I would like to thank:
Dan Sweet
Logan Stout
Brooke King
David Evans
Unixboy
Kevin Buterbauh
The basic consensus is:
Due to different arithmetic (gigs vs. data) that I'm seeing the correct
about, but I'll work
on the one that says it's 16.5 and see if I can't get it to move up to 17.
>From Dan:
The 16.5 is more than likely all that is REALLY usable out of the
18.2. All disks 'lose' some space to format overhead. 16.6 to 17
is about right for an 18 gb drive.
>From Logan:
That is roughly the amount of space you should see. they always give the
size in millions of bytes, so, for instance, 18.2 gigs would equal
18200000000 which comes to 17356 megabytes. As for the rest of the space, I
would guess it is one of two things.
A: FS slack (as in, the writing of the file system uses some space)
B: the method of formatting left of a small unused portion.
Hope that helps
>From Brooke:
The issue arises and is more obvious with large disk sizes
because disks' sizes are measured in powers of ten while data's
size is measured in powers of two. While 18.2GB disk is 18.2
x 10**9 (billion) bytes, it is about 16 x 2**30 ("giga") bytes.
"Giga" means billion in SI and in disk measurements, but not in
data size where it means 2 to the 30th power. To make matters
more interesting, RAM and disk usage (such as file system
statistics) are measured like data. This is why you only see
about 16GB of space available.
>From David: (Which I didn't try or recommend unless you really understand
this!)
Use "newfs" on the drive and adjust the "minfree" value. But you should
understand the effects of changing minfree so be careful.
>From Unixboy:
chances are if format shows 16.5, then the drives are either labeled wrong
or
they are 16.5 drives.
>From Kevin:
The problem is that marketing folks like to stretch the truth. Almost
all vendors of disk drives use the term GB incorrectly. What they call an
18.2 GB drive is really an 18.2 billion byte drive (they multiply by 1,000
instead of 1,024 when doing their calculations).
However, even accounting for that difference, 16.5 GB seems a little
low. What does format say about the other drive? Hope this helps...
-----Original Message-----
Managers:
I have looked through the archives, and through SunSolve, and I know this
question has been addressed before, so I apologize ahead of time for not
finding the answer.
The machine is an E250 with Solaris 2.6 loaded. It has two 18.2 gig hard
drives and when I go to format the second hard drive using the format
command it only sees 16.5 gigs.
How can I make the E250 recognize the additional space?
Thank you
Sue Peterson, Programmer Analyst
Publishing Dept., POC-PUB
Freightliner Corporation
PO Box 3849
Portland, OR 97208-3849
SuePeterson@Freightliner.com
Phone: 503.745.8333
Fax: 503.745.6745
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