kilobytes to megabytes to gigabytes

[khilari]

Hi people, well just wanted to clear so 1 megabyte=1024 kilobytes and 1 giga byte=1024 megabytes. There fore if i talk about lvol3 below it is 204800/1024=200 megabytes and if i calculate the whole space of the volume group right now then it is.
200 +
291.92 +
4600 +
2300 +
200 +
270 +
24 =
7885.92/1024 = 7.701 giga bytes space.
What about terabytes 1024 giga = 1 tera byte.

Kindly, confirm this calculation

# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 204800 89336 114568 44% /
/dev/vg00/lvol1 298928 32392 236640 12% /stand
/dev/vg00/lvol8 4710400 627984 4050872 13% /var
/dev/vg00/lvol7 2310144 1331168 971344 58% /usr
/dev/vg00/lvol4 204800 71832 132600 35% /tmp
/dev/vg00/lvol6 2736128 1873056 856352 69% /opt
/dev/vg00/lvol5 24576 2344 22064 10% /home

[Arunvijai_4]

Hi Khilari,

Here is the link provides you with good information,

http://www.t1shopper.com/tools/calculate/

-Arun

[Robert-Jan Goossens]

correct.

attached is a script bdfmegs, which will report bdf sizes in megabytes.

Best regards,
Robert-Jan

[A. Clay Stephenson]

The easy way to remember is that 2^10 = 1024. The standard SI prefixes kilo, mega, giga, and tera (10^3,10^6,10^9,10^12) have been "borrowed" for digital use and taking into account that 1000 (10^3) is approximately 1024 (2^10) the meanings
are:

KB = 2^10
MB = 2^20
GB = 2^30
TB = 2^40

[Bharat Katkar]

Approximate sizes are:

root: 200 MB
stand: 298MB
var: 4.7 GB
usr: 2.3 GB
tmp: 204 MB
opt: 2.7 GB
home: 24 MB

1 TB = 1024 GB = 1024*1024 MB

Hope that helps.
Regards,

[Geoff Wild]

When doing lvcreates/lvextends, use capital L:

lvextend -L 3072 /dev/vg00/lvol10

That's 3GB.

then fsadm ad capital M for megabytes:

fsadm -b 3072M /var/adm/crash

Rgds...Geoff

[Bill Hassell]

Here's a most recent version of bdfmegs. The units of measure are powers of 2 (one Kbyte = 1024 bytes)

[TwoProc]

This is exactly why, when laying out lv's - I always denote the size of the partitions that I'm after in the number of PE's that I want to use, instead of Mbytes. It's for those of us who are driven to avoid doing "mathy" things when and where possible.

[khilari]

well, adding to johns remark. I want to clear so 1 physical extent = 4 megabytes ????

[A. Clay Stephenson]

No, 1 PE = 1 PE. The size of a PE can range from 1MB to 256MB but must be a power of 2 multiple of 1MB.

Math is good for you. Those who like science and can do math go into physics, chemistry, (or engineering); those who like science but can't do math go into biology.

[Ralph Grothe]

To give this thread a kind of goofy touch I would like to draw your attention to the fact that the SI units for quantities of storage in the IT were "recently" changed from base 2 to base 10 multipliers.
So if you still want to refer to 2^10 Bytes you are demanded to talk of one kibi Byte.
Similarily 2^20 is one mebi byte, and 2^30 one gibi byte.
I am convinced they did this to please the marketing and sales people so that they now can sell you 1000000000 bytes as one GB instead of 1073741824 what you payed for ;-)

http://www.iec.ch/zone/si/si_bytes.htm

[Ralph Grothe]

Btw, even since long before the introduction of kibibyte the networking folks always have been measuring their bandwiths in Mbps where they really meant 10^6 octets per second.
This discovery was a very disturbing experience for me because it shattered my bandwith/througput guesstimations up to that point ;-)

[A. Clay Stephenson]

I don't think I agree with that. 1Mbps is 10^6 bits/sec.

[Ralph Grothe]

Sorry Clay,
a flaw I made because a bit is indeed an 8th of an octet.
I meant to have written that 1 Mbps is merely ca. 122 kB/s.
But I was referring to the base 10 vs. base 2 obfuscation anyway.