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.\" sd.4
.\" Copyright 1992 Rickard E. Faith (faith@cs.unc.edu)
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Japanese Version Copyright (c) 1996,1997 ISHIKAWA Mutsumi
.\"         all rights reserved.
.\" Translated 1997-02-06, ISHIKAWA Mutsumi <ishikawa@linux.or.jp>
.\" Updated 2005-11-19, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.\" WORD:       pointer         ¥Ý¥¤¥ó¥¿
.\" WORD:       structure       ¹½Â¤ÂÎ
.\" WORD:       geometry        ¥¸¥ª¥á¥È¥ê
.\" WORD:       sector          ¥»¥¯¥¿
.\" WORD:       implement       ¼ÂÁõ
.\" WORD:       raw device      ¥í¡¼¥Ç¥Ð¥¤¥¹
.\"
.TH SD 4 1992-12-17 "Linux" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O sd \- Driver for SCSI Disk Drives
sd \- SCSI ¥Ç¥£¥¹¥¯¥É¥é¥¤¥Ö¤Î¤¿¤á¤Î¥É¥é¥¤¥Ð
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.nf
.BR "#include <linux/hdreg.h>        " "/* for HDIO_GETGEO */"
.BR "#include <linux/fs.h>           " "/* for BLKGETSIZE and BLKRRPART */"
.fi
.\"O .SH CONFIGURATION
.SH ÀßÄê
.\"O The block device name has the following form:
.\"O .BI sd lp,
.\"O where
.\"O .I l
.\"O is a letter denoting the physical drive, and
.\"O .I p
.\"O is a number denoting the partition on that physical drive.
.\"O Often, the partition number,
.\"O .IR p ,
.\"O will be left off when the device corresponds to the whole drive.
¤³¤Î¥Ö¥í¥Ã¥¯¥Ç¥Ð¥¤¥¹ (block device) ¤Î̾Á°¤Ï¡¢¼¡¤Î¤è¤¦¤Ê·Á¼°¤ò¤È¤ë:
.BI sd lp,
¤³¤Î¤¦¤Á¡¢
.I l
¤ÏʪÍý¥É¥é¥¤¥Ö¤ò°ÕÌ£¤¹¤ëʸ»ú¤Ç¤¢¤ê¡¢
.I p
¤Ï¤½¤ÎʪÍý¥É¥é¥¤¥Ö¾å¤Î¥Ñ¡¼¥Æ¥£¥·¥ç¥ó (partition) ¤ò°ÕÌ£¤¹¤ë¿ô»ú¤Ç¤¢¤ë¡£
¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¥Ê¥ó¥Ð¡¼
.I p
¤¬¤Ê¤¤¾ì¹ç¤Ï¡¢¤½¤Î¥Ç¥Ð¥¤¥¹¥Õ¥¡¥¤¥ë¤Ï¥É¥é¥¤¥ÖÁ´ÂΤò¤µ¤¹¡£

.\"O SCSI disks have a major device number of 8, and a minor device number of
.\"O the form (16 *
.\"O .IR drive_number ") + " partition_number ,
.\"O where
.\"O .I drive_number
.\"O is the number of the physical drive in order of detection, and
.\"O .I partition_number
.\"O is as follows:
SCSI ¥Ç¥£¥¹¥¯¤Ï¥á¥¸¥ã¡¼¥Ê¥ó¥Ð¡¼ 8 ¤ò»ý¤Á¡¢¼¡¤Î¤è¤¦¤Ê·Á¼°¤Î¥Þ¥¤¥Ê¡¼¥Ê¥ó¥Ð¡¼
¤ò»ý¤Ä¡£(16 *
.IR drive_number ") + " partition_number ¡¢
¤³¤Î
.I drive_number
¤Ï¸¡½Ð¤µ¤ì¤¿ÊªÍý¥É¥é¥¤¥Ö¤ÎÈÖ¹æ¤Ç¤¢¤ê¡¢
.I partition_number
¤Ï¼¡¤Î¤è¤¦¤Ë¤Ê¤ë:
.sp
.\"O partition 0 is the whole drive
.\"O .br
.\"O partitions 1-4 are the DOS "primary" partitions
.\"O .br
.\"O partitions 5-8 are the DOS "extended" (or "logical") partitions
¥Ñ¡¼¥Æ¥£¥·¥ç¥ó 0 ¤Ï¥É¥é¥¤¥ÖÁ´ÂÎ
.br
¥Ñ¡¼¥Æ¥£¥·¥ç¥ó 1 ¡Á 4 ¤Ï DOS ¤Î "´ðËÜ (primary)" ¥Ñ¡¼¥Æ¥£¥·¥ç¥ó
.br
¥Ñ¡¼¥Æ¥£¥·¥ç¥ó 5 ¡Á 8 ¤Ï DOS ¤Î "³ÈÄ¥ (extended)" (¤Þ¤¿¤Ï¡¢"ÏÀÍý
(logical)") ¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¡£

