diskconf(1M) —

NAME

diskconf − get or set disk driver parameters

SYNOPSIS

diskconf [ −g ] [ −s code ] dev

DESCRIPTION

diskconf reports on the configuration parameters of the device dev. When no options are used, these parameters are reported in a human readable format. However, when −g is specified, a coded string is produced instead. This string may then be used in subsequent invocations as the argument to the −s option, where it is used to update the disk driver’s parameters. No sanity checking is performed in this case, although the disk driver itself may do some value checking.

The coded string is formatted as:

heads:cyls:sectors:secsize:secovhd:rsrvdcyls:intlv:skew:pheads:pcyls:psecs:flags

The definitions of the configuration parameters are:

heads The number of tracks per cylinder.

cyls The total number of cylinders.

sectors
The number of sectors per track.

secsize
The number of bytes per sector of user data.

secovhd
The number of bytes used for sector headers. These are normally unavailable to the user.

rsrvdcyls
The number of cylinders reserved by the disk controller for its own purposes. Normally these cylinders are not a part of the disk that is available for user data.

intlv The interleave factor with which the disk was formatted. If unknown by the driver, 0.

skew The skew factor between successive tracks within a cylinder with which the disk was formatted. If the interleave is not 1, this value is irrelevant; if its true value is unknown by the driver, 0 is reported.

pheads
The physical number of heads on the device; this is different from heads if the device operates with a virtual geometry. See disk(7) for more information.

pcyls The physical number of cylinders in the disk.

psecs The physical number of sectors in a track.

flags A 4-digit hexadecimal number followed by at most 4 characters: C, H, T, or S. These indicate that the driver can be programmed to change its notion of the number of cylinders, heads, sectors per track, and sector size, respectively.

DIAGNOSTICS

A nonzero return code is the errno value returned from the system call that caused the failure, and an appropriate message is written to stderr. Usually failure results from an invalid or nonexistant dev or from the V_CONFIG ioctl call that failed.

ADDED VALUE

This entry, supplied by INTERACTIVE Systems Corporation, is an extension of UNIX System V.