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i2o_scsi_bios_param(9) [centos man page]

I2O_SCSI_BIOS_PARAM(9)					       Message-based devices					    I2O_SCSI_BIOS_PARAM(9)

NAME
i2o_scsi_bios_param - Invent disk geometry SYNOPSIS
int i2o_scsi_bios_param(struct scsi_device * sdev, struct block_device * dev, sector_t capacity, int * ip); ARGUMENTS
sdev scsi device dev block layer device capacity size in sectors ip geometry array DESCRIPTION
This is anyone's guess quite frankly. We use the same rules everyone else appears to and hope. It seems to work. COPYRIGHT
Kernel Hackers Manual 3.10 June 2014 I2O_SCSI_BIOS_PARAM(9)

Check Out this Related Man Page

SD(4)							     Linux Programmer's Manual							     SD(4)

NAME
sd - Driver for SCSI Disk Drives SYNOPSIS
#include <linux/hdreg.h> /* for HDIO_GETGEO */ #include <linux/fs.h> /* for BLKGETSIZE and BLKRRPART */ CONFIGURATION
The block device name has the following form: sdlp, where l is a letter denoting the physical drive, and p is a number denoting the parti- tion on that physical drive. Often, the partition number, p, will be left off when the device corresponds to the whole drive. SCSI disks have a major device number of 8, and a minor device number of the form (16 * drive_number) + partition_number, where drive_num- ber is the number of the physical drive in order of detection, and partition_number is as follows: partition 0 is the whole drive partitions 1-4 are the DOS "primary" partitions partitions 5-8 are the DOS "extended" (or "logical") partitions For example, /dev/sda will have major 8, minor 0, and will refer to all of the first SCSI drive in the system; and /dev/sdb3 will have major 8, minor 19, and will refer to the third DOS "primary" partition on the second SCSI drive in the system. At this time, only block devices are provided. Raw devices have not yet been implemented. DESCRIPTION
The following ioctls are provided: HDIO_GETGEO Returns the BIOS disk parameters in the following structure: struct hd_geometry { unsigned char heads; unsigned char sectors; unsigned short cylinders; unsigned long start; }; A pointer to this structure is passed as the ioctl(2) parameter. The information returned in the parameter is the disk geometry of the drive as understood by DOS! This geometry is not the physical geometry of the drive. It is used when constructing the drive's partition table, however, and is needed for convenient operation of fdisk(1), efdisk(1), and lilo(1). If the geometry information is not available, zero will be returned for all of the parameters. BLKGETSIZE Returns the device size in sectors. The ioctl(2) parameter should be a pointer to a long. BLKRRPART Forces a reread of the SCSI disk partition tables. No parameter is needed. The scsi(4) ioctl(2) operations are also supported. If the ioctl(2) parameter is required, and it is NULL, then ioctl(2) will fail with the error EINVAL. FILES
/dev/sd[a-h]: the whole device /dev/sd[a-h][0-8]: individual block partitions COLOPHON
This page is part of release 3.27 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/. Linux 1992-12-17 SD(4)
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