.\"O For example,
.\"O .I /dev/sda
.\"O will have major 8, minor 0, and will refer to all of the first SCSI drive
.\"O in the system; and
.\"O .I /dev/sdb3
.\"O will have major 8, minor 19, and will refer to the third DOS "primary"
.\"O partition on the second SCSI drive in the system.
Î㤨¤Ð¡¢
.I /dev/sda
¤Ï¥á¥¸¥ã¡¼¥Ê¥ó¥Ð¡¼ 8 ¥Þ¥¤¥Ê¡¼¥Ê¥ó¥Ð¡¼ 0 ¤ò»ý¤Á¡¢¥·¥¹¥Æ¥à¤ÎºÇ½é¤Î SCSI
¥É¥é¥¤¥ÖÁ´ÂΤò»²¾È¤¹¤ë¡£¤½¤·¤Æ¡¢
.I /dev/sdb3
¤Ï¥á¥¸¥ã¡¼¥Ê¥ó¥Ð¡¼ 8 ¥Þ¥¤¥Ê¡¼¥Ê¥ó¥Ð¡¼ 19 ¤ò»ý¤Á¡¢¥·¥¹¥Æ¥à¤ÎÆó¤ÄÌܤÎ
SCSI ¥É¥é¥¤¥Ö¤Î»°ÈÖÌܤΠDOS "´ðËÜ" ¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¤ò»²¾È¤¹¤ë¡£

.\"O At this time, only block devices are provided.
.\"O Raw devices have not yet been implemented.
¸½ºß¤Ï¡¢¥Ö¥í¥Ã¥¯¥Ç¥Ð¥¤¥¹¤À¤±¤¬Ä󶡤µ¤ì¤Æ¤¤¤ë¡£¥í¡¼¡¦¥Ç¥Ð¥¤¥¹ (raw device)
¤Ï¤Þ¤À¼ÂÁõ¤µ¤ì¤Æ¤¤¤Ê¤¤¡£
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O The following
.\"O .IR ioctl s
.\"O are provided:
¼¡¤Î
.I ioctl
¤¬Ä󶡤µ¤ì¤Æ¤¤¤ë:
.TP
.B HDIO_GETGEO
.RS
.\"O Returns the BIOS disk parameters in the following structure:
¼¡¤Î¤è¤¦¤Ê¹½Â¤ÂΤòÍѤ¤¤Æ BIOS ¤Î¥Ç¥£¥¹¥¯¥Ñ¥é¥á¡¼¥¿¤òÊÖ¤¹:
.in +4n
.nf

struct hd_geometry {
    unsigned char  heads;
    unsigned char  sectors;
    unsigned short cylinders;
    unsigned long  start;
};
.fi
.in

.\"O A pointer to this structure is passed as the
.\"O .BR ioctl (2)
.\"O parameter.
¤³¤Î¹½Â¤ÂΤؤΥݥ¤¥ó¥¿¤¬
.BR ioctl (2)
¤Ø¤Î¥Ñ¥é¥á¡¼¥¿¤È¤·¤ÆÅϤµ¤ì¤ë¡£

