FSCONFIG(8) FSCONFIG(8)
NAME
fsconfig - configuring a file server
SYNOPSIS
service name
config device
filsys name device
ream name
recover name
ip ipaddr
ipgw ipaddr
ipmask ipaddr
ipauth ipaddr
end
DESCRIPTION
When a file server's configuration has not been set, or by
explicit request early in the server's initialization (see
fs(8)), the server enters `config mode'. The commands
described here apply only in that mode. They establish con-
figuration constants that are typically valid for the life
of the server, and therefore need be run only once. If the
non-volatile RAM on the server gets erased, it will be nec-
essary to recreate the configuration.
In these commands, ipaddr is an IP address in the form
111.103.94.19 and name is a text string without white space.
The syntax of a device is more complicated:
wn1.n2.n3
A SCSI disk on target id n2, unit n1, and partition n3.
A single number specifies a unit, while two numbers
specify unit.partition, with the missing numbers
defaulting to zero. Any one of the numbers may be
replaced by <m-n> to represent the values m through n
inclusive. For example, (w<1-4>) is the concatenation
of SCSI targets 1 through 4.
ln1.n2.n3
The same as w, but leaving a single block at the begin-
ning for a label.
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FSCONFIG(8) FSCONFIG(8)
(device...)
A pseudo-device formed from the concatenation of the
devices in the list. The devices are not blank- or
comma-separated.
[device...]
A pseudo-device formed from the block-wise interleaving
of the devices in the list. The size of the result is
the number of devices times the size of the smallest
device.
pdevice.n1.n2
A partition starting at n1% from the beginning of
device with a length n2% of the size of the device.
Parenthesize device if it contains periods.
j(device1 device2...)device3
Device1 is the SCSI juke box interface. The device2s
are the SCSI drives in the jukebox and device3 repre-
sents the demountable platters in the juke box.
fdevice
A pseudo-WORM disk: blocks on device can be written
only once and may not be read unless written.
cdevice1device2
A cached WORM. The first device is the cache, the sec-
ond the WORM.
o (Letter o) The read-only (dump) file system of the pre-
viously defined cached WORM file system.
The service command sets the textual name of the server as
known in the network databases.
The configuration information is stored in block zero on a
device whose device string is written in non-volatile RAM.
The config command identifies the device on which the infor-
mation is recorded.
The filsys command configures a file system on device and
calls it name. Name is used as the specifier in attach mes-
sages to connect to that file system. (The file system is
the one attached to if the specifier is null; see
attach(5)).
The ream command initializes the named file system. It
overwrites any previous file system on the same device and
creates an empty root directory on the device. If name is
main, the file server, until the next reboot, will accept
wstat messages (see stat(5)) that change the owner and group
of files, to enable initializing a fresh file system from a
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FSCONFIG(8) FSCONFIG(8)
mkfs(8) archive.
For the recover command, the named file system must be a
cached WORM. Recover clears the associated magnetic cache
and initializes the file system, effectively resetting its
contents to the last dump.
The rest of the commands record IP addresses: the file
server's address (ip), the local gateway's (ipgw), the local
authentication server's (ipauth), and the local subnet mask
(ipmask). Ipauth should be 0.0.0.0 if the system is doing
its own authentication rather than calling an external
authentication server.
The various configuration commands only record what to do;
they write no data to disk. The command end exits config
mode and begins running the file server proper. The server
will then perform whatever I/O is required to establish the
configuration.
EXAMPLE
Initialize a file server kgbsun with a single file system
interleaved between SCSI targets 3 and 4.
service kgbsun
config w3
filsys main [w<3-4>]
ream main
Initialize a file server kremvax with a single disk on tar-
get 0 partitioned as a cached pseudo-WORM file system with
the cache on the third quarter of the drive and the pseudo-
WORM on the interleave of the first, second, and fourth
quarters.
service kremvax
config p(w0)50.1
filsys main cp(w0)50.25f[p(w0)0.25p(w0)25.25p(w0)75.25]
filsys dump o
ream main
SOURCE
/sys/src/fs/port/config.c
SEE ALSO
Ken Thompson, ``The Plan 9 File Server''.
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