Amount of disk space lost to formatting?

Eric Warnke ericew at gmail.com
Fri Apr 14 10:49:20 CDT 2006


73000000000 ( 73GB to the drive manufactireres ) =
73000000000/1024/1024/1024 = 67.9 GiB to the computer.  They are the same
ammount and no loss of space occured.

the 104Mb used is the default ext3 journal.

The 4GB is confising though. I have never seen anything like that.  ls -alR
/mountpoint does not reveal *any* files?

Cheers,
Eric

On 4/14/06, David Hubbard <dhubbard at dino.hostasaurus.com> wrote:
>
> I just threw two 73 GB drives in a PE2850 and mirrored
> them on the PERC.  Shows up to the OS as /dev/sdb since
> it's the second logical drive:
>
> SCSI device sdb: 143114240 512-byte hdwr sectors (73274 MB)
>
> After partitioning and formatting though, I seem to have lost
> more room than I had expected.  fdisk shows:
>
>
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1               1        8908    71553478+  83  Linux
>
>
> But df shows:
>
> Filesystem            Size  Used Avail Use% Mounted on
> /dev/sdb1              68G  104M   64G   1% /data
>
>
> 73 GB drives down to 68 GB formatted is bad enough, but there
> seems to be another 4 GB missing over what's in use?  I
> used the default inode counts:
>
> Filesystem            Inodes   IUsed   IFree IUse% Mounted on
> /dev/sdb1            8945664    1837 8943827    1% /data
>
> Is that much being tied up in the inodes?
>
> Thanks,
>
> Dave
>
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