.\"O The information returned in the parameter is the disk geometry of the drive
.\"O .I "as understood by DOS!"
.\"O This geometry is
.\"O .I not
.\"O the physical geometry of the drive.
.\"O It is used when constructing the
.\"O drive's partition table, however, and is needed for convenient operation
.\"O of
.\"O .BR fdisk (1),
.\"O .BR efdisk (1),
.\"O and
.\"O .BR lilo (1).
.\"O If the geometry information is not available, zero will be returned for all
.\"O of the parameters.
¤³¤Î¥Ñ¥é¥á¡¼¥¿¤ËÆþ¤ì¤é¤ì¤ÆÊÖ¤µ¤ì¤ë¾ðÊó¤Ï¡¢
.I "DOS ¤Ë¤è¤Ã¤ÆÍý²ò¤µ¤ì¤ë¤è¤¦¤Ê"
¥É¥é¥¤¥Ö¤Î¥¸¥ª¥á¥È¥ê¤Ç¤¢¤ë¡£
¤³¤Î¥¸¥ª¥á¥È¥ê¤Ï¡¢¥É¥é¥¤¥Ö¤ÎʪÍýŪ¤Ê¥¸¥ª¥á¥È¥ê
.I ¤Ç¤Ï¤Ê¤¤¡£
¤³¤Î¾ðÊó¤Ï¥É¥é¥¤¥Ö¤Î¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¥Æ¡¼¥Ö¥ë¤òºîÀ®¤¹¤ë»þ¤ËÍѤ¤¤é¤ì¤ë¡¢
¤Þ¤¿¡¢
.BR fdisk (1),
.BR efdisk (1),
.BR lilo (1)
¤ÎŬÀÚ¤ÊÁàºî¤ËɬÍפǤ¢¤ë¡£
¤â¤·¡¢¥¸¥ª¥á¥È¥ê¤Î¾ðÊó¤¬ÆÀ¤é¤ì¤Ê¤±¤ì¤Ð¡¢¤½¤ì¤¾¤ì¤ÎÃÍÁ´¤Æ¤Ë¥¼¥í¤¬Æþ¤ì
¤é¤ì¤ÆÊÖ¤µ¤ì¤ë¡£
.RE
.TP
.B BLKGETSIZE
.\"O Returns the device size in sectors.
.\"O The
.\"O .BR ioctl (2)
.\"O parameter should be a pointer to a
.\"O .IR long .
¥»¥¯¥¿¤Î¿ô¤Çɽ¤·¤¿¥Ç¥Ð¥¤¥¹¤Î¥µ¥¤¥º¤¬ÊÖ¤µ¤ì¤ë¡£
.BR ioctl (2)
¤Î¥Ñ¥é¥á¡¼¥¿¤Ï¡¢
.I long
¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
.TP
.B BLKRRPART
.\"O Forces a reread of the SCSI disk partition tables.
.\"O No parameter is needed.
¶¯À©Åª¤Ë¡¢SCSI ¥Ç¥£¥¹¥¯¤Î¥Ñ¡¼¥Æ¥£¥·¥ç¥ó¥Æ¡¼¥Ö¥ë¤ÎºÆÆɤ߹þ¤ß¤ò¹Ô¤¦¡£
¥Ñ¥é¥á¡¼¥¿¤ÏɬÍפʤ¤¡£

.\"O The
.\"O .BR scsi (4)
.\"O .BR ioctl (2)
.\"O operations are also supported.
.\"O If the
.\"O .BR ioctl (2)
.\"O parameter is required, and it is NULL, then
.\"O .BR ioctl (2)
.\"O will fail with the error
.\"O .BR EINVAL .
.BR scsi (4)
¤Î
.BR ioctl (2)
Áàºî¤âƱÍͤ˥µ¥Ý¡¼¥È¤µ¤ì¤ë¡£
.BR ioctl (2)
¤Î¥Ñ¥é¥á¡¼¥¿¤¬É¬Íפǡ¢¤½¤ì¤¬ NULL ¤Ê¤é¤Ð¡¢
.BR ioctl (2)
¤Ï¥¨¥é¡¼
.B EINVAL
¤Ç¼ºÇÔ¤¹¤ë¡£
.\"O .SH FILES
.SH ¥Õ¥¡¥¤¥ë
.\"O /dev/sd[a\-h]: the whole device
/dev/sd[a\-h]: ¥É¥é¥¤¥ÖÁ´ÂÎ
.br
.\"O /dev/sd[a\-h][0\-8]: individual block partitions
/dev/sd[a\-h][0\-8]: ¸Ä¡¹¤Î¥Ö¥í¥Ã¥¯¥Ñ¡¼¥Æ¥£¥·¥ç¥ó
.\"O .\".SH "SEE ALSO"
.\" .SH ´ØÏ¢¹àÌÜ
.\"O .\".BR scsi (4)
.\" .BR scsi (4)