ioping(1) [debian man page]

IOPING(1)							   User Commands							 IOPING(1)

NAME

       ioping - simple disk I/O latency monitoring tool

SYNOPSYS

       ioping [-LCDRq] [-c count] [-w deadline] [-p period] [-i interval] [-s size] [-S wsize] [-o offset] device|file|directory

       ioping -h | -v

DESCRIPTION

       This tool lets you monitor I/O latency in real time.

OPTIONS

       -c count
	      Stop after count requests.

       -w deadline
	      Stop after deadline time passed.

       -p period
	      Print raw statistics for every period requests.

       -i interval
	      Set time between requests to interval (1s).

       -s size
	      Request size (4k).

       -S size
	      Working set size (1m).

       -o offset
	      Offset in input file.

       -L     Use sequential operations rather than random. This also sets request size to 256k (as in -s 256k).

       -C     Use cached I/O.

       -D     Use direct I/O.

       -R     Disk seek rate test (same as -q -i 0 -w 3 -S 64m).

       -q     Suppress human-readable output.

       -h     Display help message and exit.

       -v     Display version and exit.

   Argument suffixes
       For options that expect time argument (-i and -w), default is seconds, unless you specify one of the following suffixes (case-insensitive):

       us, usec
	      microseconds

       ms, msec
	      milliseconds

       s, sec seconds

       m, min minutes

       h, hour
	      hours

       For  options that expect "size" argument (-s, -S and -o), default is bytes, unless you specify one of the following suffixes (case-insensi-
       tive):

       s      disk sectors (a sector is always 512).

       k, kb  kilobytes

       p      memory pages (a page is always 4K).

       m, mb  megabytes

       g, gb  gigabytes

       t, tb  terabytes

       For options that expect "number" argument (-p and -c) you can optionally specify one of the following suffixes (case-insensitive):

       k      kilo (thousands, 1 000)

       m      mega (millions, 1 000 000)

       g      giga (billions, 1 000 000 000)

       t      tera (trillions, 1 000 000 000 000)

EXIT STATUS

       Returns 0 upon success. The following error codes are defined:

       1      Invalid usage (error in arguments).

       2      Error during preparation stage.

       3      Error during runtime.

EXAMPLES

       ioping .
	      Show disk I/O latency using the default values and the current directory, until interrupted.

       ioping -c 10 -s 1M /tmp
	      Measure latency on /tmp using 10 requests of 1 megabyte each.

       ioping -R /dev/sda
	      Measure disk seek rate.

       ioping -RL /dev/sda
	      Measure disk sequential speed.

SEE ALSO

       Homepage <http://code.google.com/p/ioping/>.

AUTHORS

       This program was written by Konstantin Khlebnikov <koct9i@gmail.com>.
       Man-page was written by Kir Kolyshkin <kir@openvz.org>.

								     July 2011								 IOPING(1)

CFDISK(8)							 GNU cfdisk Manual							 CFDISK(8)

NAME

       GNU cfdisk - a curses-based partition table manipulation program

SYNOPSIS

       cfdisk [options] [device]

DESCRIPTION

       cfdisk  is  a  disk  partition  manipulation program, which allows you to create, destroy, resize, move and copy partitions on a hard drive
       using a simple menu-driven interface. It is useful for organising the disk space on a new drive, reorganising an old drive, creating  space
       for  new operating systems, and copying data to new hard disks. For a list of the supported partition types, see the --list-partition-types
       option below.

OPTIONS

       -h, --help
	      displays a help message.

       -v, --version
	      displays the program's version.

       -a, --arrow-cursor
	      use an arrow cursor, instead of reverse video highlighting, in case your terminal doesn't support it.

       -z, --new-table
	      create a new partition table on the disk. This is useful if you want to change the partition table type or want to  repartition  you
	      entire drive. Note that this does not delete the old table on the disk until you commit the changes.

       -u, --units=UNIT
	      sets the default display units to UNIT. A list of possible units is given below.

       -t, --list-partition-types
	      displays a list of supported partition types and features.

UNITS

       You can choose in what unit cfdisk should display quantities like partition sizes. You can choose from sectors, percents, bytes, kilobytes,
       etc. Note that one kilobyte is equal to 1,000 bytes, as this is consistent with the SI prefixes and is used by hard disk manufacturers.	If
       you  prefer  to	see  the sizes in units with binary prefixes, you should instead select one kilo binary byte (kibibyte), which is equal to
       1,024 bytes. Whatever display unit you have chosen, you can always enter the quantities in the unit of your choice, for example 1000000B or
       1000kB.

       compact
	      display each size in the most suitable unit from B, kB, MB, GB and TB.

       B      one byte

       kB     one kilobyte (1,000 bytes)

       MB     one megabyte (1,000,000 bytes)

       GB     one gigabyte (1,000,000,000 bytes)

       TB     one terabyte (1,000,000,000,000 bytes)

       KiB    one kilo binary byte (1,024 bytes)

       MiB    one mega binary byte (1,048,576 bytes)

       GiB    one giga binary byte (1,073,741,824 bytes)

       TiB    one tera binary byte (1,099,511,627,776 bytes)

       s      one sector. It depends on the sector size of the disk. You can use it if you want to see or choose the exact size in sectors.

       %      one percent from the size of the disk

       cyl    one cylinder. It depends on the cylinder size.

       chs    use CHS display units.

BUGS

       There are no known bugs. We are in early stages for development, so be careful.

SEE ALSO

       fdisk(8), mkfs(8), parted(8) The cfdisk program is fully documented in the info(1) format GNU cfdisk User Manual manual.

fdisk								   16 June, 2006							 CFDISK(8)