di(1) di(1)
17 Jan 2013
Name
di - disk information
Synopsis
di [-AacghHjklLmnPqRtZ] [-B block-size] [-d display-size] [-f format]
[-I include-fstyp-list] [-s sort-type] [-w block-width] [-W
inode-width] [-x exclude-fstyp-list] [-X debug-level] [-z zone-name]
[file [...]]
mi
Description
di Displays usage information on mounted filesystems. Block values
are reported in a human readable format. If the user or group has a
disk quota, the values reported are adjusted according the quotas that
apply to the user.
If file is specified, the usage information for the partition on which
file is located is printed.
Unless the -a flag is specified, the following mounted filesystems
will not normally be displayed: filesystems with total space <= 0;
loopback filesystems that are duplicates of other normally mounted
filesystems (filesystem type of [aq]lofs[aq], [aq]none[aq], or
[aq]nullfs[aq]); loopback filesystems that are part of a zone
(Solaris); filesystems for which the system's ignore flag is set;
filesystems that have a device name of [aq]tmpfs[aq], [aq]cgroup[aq]
or [aq]swap[aq]; filesystems that have a device name starting with
[aq]/System/[aq] or [aq]com.apple.TimeMachine.[aq] (both MacOS).
Filesystems that the user does not have permissions to access will not
be displayed at all.
mi Displays the mounted filesystem information.
Several options may be specified to control the output of di and mi:
-A Print all fields (used for debugging). Mount points and device
names are printed at full width.
-a (compatibility: --all)
Prints all mounted devices (normally, those with 0 total space
are not printed - e.g. /dev/proc, /dev/fd).
-B block-size (compatibility: --block-size, -b)
Change the base block size from 1024 (default) to the size
specified. block-size may be one of: k - 1024 bytes, si - 1000
bytes, or a specific size.
-c (alias: --csv-output)
Comma separated values are output. The titles are output as the
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format string specifiers. Totals are turned off. See also the -n
flag.
-C (alias: --csv-tabs)
Values are output with tab separators. See also the -c option.
-d display-size (alias: --display-size)
Display the usage in units specified by display-size. Note that
if the base block size is SI units of 1000 bytes, the display
size is calculated using those units. display-size may be one
of: 512 - POSIX, k - kilobytes, m - megabytes, g - gigabytes,
t - terabytes, p - petabytes, e - exabytes, z - zettabytes,
y - yottabytes, h - Scaled alternative 1, H - Scaled alternative
2, or a specific value to use as the block size.
Block display sizes greater than 1024 bytes are displayed with a
precision of one decimal place after the radix.
The Scaled alternatives scale the sizes displayed and appends a
suffix (e.g. 48.0k, 3.4M).
With scaled alternative 1, sizes within a line may scale to
different units.
Scaled alternative 2 scales all the sizes in each individual line
to the same unit size (the largest needed).
-f format Use the specified format string format. See the Format
Strings section.
-g (alias for: -dg)
Display sizes in gigabytes.
-h (alias for: -dh)
Display partition sizes in scaled alternative 1 format.
--help
Display some basic usage information.
-H (alias for: -dH; compatibility: --human-readable)
Display partition sizes in scaled alternative 2 format.
-I include-fstype-list (compatibility: -F, --type)
Include only the file system types listed in include-fstyp-list.
The list is a comma separated list of file system types.
Multiple -I options may be specified. If the [aq]fuse[aq]
filesystem type is specified, all fuse* filesystems will be
included.
e.g. -I nfs,tmpfs or -I nfs -I tmpfs.
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--inodes
Ignored. Use the -f option.
-j (alias: --json-output)
The data is output as an array of json objects. Totals are
turned off. Use of format specifiers that specify the same field
will result in duplicated field names. (e.g. p, 1, 2)
-k (alias for: -dk)
Display sizes in Kbytes.
-l (compatibility: --local)
Display only local file systems.
-L Turn off check for duplicate filesystems (loopback (lofs/none)
mounts).
-m (alias for: -dm)
Display sizes in megabytes.
-n Do not print a header line above the list of file systems.
Useful when parsing the output of di.
--no-sync
Ignored.
-P (compatibility: --portability)
Output format is POSIX standard. 512 byte block size is the
default. The -k option may be used.
--print-type
Ignored. Use the -f option.
-q Disable quota checks.
-R (alias: --dont-resolve-symlinks)
Do not resolve symlinks (for mount points that have a trailing
UUID).
-s sort-type
Use sort-type to sort the output. The output of di is normally
sorted by mount point. The following sort flags may be used to
change the sort order: m - by mount point (default); n - leave
unsorted (as it appears in the mount table); s - by device name;
T - by total space; f - by free space; a - by available space; t
- by filesystem type; r - reverse the sort order; This will apply
to all sort flags following this sort flag.
These sort options may be combined in any order. e.g.:
di -stsrm # by type, device name, reversed mount;
di -strsrm # by type, reversed device-name, mount.
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--si An alias for -dH -Bsi.
--sync
Ignored.
-t (compatibility: --total)
Print a totals line below the list of file systems. Pooled
filesystems (zfs, advfs) have only the main pool added to the
total. Pooled filesystems that do not have pool information
available (btrfs, apfs) will not total up correctly. It is up to
the user to exclude (using the -x option) read-only filesystems
(cdfs, iso9660), swap-based (memfs, mfs, tmpfs) filesystems and
user (fuse*) filesystems. Excluding the [aq]fuse[aq] filesystem
will exclude all fuse* filesystems.
