Amount of disk space lost to formatting?

Ron Waddell rwaddell at weatherflow.com
Fri Apr 14 11:07:53 CDT 2006


Use tune2fs to lower the amount of reserved space. I believe the default is 
5%.

Ron Waddell
WeatherFlow Inc.

----- Original Message ----- 
From: "David Hubbard" <dhubbard at dino.hostasaurus.com>
To: <linux-poweredge at dell.com>
Sent: Friday, April 14, 2006 11:56 AM
Subject: RE: Amount of disk space lost to formatting?


> Oh, no there's files on there, but not that many.  Thre's 2744
> currently; mostly small.  But even if they all got unlucky and
> crossed into the next block and wasted most of it, that shouldn't
> make 4 GB. :-)
>
> David
>
>> -----Original Message-----
>> From: Eric Warnke [mailto:ericew at gmail.com]
>> Sent: Friday, April 14, 2006 11:49 AM
>> To: David Hubbard
>> Cc: linux-poweredge at dell.com
>> Subject: Re: Amount of disk space lost to formatting?
>>
>> 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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>>
>>
>
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