虚拟机增加硬盘以及更改ORACLE DB_RECOVERY_FILE_DEST参数实验

今天在虚拟机里，发现剩余磁盘空间<10%，总共30G的磁盘，剩下不到2G，如果给ORACLE做一个RMAN全备的话就所剩无几了，于是想在虚拟机里增加一块硬盘，然后格式化，挂载到ORACLE的目录下，然后把ORACLE的 FLASH_RECOVERY_AREA 改过来，步骤如下，

增加硬盘的步骤很简单，先关闭虚拟机，点EDIT =>HARD DISK=>ADD=>CREATE NEW VIRTUAL DISK=>SCSI 等按部就班，搞定后启动vm.

1，[root@coop ~]# fdisk -l

Disk /dev/sda: 53.6 GB, 53687091200 bytes

255 heads, 63 sectors/track, 6527 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 104391 83 Linux

/dev/sda2 14 3916 31350847+ 8e Linux LVM

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Disk /dev/sdb doesn't contain a valid partition table

[root@coop ~]# 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 2610.

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):

Command (m for help): n

Command action

e extended

p primary partition (1-4)

p

Partition number (1-4): 1

First cylinder (1-2610, default 1):

Using default value 1

Last cylinder or +size or +sizeM or +sizeK (1-2610, default 2610):

Using default value 2610

Command (m for help):

Command (m for help): m

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition's system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

Command (m for help): t

Selected partition 1

Hex code (type L to list codes): l

0 Empty 1e Hidden W95 FAT1 80 Old Minix c1 DRDOS/sec (FAT-

1 FAT12 24 NEC DOS 81 Minix / old Lin c4 DRDOS/sec (FAT-

2 XENIX root 39 Plan 9 82 Linux swap c6 DRDOS/sec (FAT-

3 XENIX usr 3c PartitionMagic 83 Linux c7 Syrinx

4 FAT16 <32M 40 Venix 80286 84 OS/2 hidden C: da Non-FS data

5 Extended 41 PPC PReP Boot 85 Linux extended db CP/M / CTOS / .

6 FAT16 42 SFS 86 NTFS volume set de Dell Utility

7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set df BootIt

8 AIX 4e QNX4.x 2nd part 8e Linux LVM e1 DOS access

9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e3 DOS R/O

a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e4 SpeedStor

b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS eb BeOS fs

c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi ee EFI GPT

e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ef EFI (FAT-12/16/

f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD f0 Linux/PA-RISC b

10 OPUS 55 EZ-Drive a7 NeXTSTEP f1 SpeedStor

11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f4 SpeedStor

12 Compaq diagnost 5c Priam Edisk a9 NetBSD f2 DOS secondary

14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot fb VMware VMFS

16 Hidden FAT16 63 GNU HURD or Sys b7 BSDI fs fc VMware VMKCORE

17 Hidden HPFS/NTF 64 Novell Netware b8 BSDI swap fd Linux raid auto

18 AST SmartSleep 65 Novell Netware bb Boot Wizard hid fe LANstep

1b Hidden W95 FAT3 70 DiskSecure Mult be Solaris boot ff BBT

1c Hidden W95 FAT3 75 PC/IX bf Solaris

Hex code (type L to list codes): b

Changed system type of partition 1 to b (W95 FAT32)

Command (m for help): p

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdb1 1 2610 20964793+ b W95 FAT32

Command (m for help): p

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdb1 1 2610 20964793+ b W95 FAT32

Command (m for help): m

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition's system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

