09-30-2002
DG/UX : disk names ?!
hi there,
i normaly worked with linux, but at the moment i have to setup an dg/ux maschine ( intel based ).
ok, now i want to wirte a simple backup script :-)
i will use dd to copy scsi disk 1 to disk 2 :-)
under linux i would write something liek this :
dd if=/dev/sda of=/dev/sdb
or equal. but i don't understand the diskname system of the dg/ux system. i looked in /dev/dsk but i wondering about the devices there ....
in sysadm i have registert and formatet the destination disk. here some parameters :
source scsi disk = sd(apsc(pci(0),9,0,7),0,0)
destination dsik = sd(apsc(pci(0),9,0,7),4,0)
ok, if i start sysadm -> Device -> Disk -> Physical -> Copy and follow the instructors the system will successfull copy.
but this way needs to be connected and start it manual at the prompt.
can some one help / or tell me the disk names ?
have a nice day
Patrick k.
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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 */
CONFIG
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 re-read of the SCSI disk partition tables. No parameter is needed.
The scsi(4) ioctls are also supported. If the ioctl(2) parameter is required, and it is NULL, then ioctl() will return -EINVAL.
FILES
/dev/sd[a-h]: the whole device
/dev/sd[a-h][0-8]: individual block partitions
SEE ALSO
scsi(4)
1992-12-17 SD(4)