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Full Discussion: how to make repartition of disk
Operating Systems Solaris how to make repartition of disk Post 302242100 by admin@solaris on Wednesday 1st of October 2008 07:25:29 AM
Old 10-01-2008
Quote:
Originally Posted by smartgupta
hi I am working with sun solaris 9 and I have 40 GB hard disk and I want to recreate the partition.

1)how can I recreate the partition??
2) how can I take the back-up of my application so that I will not loose the data..
#sudo format

select your disk on which you have to make partition........

format> partition
print - check current status of your disk
modify - to create partition

Select partitioning base:
0. Current partition table (default)
1. All Free Hog
Choose base (enter number) [0]? 1

Part Tag Flag Cylinders Size Blocks
0 root wm 0 0 (0/0/0) 0
1 swap wu 0 0 (0/0/0) 0
2 backup wu 0 - 49149 60.00GB (49150/0/0) 125824000
3 unassigned wm 0 0 (0/0/0) 0
4 unassigned wm 0 0 (0/0/0) 0
5 unassigned wm 0 0 (0/0/0) 0
6 usr wm 0 0 (0/0/0) 0
7 unassigned wm 0 0 (0/0/0) 0

Do you wish to continue creating a new partition
table based on above table[yes]?
Free Hog partition[6]? 5
Enter size of partition '0' [0b, 0c, 0.00mb, 0.00gb]: 12gb
Enter size of partition '1' [0b, 0c, 0.00mb, 0.00gb]: 12gb
Enter size of partition '3' [0b, 0c, 0.00mb, 0.00gb]: 12gb
Enter size of partition '4' [0b, 0c, 0.00mb, 0.00gb]: 12gb
Enter size of partition '6' [0b, 0c, 0.00mb, 0.00gb]: 0gb
Enter size of partition '7' [0b, 0c, 0.00mb, 0.00gb]: 0gb

Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 9830 12.00GB (9831/0/0) 25167360
1 swap wu 9831 - 19661 12.00GB (9831/0/0) 25167360
2 backup wu 0 - 49149 60.00GB (49150/0/0) 125824000
3 unassigned wm 19662 - 29492 12.00GB (9831/0/0) 25167360
4 unassigned wm 29493 - 39323 12.00GB (9831/0/0) 25167360
5 unassigned wm 39324 - 49149 11.99GB (9826/0/0) 25154560
6 usr wm 0 0 (0/0/0) 0
7 unassigned wm 0 0 (0/0/0) 0

Okay to make this the current partition table[yes]? yes
Enter table name (remember quotes): new

Ready to label disk, continue? yes

After this we can create the file systems on each slice:

newfs /dev/rdsk/c0t0d0s and so on....

At this point we must create the mount points:

mkdir -p /mount/data (note -p makes the parent directories if they don't exist since




Now change ownership to oracle user for all file systems so oracle database can write to them:

sudo chown oracle:dba /mount/data



Finally, we're ready to edit the vfstab with the new entries:

/dev/dsk/c0t0d0s0 /dev/rdsk/c0t0d0s0 / ufs 2
no -


Now we can mount up the file systems:

sudo mount /mount/data
 

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LEARN ABOUT ULTRIX

disktab

disktab(5)							File Formats Manual							disktab(5)

Name
       disktab - disk description file

Syntax
       #include <disktab.h>

Description
       The file is a simple data base that describes disk geometries and disk partition characteristics.  The format is patterned after the termi-
       nal data base.  Entries in consist of a number of fields separated by colons (:).  The first entry for each disk gives the names  that  are
       known for the disk, separated by vertical bars (|).  The last name given should be a long name fully identifying the disk.

       The following list indicates the normal values stored for each disk entry:
       Name Type Description
       ns   num  Number of sectors per track
       nt   num  Number of tracks per cylinder
       nc   num  Total number of cylinders on the disk
       ba   num  Block size for partition `a' (bytes)
       bd   num  Block size for partition `d' (bytes)
       be   num  Block size for partition `e' (bytes)
       bf   num  Block size for partition `f' (bytes)
       bg   num  Block size for partition `g' (bytes)
       bh   num  Block size for partition `h' (bytes)
       fa   num  Fragment size for partition `a' (bytes)
       fd   num  Fragment size for partition `d' (bytes)
       fe   num  Fragment size for partition `e' (bytes)
       ff   num  Fragment size for partition `f' (bytes)
       fg   num  Fragment size for partition `g' (bytes)
       fh   num  Fragment size for partition `h' (bytes)
       pa   num  Size of partition `a' in sectors
       pb   num  Size of partition `b' in sectors
       pc   num  Size of partition `c' in sectors
       pd   num  Size of partition `d' in sectors
       pe   num  Size of partition `e' in sectors
       pf   num  Size of partition `f' in sectors
       pg   num  Size of partition `g' in sectors
       ph   num  Size of partition `h' in sectors
       se   num  Sector size in bytes
       ty   str  Type of disk (e.g. removable, winchester)

       The entries can be automatically generated with the program.

Files
See Also
       chpt(8), newfs(8)

																	disktab(5)
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