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File Formats format.dat(4)
NAME
format.dat - disk drive configuration for the format command
DESCRIPTION
format.dat enables you to use your specific disk drives with
format(1M). On Solaris 2.3 and compatible systems, format
will automatically configure and label SCSI drives, so that
they need not be defined in format.dat. Three things can be
defined in the data file:
o search paths
o disk types
o partition tables.
Syntax
The following syntax rules apply to the data file:
o The pound # sign is the comment character. Any text on
a line after a pound sign is not interpreted by format.
o Each definition in the format.dat file appears on a
single logical line. If the definition is more than one
line long, all but the last line of the definition must
end with a backslash (\).
o A definition consists of a series of assignments that
have an identifier on the left side and one or more
values on the right side. The assignment operator is
the equal sign (=). Assignments within a definition
must be separated by a colon (:).
o White space is ignored by format(1M). If you want an
assigned value to contain white space, enclose the
entire value in double quotes ("). This will cause the
white space within quotes to be preserved as part of
the assignment value.
o Some assignments can have multiple values on the right
hand side. Separate values by a comma (,).
Keywords
The data file contains disk definitions that are read in by
format(1M) when it starts up. Each definition starts with
one of the following keywords: search_path, disk_type, and
partition.
search_path 4.x: Tells format which disks it should
search for when it starts up. The list in
SunOS 5.10 Last change: 19 Apr 2001 1
File Formats format.dat(4)
the default data file contains all the disks
in the GENERIC configuration file. If your
system has disks that are not in the GENERIC
configuration file, add them to the
search_path definition in your data file.
The data file can contain only one
search_path definition. However, this sin-
gle definition lets you specify all the
disks you have in your system.
5.x: By default, format(1M) understands all
the logical devices that are of the form
/dev/rdsk/cntndnsn; hence search_path is not
normally defined on a 5.x system.
disk_type Defines the controller and disk model. Each
disk_type definition contains information
concerning the physical geometry of the
disk. The default data file contains defini-
tions for the controllers and disks that the
Solaris operating environment supports. You
need to add a new disk_type only if you have
an unsupported disk. You can add as many
disk_type definitions to the data file as
you want.
The following controller types are supported
by format(1M):
XY450 Xylogics 450 controller
(SMD)
XD7053 Xylogics 7053 controller
(SMD)
SCSI True SCSI (CCS or SCSI-2)
ISP-80 IPI panther controller
The keyword itself is assigned the name of
the disk type. This name appears in the
SunOS 5.10 Last change: 19 Apr 2001 2
File Formats format.dat(4)
disk's label and is used to identify the
disk type whenever format(1M) is run.
Enclose the name in double quotes to
preserve any white space in the name.
Below are lists of identifiers for supported
controllers. Note that an asterisk ('*')
indicates the identifier is mandatory for
that controller -- it is not part of the
keyword name.
The following identifiers are assigned
values in all disk_type definitions:
acyl* alternate cylinders
asect alternate sectors
per track
atrks alternate tracks
fmt_time formatting time per
cylinder
ncyl* number of logical
cylinders
nhead* number of logical
heads
nsect* number of logical
sectors per track
pcyl* number of physical
cylinders
SunOS 5.10 Last change: 19 Apr 2001 3
File Formats format.dat(4)
phead number of physical
heads
psect number of physical
sectors per track
rpm* drive RPM
These identifiers are for SCSI and MD-21
Controllers
read_retries page 1 byte 3 (read retries)
write_retries page 1 byte 8 (write
retries)
cyl_skew page 3 bytes 18-19 (cylinder
skew)
trk_skew page 3 bytes 16-17 (track
skew)
trks_zone page 3 bytes 2-3 (tracks per
zone)
cache page 38 byte 2 (cache param-
eter)
prefetch page 38 byte 3 (prefetch
parameter)
SunOS 5.10 Last change: 19 Apr 2001 4
File Formats format.dat(4)
max_prefetch page 38 byte 4 (minimum pre-
fetch)
min_prefetch page 38 byte 6 (maximum pre-
fetch)
Note: The Page 38 values are device-
specific. Refer the user to the particular
disk's manual for these values.
For SCSI disks, the following geometry
specifiers may cause a mode select on the
byte(s) indicated:
asect page 3 bytes 4-5 (alternate
sectors per zone)
atrks page 3 bytes 8-9 (alt.
tracks per logical unit)
phead page 4 byte 5 (number of
heads)
psect page 3 bytes 10-11 (sectors
per track)
And these identifiers are for SMD Controll-
ers Only
bps* bytes per sector (SMD)
bpt* bytes per track (SMD)
Note: under SunOS 5.x, bpt is only required
for SMD disks. Under SunOS 4.x, bpt was
required for all disk types, even though it
was only used for SMD disks.
SunOS 5.10 Last change: 19 Apr 2001 5
File Formats format.dat(4)
And this identifier is for XY450 SMD Con-
trollers Only
drive_type* drive type (SMD) (just call
this "xy450 drive type")
partition Defines a partition table for a specific
disk type. The partition table contains the
partitioning information, plus a name that
lets you refer to it in format(1M). The
default data file contains default partition
definitions for several kinds of disk
drives. Add a partition definition if you
repartitioned any of the disks on your sys-
tem. Add as many partition definitions to
the data file as you need.
Partition naming conventions differ in SunOS
4.x and in SunOS 5.x.
4.x: the partitions are named as a, b, c, d,
e, f, g, h.
5.x: the partitions are referred to by
numbers 0, 1, 2, 3, 4, 5, 6, 7.
EXAMPLES
Example 1: A sample disk_type and partition.
Following is a sample disk_type and partition definition in
format.dat file for SUN0535 disk device.
disk_type = "SUN0535" \
: ctlr = SCSI : fmt_time = 4 \
: ncyl = 1866 : acyl = 2 : pcyl = 2500 : nhead = 7 : nsect = 80 \
: rpm = 5400
partition = "SUN0535" \
: disk = "SUN0535" : ctlr = SCSI \
: 0 = 0, 64400 : 1 = 115, 103600 : 2 = 0, 1044960 : 6 = 300, 876960
FILES
/etc/format.dat default data file if format
-x is not specified, nor is
there a format.dat file in
the current directory.
SunOS 5.10 Last change: 19 Apr 2001 6
File Formats format.dat(4)
SEE ALSO
format(1M)
System Administration Guide: Basic Administration
SunOS 5.10 Last change: 19 Apr 2001 7
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This page was generated on Wed Sep 12 21:37:26 GMT 2007
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