Disk space

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2 total messages Started by David Kelman Tue, 12 Jan 1993 00:47

#4964

Author: David Kelman
Date: Tue, 12 Jan 1993 00:47

12 lines
1082 bytes

	This will probably sound like a very naive question, but I am a novice
at Unix and the NeXT.  According to Workspace, I have 133 Meg free on my disk.
According to Inspector, the entire file system is taking up 222 Meg.  I have
a 406 Meg disk, formatted as per norm (512K blocks), and that is what is 
reported as it's size when I boot up the machine.  Where are the other 51 Meg?

David Kelman
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Re: Disk space

#4984

Author: Eric Noyau
Date: Tue, 12 Jan 1993 14:15

40 lines
2224 bytes

In article <1993Jan12.004744.10378@samba.oit.unc.edu>  
David.Kelman@launchpad.unc.edu (David Kelman) writes:
> 	This will probably sound like a very naive question, but I am a novice
> at Unix and the NeXT.  According to Workspace, I have 133 Meg free on my
> disk. According to Inspector, the entire file system is taking up 222 Meg.  
> I have a 406 Meg disk, formatted as per norm (512K blocks), and that is what 
> is reported as it's size when I boot up the machine.  Where are the other 51 
> Meg?
> 

Perhaps an explanation...

excerpt from "man tunefs" :
> [...]
> DESCRIPTION
>      Tunefs is designed to change the dynamic parameters of a
>      file system which affect the layout policies.  The parame-
>      ters which are to be changed are indicated by the flags
>      given below:
>      [...]
>      -m minfree
>           This value specifies the percentage of space held back
>           from normal users; the minimum free space threshold.
>           The default value used is 10%.  This value can be set
>           to zero, however up to a factor of three in throughput
>           will be lost over the performance obtained at a 10%
>           threshold.  Note that if the value is raised above the
>           current usage level, users will be unable to allocate
>           files until enough files have been deleted to get under
>           the higher threshold.
> [...]

default minfree = 10%. 10% of 400 meg = 40 meg lost...

Eric
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