[K12OSN] Installing a 1TB Drive on Centos 5

"Terrell Prudé Jr." microman at cmosnetworks.com
Fri Apr 24 02:14:29 UTC 2009

Carl Keil wrote:
>>   Carl Keil wrote:
>>> Hey People,
>>> Is there anything special I need to do to install and format a 1TB 
>>> drive?  I installed a 500Gig drive on an older Fedora installation a 
>>> while ago and it wouldn't see the whole drive until I increased the 
>>> block size, I'm hoping I don't have to do that on this server.  Is a 
>>> 1TB drive basically plug and play on 32 bit Centos 5.
>>> Also, how would you fdisk and format it?  Would you do anything 
>>> special filesystem-wise?  I'm pretty new to >300 Gig drives.
>>> Thanks so much,
>>> ck
>> Shouldn't be anything special necessary.  I routinely do 1TB and 2TB 
>> partitions on RAID arrays with CentOS and RHEL.  Your 1TB drive 
>> should be plug 'n' chug.
>> Now, as to how to partition it, well, that depends on how you're 
>> going to use this drive on this system.  Can you give us any details 
>> on that so we can best advise you?
>> --TP
> Well, I didn't want to get into specifics because this isn't exactly 
> educational.  I'm going to be using this drive as storage for MythTV 
> recordings.  So, mostly huge files bigger than 5Gigs each.
> BTW - Here's what I'm talking about.  This doesn't look right to me.  
> First I fdisk I typed n for new partition, I selected primary, I 
> numbered it 1, then I took the defaults for first and end block.  Then 
> I hit "w" to write it to the partition table.  Then I did the 
> following.  That looks like an awfully small partition to me.  What 
> did I do wrong?
> Thanks,
> [root at kitkat ~]# mkfs.ext3 /dev/sdb1
> mke2fs 1.39 (29-May-2006)
> Filesystem label=
> OS type: Linux
> Block size=4096 (log=2)
> Fragment size=4096 (log=2)
> 122109952 inodes, 244190000 blocks
> 12209500 blocks (5.00%) reserved for the super user
> First data block=0
> Maximum filesystem blocks=0
> 7453 block groups
> 32768 blocks per group, 32768 fragments per group
> 16384 inodes per group
> Superblock backups stored on blocks:
>        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 
> 2654208,
>        4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 
> 78675968,
>        102400000, 214990848
> Writing inode tables: done                           Creating journal 
> (32768 blocks): done
> Writing superblocks and filesystem accounting information: done
> This filesystem will be automatically checked every 20 mounts or
> 180 days, whichever comes first.  Use tune2fs -c or -i to override.
> [root at kitkat ~]# df /dev/sdb1
> Filesystem           1K-blocks      Used Available Use% Mounted on
> -                       513468       124    513344   1% /dev

Ah, that's becaues you're looking at the (unmounted) device node 
directly with df.  Don't do that.  Instead, mount it somewhere (e. g. 
/mnt/sdb1) and then run df against that mount point.  Something like 

su - root
mkdir /MythTVShows
mount -t ext3 /dev/sdb1 /MythTVShows
df /MythTVShows

Note that on all of my GNU/Linux boxes, once you mount the partition 
somewhere, then you can also run df against the device node itself 
(/dev/sdb1, in this case) and get correct numbers.

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