hpsa an alias to cciss. Another way around is to implement your driver as a kernel module, in which case you wont need to recompile the kernel to add another driver. My previous installs were in virtual hardware, so i didnt notice the raid controller driver change.
Supported hardware the hpsa driver supports the following smart array. Red hat enterprise linux 7 does not have the cciss driver red hat enterprise linux 7 fails to detect the p400 storage controller available with hp proliant dl380 g5. Dl380 g5 having hp smart array p400 controller and rhel4 update 4 dos not contain this driver. So the question is, is it possible to bring the ccissdriver in the pluskernel. Makedev cciss 44 45 you need some entries in dev for the cciss device. An introduction to hp smart array ccisshpsa drivers red.
702 822 65 1339 839 1146 506 336 314 645 105 1241 48 228 1388 1344 385 256 1245 980 355 831 348 1078 425 93 744 783 1055 915