linux 磁碟 2T以上的分割槽parted

# parted /dev/mapper/rman

GNU Parted 2.1
Using /dev/mapper/rman
Welcome to GNU Parted! Type 'help' to view a list of commands.

(parted) mklabel gpt
(parted) print

Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/rman: 3299GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start  End  Size  File system  Name  Flags

(parted) mkpart primary 0 3298GB

Warning: The resulting partition is not properly aligned for best performance.

Ignore/Cancel? Ignore
(parted)                                                                  
(parted) print                                                            
Model: Linux device-mapper (multipath) (dm)
Disk /dev/mapper/rman: 3299GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt


Number  Start   End     Size    File system  Name     Flags
 1      17.4kB  3298GB  3298GB               primary


(parted) quit                                                             
Information: You may need to update /etc/fstab.

# fdisk -l

Disk /dev/mapper/rman: 3298.5 GB, 3298534883328 bytes
255 heads, 63 sectors/track, 401024 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 32768 bytes / 67108864 bytes
Disk identifier: 0x00000000


           Device Boot      Start         End      Blocks   Id  System
/dev/mapper/rmanp1               1      267350  2147483647+  ee  GPT

Disk /dev/mapper/rmanp1: 3298.0 GB, 3297999983104 bytes
255 heads, 63 sectors/track, 400958 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 32768 bytes / 67108864 bytes
Alignment offset: 15360 bytes
Disk identifier: 0x00000000

# mkfs.ext4 /dev/mapper/rmanp1
mke2fs 1.41.12 (17-May-2010)
/dev/mapper/rmanp1 alignment is offset by 15360 bytes.
This may result in very poor performance, (re)-partitioning suggested.


warning: 481 blocks unused.


Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=8 blocks, Stripe width=16384 blocks
201686976 inodes, 805175296 blocks
40258788 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
24572 block groups
32768 blocks per group, 32768 fragments per group
8208 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, 512000000, 550731776, 644972544


Writing inode tables: done                            
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: 
done


This filesystem will be automatically checked every 31 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.

# vi /etc/fstab 

/dev/mapper/rmanp1 /rmanbak                    ext4    defaults        1 2

# mkdir /rmanbak

# mount /rmanbak/

# df -h
Filesystem                       Size  Used Avail Use% Mounted on
/dev/sdy6                        124G   18G  100G  16% /
tmpfs                            126G  346M  126G   1% /dev/shm
/dev/sdy2                        485M   39M  421M   9% /boot
/dev/sdy1                        200M  260K  200M   1% /boot/efi
/dev/mapper/vg_u01-LogVol00_u01  197G  6.8G  181G   4% /u01
/dev/mapper/vg_u02-LogVol00_u02  197G  5.3G  182G   3% /u02
/dev/mapper/rmanp1               3.0T  200M  2.9T   1% /rmanbak
[root@jnkm1db1 mapper]# chown oracle:oinstall /rmanbak/
[root@jnkm1db1 mapper]# chmod 755 /rmanbak/