「無効なブロック数」のため、ext4パーティションの作成に失敗する

環境： - VMWare ESX 4.0の仮想マシン - OS：最新のRHEL 5.8

新しい（仮想）ディスクを追加した後、このディスクのLVMにext4パーティションを作成したいと思います。

これまでに行った措置：

$ sudo /sbin/fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that, of course, the previous
content won't be recoverable.


The number of cylinders for this disk is set to 10443.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
   (e.g., DOS FDISK, OS/2 FDISK)
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)

Command (m for help): n
p
Partition number (1-4): 1
First cylinder (1-10443, default 1):
Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-10443, default 10443):
Using default value 10443

Command (m for help): t
Selected partition 1
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.
$ sudo /usr/sbin/pvcreate /dev/sdb1
  Writing physical volume data to disk "/dev/sdb1"
  Physical volume "/dev/sdb1" successfully created
$ sudo /usr/sbin/vgcreate VGora /dev/sdb1
  /dev/hdc: open failed: No medium found
  Volume group "VGora" successfully created
$ sudo /usr/sbin/lvcreate -l "100%FREE" -n oradata VGora
  Logical volume "oradata" created

ext4パーティションの作成に失敗しました：

$ sudo /sbin/mke2fs -t ext4 /dev/VGora/oradata
mke2fs 1.39 (29-May-2006)
mke2fs: invalid blocks count - /dev/VGora/oradata

作成されたパーティションに関する追加情報：

$ sudo /usr/sbin/vgdisplay VGora
  --- Volume group ---
  VG Name               VGora
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  2
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                1
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               80.00 GB
  PE Size               4.00 MB
  Total PE              20479
  Alloc PE / Size       20479 / 80.00 GB
  Free  PE / Size       0 / 0
  VG UUID               ggjERV-sGbG-1nCv-HW61-LJk4-I7cX-Z3Infh

$ sudo /usr/sbin/lvdisplay VGora
  --- Logical volume ---
  LV Name                /dev/VGora/oradata
  VG Name                VGora
  LV UUID                nia1PK-7JJ2-jg5T-uN4X-ggYH-R0mS-oqCooY
  LV Write Access        read/write
  LV Status              available
  # open                 0
  LV Size                80.00 GB
  Current LE             20479
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:4

$ sudo /sbin/fdisk -l /dev/sdb

Disk /dev/sdb: 85.8 GB, 85899345920 bytes
255 heads, 63 sectors/track, 10443 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1               1       10443    83883366   8e  Linux LVM

このエラーに関する関連情報が見つからず、解決策もわかりません。

• ブロック数はどのように確認できますか？
• ext4に有効な数字でどのように修正しますか？