-w block-width
Set the print width for block values. The default is eight.
-v Ignored.
--version
Display di's version and default format string.
-W inode-width
Set the print width for inode values. Default is seven.
-x exclude-fstype-list (compatibility: --exclude-type)
Exclude the file system types listed in exclude-fstyp-list. The
list is a comma separated list of file system types. Multiple -x
options may be specified. If the [aq]fuse[aq] filesystem type is
excluded, all fuse* filesystems will be excluded. e.g. -x
nfs,tmpfs or -x nfs -x tmpfs.
-X level
Set the program's debugging level to debug-level.
-z zone-name
Display the filesystems for the specified zone. The zone must be
visible to the user.
-Z (alias for: -z all)
Display the filesystems for all visible zones.
Format Strings
The output of di may be specified via a format string. This string
may be given either via the -f command line option or as part of the
DI_ARGS environment variable. The format string may specify the
following columns:
m Print the name of the mount point.
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M Print the name of the mount point, at full length. The mount
point is formatted to the maximum width necessary for the longest
mount point name.
s Print the file system name (device name or remote mount point).
S Print the file system name (device name or remote mount point),
at full length. The file system name is formatted to the maximum
width necessary for the longest file system name.
t Print the file system type.
T Print the file system type at full length. The file system type
is formatted to the maximum width necessary for the longest file
system type.
Total Available
b Print the total number of megabytes on the file system.
B Print the total number of megabytes on the file system available
for use by normal users.
In Use
u Print the number of megabytes in use on the file system (actual
number of megabytes used = total - free).
c Print the number of megabytes not available for use by normal
users (total - available). Note that this calculation does work
correctly the [aq]apfs[aq] filesystem.
Free
f Print the number of free (unused) megabytes on the file system.
v Print the number of megabytes available for use by normal users.
Percentage Used
p Print the percentage of megabytes not available for use by normal
users (number of megabytes not available for use / total disk
space).
1 Print the percentage of total megabytes in use (actual number of
megabytes used / total disk space).
2 Print the percentage of megabytes in use, BSD-style. Represents
the percentage of user-available space in use. Note that values
over 100% are possible (actual number of megabytes used / disk
space available to non-root users).
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Percentage Free
a Print the percentage of megabytes available for use by normal
users (number of megabytes available for use / total disk space).
3 Print the percentage of total megabytes free (actual number of
megabytes free / total disk space).
Inodes
i Print the total number of file slots (inodes) that can be created
on the file system.
U Print the number of file slots in use.
F Print the number of file slots available.
P Print the percentage of file slots in use.
Mount Information
I Print the time the filesystem was mounted. This column is not
supported on all systems.
O Print the filesystem mount options.
The default format string for di is smbuvpT.
The default format string for mi is MSTIO.
The format string may also contain any other character not listed
above. The character will be printed as is. e.g. di -f
[aq]mbuvp|iUFP[aq] will print the character [aq]|[aq] between the disk
usage and the file slot usage. The command sequence:
di -f [aq]mbuvp
miUFP[aq]
will print two lines of data for each filesystem.
Examples
Various df equivalent format strings for System V release 4 are:
/usr/bin/df -v di -P -f msbuf1
/usr/bin/df -k di -dk -f sbcvpm
/usr/ucb/df di -dk -f sbuv2m
GNU df:
df di -dk -f SbuvpM -w 10
df -T di -dk -f STbuvpM -w 10
AIX df:
df di -d 512 -f Sbf1UPM -w 10
df -I di -d 512 -f Sbuf1M
df -I -M di -d 512 -f SMbuf1 -w 10
HP-UX bdf:
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bdf di -d k -f Sbuv2M
bdf -i di -d k -f Sbuv2UFPM
If you like your numbers to add up/calculate the percentage correctly,
try one of the following format strings:
di -f SMbuf1T
di -f SMbcvpT
di -f SMBuv2T
Environment Variables
The DI_ARGS environment variable may be used to specify command line
arguments. e.g. If you always want gigabytes displayed, set DI_ARGS
equal to "-dg". Any command line arguments specified will override
the DI_ARGS environment variable.
The DI_LOCALE_DIR environment variable may be used to specify the
location of the di program's locale message files.
The GNU df POSIXLY_CORRECT, and DF_BLOCK_SIZE and the BSD BLOCKSIZE
environment variables are honored.
Note
For filesystems that do not report available space (e.g. System V
release 3), the number of available space is set to the free space.
WARNING
Do not replace your system's df command with this program. You will
in all likelihood break your installation procedures.
See Also
df(1), fstab(5), getmnt(2), getmntinfo(2), mnttab(4), mount(1M)
statfs(2), statvfs(2)
Bugs
Send bug reports to: brad.lanam.di @ gmail.com
Known Issues:
di will probably not process a zettabyte or yottabyte sized filesystem
properly due to overflow of a long long.
Website
https://diskinfo-di.sourceforge.io/
Author
This program is Copyright 1994-2024 by Brad Lanam.
Brad Lanam, Pleasant Hill, CA (brad.lanam.di @ gmail.com)
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