Linux扩展盘

Question

disks on vmware (/dev/sda) was extended (it is RHEL5, can't use lvm) from 20G to 40G .. if I use fdisk /dev/sda I can create /dev/sda7, but this partition have just 2G, why the partition have just 2G and how I fix it ? thanks

I tried:

fdisk /dev/sda and create /dev/sda7

    df -Th
...

/dev/sda2     ext3    6.8G  6.0G  478M  93% /
/dev/sda7     ext3    2.0G   36M  1.9G   2% /home

fdisk -l

Disk /dev/sda: 42.9 GB, 42949672960 bytes
255 heads, 63 sectors/track, 5221 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1         131     1052226   83  Linux
/dev/sda2             132        1045     7341705   83  Linux
/dev/sda3            1046        1567     4192965   82  Linux swap / Solaris
/dev/sda4            1568        2610     8377897+   5  Extended
/dev/sda5            1568        2089     4192933+  83  Linux
/dev/sda6            2090        2350     2096451   83  Linux

/dev/sda7            2351        2610     2088418+  83  Linux

used also parted:

Number  Start   End     Size    Type      File system  Flags
 1      32.3kB  1078MB  1077MB  primary   ext3         boot
 2      1078MB  8595MB  7518MB  primary   ext3
 3      8595MB  12.9GB  4294MB  primary   linux-swap
 4      12.9GB  21.5GB  8579MB  extended
 5      12.9GB  17.2GB  4294MB  logical   ext3
 6      17.2GB  19.3GB  2147MB  logical   ext3
        19.3GB  21.5GB  2139MB            Free Space
        21.5GB  42.9GB  21.5GB            Free Space

Warning: You requested a partition from 21.5GB to 42.9GB.
The closest location we can manage is 21.5GB to 21.5GB.  Is this still acceptable to you?
Yes/No? no
(parted) mkpart
Partition type?  [logical]?
File system type?  [ext2]? ext3
Start? 22G
End? 40G
Warning: You requested a partition from 22.0GB to 40.0GB.
The closest location we can manage is 21.5GB to 21.5GB.  Is this still acceptable to you?
Yes/No? no
(parted)

problem is I can't resize more than 2G

Answer 1

1. type:

   parted /dev/sd?

   (parted) print free
   Number Start End Size Type File system Flags
   32.3kB 1049kB 1016kB Free Space
   1 1049kB 1075MB 1074MB primary ext3
   2 1075MB 2149MB 1074MB primary ext3
   3 2149MB 3222MB 1074MB primary ext3
   4 3222MB 7443MB 4221MB extended
   5 3223MB 4297MB 1074MB logical ext3
   6 4298MB 5372MB 1074MB logical ext3
   7 5373MB 5897MB 524MB logical ext3
   5897MB 7443MB 1546MB Free Space
   7443MB 8590MB 1147MB Free Space

   (parted) resizepart 4
   End? [7443MB]? 8590MB

   (parted) print free
   Number Start End Size Type File system Flags
   32.3kB 1049kB 1016kB Free Space
   1 1049kB 1075MB 1074MB primary ext3
   2 1075MB 2149MB 1074MB primary ext3
   3 2149MB 3222MB 1074MB primary ext3
   4 3222MB 8590MB 5368MB extended
   5 3223MB 4297MB 1074MB logical ext3
   6 4298MB 5372MB 1074MB logical ext3
   7 5373MB 5897MB 524MB logical ext3
   5897MB 8590MB 2693MB Free Space

   (parted) quit

now I resized extended partition