Does vmstat -d give a count of actual physical writes/reads done to/from hard disk? Post: 302314883

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

vmstat -P (physical memory)

vmstat -P commands gives me an output as shown at the end of this message. my first question is about the difference between "total physical memory" and "total physical memory use" "Total Physical Memory" -"Total Physical Memory Use" 524288 pages-524026 pages= 262 pages does it mean...

2. Shell Programming and Scripting

sh script that reads/writes based upon contents of a file

Hi everyone, Ive got a quick question about the feasibility and any suggestions for a shell script. I can use sh or ksh, doesnt matter. Basically, Ive got an output file from a db2 command that looks like so: SCHEMA NAME CARD LEAF ELEAF LVLS ISIZE NDEL KEYS F4 F5 ...

3. HP-UX

determine the physical size of the hard disk

Hi is there a cmd in hpux 11 to determine the physical size of the hard disk. not bdf command. i have searched the other threads here but cant find an answer. thank you guys

4. Shell Programming and Scripting

identify the unix processes performing high disk i/o reads and writes

I would like to write shell/perl script which identifies the top unix processes that are performing high disk I/O's or/and writes If any one knows the solution please help me? -Swamy

5. UNIX for Advanced & Expert Users

identify the unix process performing high disk i/o reads and writes

Guys, Is there any UNIX command that captures the 'Unix process which is performing high disk I/O reads and writes'. can you help me in this? -Swamy

6. Filesystems, Disks and Memory

Life span of HDD - maximum reads/writes etc

Hi All I was wondering how the copying of vast amounts of data affected the overall lifespan of an HDD. In my example, I'm copying approx 120GB (250,000) of files, once per hour from disk to another. Is this likely to have a detrimental effect on the disk in terms of reads/writes etc? ...

7. Shell Programming and Scripting

Give actual pid as argument

Hi, I run a command in the shell that run another process. I need a way to provide the command's pid to the subprocess. For instance, if I run the command foo: foo process_to_run -p foo's_pid I would like to pass to process_to_run the pid of the foo command, or something that link...

8. Linux

C++ Code to Access Linux Hard Disk Sectors (with a LoopBack Virtual Hard Disk)

Hi all, I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it...

9. UNIX for Dummies Questions & Answers

Difference between buffered disk reads and cached reads?

I was analyzing the Disk read using hdparm utility. This is what i got as a result. # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 108 MB in 3.04 seconds = 35.51 MB/sec # hdparm -T /dev/sda /dev/sda: Timing cached reads: 3496 MB in 1.99 seconds = 1756.56 MB/sec...

10. Shell Programming and Scripting

Help with script that reads and writes java console Minecraft

Hi I am looking for an easy way to lock game mode (0) for everyone included op on a Minecraft server. It can be a script that every time a player changes game to 1 the script changes back to 0. What the player writes is visible in the java console. I am not good at script programming and my...

LEARN ABOUT OSF1

disktab

disktab(4)						     Kernel Interfaces Manual							disktab(4)

NAME

       disktab - Disk description file

SYNOPSIS

       #include <sys/disklabel.h>

DESCRIPTION

       The  disktab  database  describes disk geometries and disk partition characteristics.  It is used to initialize the disk label on the disk.
       The format is patterned after the termcap terminal database.  Entries in a disktab file consist of a number of : (colon) separated  fields.
       The  first entry for each disk gives the names which are known for the disk, separated by | (vertical bar) characters.  The last name given
       should be a long name fully identifying the disk.

       The following list indicates the normal values stored for each disk entry: Type Description str	Type of disk (for example, removable, win-
       chester)  str  Type of controller (for example, SMD, ESDI,      floppy) num  Number of sectors per track num  Number of tracks per cylinder
       num  Total number of cylinders on the disk num  Number of sectors per cylinder, nc*nt  default  num  Number  of	sectors  per  unit,  sc*nc
       default	num  Sector size in bytes, DEV_BSIZE default bool Controller supports bad144-style bad sector	   forwarding num  Rotation speed,
       rpm, default 3600 num  Sector skew per track, default 0 num  Sector skew per cylinder, default 0  num  Headswitch  time,  usec,	default  0
       num  One-cylinder  seek	time, usec, default 0 num  Sector interleave (n:1), default 1 num  Drive-type-dependent parameters num	Boot block
       size, default BBSIZE num  Superblock size, default SBSIZE num  Block size for partition `a'  (bytes)  num  Block  size  for  partition  `d'
       (bytes)	num  Block  size  for  partition  `e'  (bytes) num  Block size for partition `f' (bytes) num  Block size for partition `g' (bytes)
       num  Block size for partition `h' (bytes) num  Fragment size for partition  `a'	(bytes)  num  Fragment	size  for  partition  `d'  (bytes)
       num  Fragment  size  for  partition  `e'  (bytes) num  Fragment size for partition `f' (bytes) num  Fragment size for partition `g' (bytes)
       num  Fragment size for partition `h' (bytes) num  Offset of partition `a' in sectors num  Offset of partition `b' in sectors num  Offset of
       partition  `c'  in  sectors num	Offset of partition `d' in sectors num	Offset of partition `e' in sectors num	Offset of partition `f' in
       sectors num  Offset of partition `g' in sectors num  Offset of partition `h' in sectors num  Size of partition `a' in sectors num  Size	of
       partition  `b' in sectors num  Size of partition `c' in sectors num  Size of partition `d' in sectors num  Size of partition `e' in sectors
       num  Size of partition `f' in sectors num  Size of partition `g' in sectors num	Size of partition `h' in sectors  str  Partition  type	of
       partition  `a' (4.2BSD file system,	swap, etc.)  str  Partition type of partition `b' str  Partition type of partition `c' str  Parti-
       tion type of partition `d' str  Partition type of partition `e' str  Partition type of partition `f' str  Partition type of  partition  `g'
       str  Partition type of partition `h'

EXAMPLES

       The following is an example disktab entry:

       rz25|RZ25|DEC RZ25 Winchester:
	       :ty=winchester:dt=SCSI:ns#62:nt#9:nc#1492:
	       :oa#0:pa#131072:ba#8192:fa#1024:
	       :ob#131072:pb#262144:bb#8192:fb#1024:
	       :oc#0:pc#832527:bc#8192:fc#1024:
	       :od#393216:pd#146437:bd#8192:fd#1024:
	       :oe#539656:pe#146437:be#8192:fe#1024:
	       :of#686096:pf#146437:bf#8192:ff#1024:
	       :og#393216:pg#439311:bg#8192:fg#1024:
	       :oh#0:ph#0:bh#8192:fh#1024:

FILES

       /etc/disktab

RELATED INFORMATION

       Functions: getdiskbyname(3)

       Files: disklabel(4)

       Commands: disklabel(8), newfs(8) delim off

																	disktab(4)