Command (m for help): t

Selected partition 1

Hex code (type L to list codes): l

0 Empty 1e Hidden W95 FAT1 80 Old Minix c1 DRDOS/sec (FAT-

1 FAT12 24 NEC DOS 81 Minix / old Lin c4 DRDOS/sec (FAT-

2 XENIX root 39 Plan 9 82 Linux swap c6 DRDOS/sec (FAT-

3 XENIX usr 3c PartitionMagic 83 Linux c7 Syrinx

4 FAT16 <32M 40 Venix 80286 84 OS/2 hidden C: da Non-FS data

5 Extended 41 PPC PReP Boot 85 Linux extended db CP/M / CTOS / .

6 FAT16 42 SFS 86 NTFS volume set de Dell Utility

7 HPFS/NTFS 4d QNX4.x 87 NTFS volume set df BootIt

8 AIX 4e QNX4.x 2nd part 8e Linux LVM e1 DOS access

9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e3 DOS R/O

a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e4 SpeedStor

b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS eb BeOS fs

c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi ee EFI GPT

e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ef EFI (FAT-12/16/

f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD f0 Linux/PA-RISC b

10 OPUS 55 EZ-Drive a7 NeXTSTEP f1 SpeedStor

11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f4 SpeedStor

12 Compaq diagnost 5c Priam Edisk a9 NetBSD f2 DOS secondary

14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot fb VMware VMFS

16 Hidden FAT16 63 GNU HURD or Sys b7 BSDI fs fc VMware VMKCORE

17 Hidden HPFS/NTF 64 Novell Netware b8 BSDI swap fd Linux raid auto

18 AST SmartSleep 65 Novell Netware bb Boot Wizard hid fe LANstep

1b Hidden W95 FAT3 70 DiskSecure Mult be Solaris boot ff BBT

1c Hidden W95 FAT3 75 PC/IX bf Solaris

Hex code (type L to list codes): 8e

Changed system type of partition 1 to 8e (Linux LVM)

Command (m for help): m

Command action

a toggle a bootable flag

b edit bsd disklabel

c toggle the dos compatibility flag

d delete a partition

l list known partition types

m print this menu

n add a new partition

o create a new empty DOS partition table

p print the partition table

q quit without saving changes

s create a new empty Sun disklabel

t change a partition's system id

u change display/entry units

v verify the partition table

w write table to disk and exit

x extra functionality (experts only)

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: If you have created or modified any DOS 6.x

partitions, please see the fdisk manual page for additional

information.

Syncing disks.

[root@coop ~]# fdisk -l

Disk /dev/sda: 53.6 GB, 53687091200 bytes

255 heads, 63 sectors/track, 6527 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 104391 83 Linux

/dev/sda2 14 3916 31350847+ 8e Linux LVM

Disk /dev/sdb: 21.4 GB, 21474836480 bytes

255 heads, 63 sectors/track, 2610 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

/dev/sdb1 1 2610 20964793+ 8e Linux LVM

[root@coop ~]# df -h

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

28G 22G 4.5G 83% /

/dev/sda1 99M 14M 81M 15% /boot

none 506M 0 506M 0% /dev/shm

[root@coop ~]# mkfs.ext3 /dev/sdb1

mke2fs 1.35 (28-Feb-2004)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

2621440 inodes, 5241198 blocks

262059 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=8388608

160 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

Writing inode tables: done

Creating journal (8192 blocks): done

Writing superblocks and filesystem accounting information: done

This filesystem will be automatically checked every 39 mounts or

180 days, whichever comes first. Use tune2fs -c or -i to override.

[root@coop ~]# mount /dev/sdb1 /u01/arch

[root@coop ~]# df -lh

Filesystem Size Used Avail Use% Mounted on

/dev/mapper/VolGroup00-LogVol00

28G 22G 4.5G 83% /

/dev/sda1 99M 14M 81M 15% /boot

none 506M 0 506M 0% /dev/shm

/dev/sdb1 20G 77M 19G 1% /u01/arch

还要更改文件夹权限

[root@coop ~]# chmod 777 /u01/arch

[root@coop ~]# chown -R oracle /u01/arch

2，更改ORACLE 参数

SQL> show parameter db_recover

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

db_recovery_file_dest string /home/oracle/oracle/product/10

.2.0/db_1/flash_recovery_area

db_recovery_file_dest_size big integer 2G

SQL> alter system set db_recovery_file_dest='/u01/arch/flash_recovery_area' scope=both;

System altered.

SQL> alter system set db_recovery_file_dest_size=10G;

System altered.

3.大功告成

SQL> show parameter db_recover

NAME TYPE VALUE

------------------------------------ ----------- ------------------------------

db_recovery_file_dest string /u01/arch/flash_recovery_area

db_recovery_file_dest_size big integer 10G