使用udev擴充套件ASM磁碟組
環境：linux6.5 Oracle RAC叢集兩節點，Oracle版本11.2.0.4
1.1.1 檢視相關內容：
（1 ）磁碟情況：
[root@db1 ~]# fdisk -l
Disk /dev/sda: 85.9 GB, 85899345920 bytes 255 heads, 63 sectors/track, 10443 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000d2f26 Device Boot Start End Blocks Id System /dev/sda1 * 1 64 512000 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 64 10444 83373056 8e Linux LVM Disk /dev/sdb: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdd: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdc: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sde: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdf: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdg: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdh: 21.5 GB, 21474836480 bytes 255 heads, 63 sectors/track, 2610 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_db1-lv_root: 53.7 GB, 53687091200 bytes 255 heads, 63 sectors/track, 6527 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_db1-lv_swap: 8405 MB, 8405385216 bytes 255 heads, 63 sectors/track, 1021 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/vg_db1-lv_home: 23.3 GB, 23278387200 bytes 255 heads, 63 sectors/track, 2830 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000
（2 ）ASM 磁碟情況：
SQL> select GROUP_NUMBER,DISK_NUMBER,MOUNT_STATUS,STATE,TOTAL_MB,PATH,NAME from v$asm_disk order by GROUP_NUMBER,DISK_NUMBER;
GROUP_NUMBER DISK_NUMBER MOUNT_S STATE TOTAL_MB PATH NAME ------------ ----------- ------- -------- ---------- -------------------- -------------------- 1 0 CACHED NORMAL 51200 /dev/asmdiske DATA_0000 1 1 CACHED NORMAL 51200 /dev/asmdiskf DATA_0001 2 0 CACHED NORMAL 20480 /dev/asmdiskg ARCH_0000 3 0 CACHED NORMAL 1024 /dev/asmdiskb OCR_0000 3 1 CACHED NORMAL 1024 /dev/asmdiskc OCR_0001 3 2 CACHED NORMAL 1024 /dev/asmdiskd OCR_0002 6 rows selected.
結論：ASM 掛了6 塊磁碟，透過容量可能看到有一塊21.5G 的未掛載進來，也新盤還未使用，檢視21.5G 的磁碟，我們發現有 /dev/sdg 和 /dev/sdh 。
（3 ）ASM 磁碟對應物理盤：
[root@db1 rules.d]# pwd
/etc/udev/rules.d
[root@db1 rules.d]# more 99-x-asmdisk_new.rules
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29c5362298e7a9898225a9f8ed6", SYMLINK+="asmdiskb", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c2963776a39f75310d2f2bd98287", SYMLINK+="asmdiskc", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29dd4c14aa6a5e4f77f40427565", SYMLINK+="asmdiskd", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c292b56645878eb55e7811673ae2", SYMLINK+="asmdiske", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29ec780367d4c1f845c880f7f0e", SYMLINK+="asmdiskf", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c297777b8958d4d4dd5cd7ddbc47", SYMLINK+="asmdiskg", OWNER="grid", GROUP="asmadmin", MODE="0660"
[root@db1 rules.d]#
（4 ）確認下是哪塊磁碟未使用，檢視磁碟ID ，與上面99-x-asmdisk_new.rules 內容對比後發現：
[root@db1 rules.d]# /lib/udev/scsi_id -g -u /dev/sdg --- 該塊磁碟是新盤，未使用
36000c293ef0d560ff854306446331b79
[root@db1 rules.d]# /lib/udev/scsi_id -g -u /dev/sdh
36000c297777b8958d4d4dd5cd7ddbc47
1.1.2 將未使用磁碟進行掛載
目標：/dev/sdg 到ASM 磁碟組2 即ARCH 當中
（1 ）首先修改檔案99-x-asmdisk_new.rules ，修改完後如下內容：
[root@db1 rules.d]# more 99-x-asmdisk_new.rules
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29c5362298e7a9898225a9f8ed6", SYMLINK+="asmdiskb", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c2963776a39f75310d2f2bd98287", SYMLINK+="asmdiskc", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29dd4c14aa6a5e4f77f40427565", SYMLINK+="asmdiskd", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c292b56645878eb55e7811673ae2", SYMLINK+="asmdiske", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c29ec780367d4c1f845c880f7f0e", SYMLINK+="asmdiskf", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c297777b8958d4d4dd5cd7ddbc47", SYMLINK+="asmdiskg", OWNER="grid", GROUP="asmadmin", MODE="0660"
KERNEL=="sd?", ENV{ID_SERIAL}=="36000c293ef0d560ff854306446331b79", SYMLINK+="asmdiskh", OWNER="grid", GROUP="asmadmin", MODE="0660" ----增加新行
（2 ）重新載入udev 檔案內容並啟動
[root@db1 rules.d]# udevadm control --reload-rules
[root@db1 rules.d]# start_udev
Starting udev: [ OK ]
啟動完之後可看到新加的磁碟 /dev/asmdiskh -> sdg
[root@db1 rules.d]# ls -l /dev/asm
total 0
[root@db1 rules.d]# ls -l /dev/asm*
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskb -> sdf
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskc -> sde
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskd -> sdd
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiske -> sdb
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskf -> sdc
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskg -> sdh
lrwxrwxrwx 1 root root 3 May 19 15:13 /dev/asmdiskh -> sdg
（3 ）另一個節點做同樣的處理
[root@db2 rules.d]# vi 99-x-asmdisk_new.rules
[root@db2 rules.d]# udevadm control --reload-rules
[root@db2 rules.d]# start udev
start: Unknown job: udev
[root@db2 rules.d]# start_udev
Starting udev: [ OK ]
[root@db2 rules.d]# ls -l /dev/asm*
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskb -> sdf
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskc -> sde
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskd -> sdd
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiske -> sdb
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskf -> sdc
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskg -> sdh
lrwxrwxrwx 1 root root 3 May 19 15:17 /dev/asmdiskh -> sdg
/dev/asm:
total 0
1.1.3 在ASM 環境中將磁碟加入到磁碟組中：
（1 ）使用GRID 使用者進入ASM 例項中，查詢ASM 磁碟已經能看到該磁碟情況：
SQL> select GROUP_NUMBER,DISK_NUMBER,MOUNT_STATUS,STATE,TOTAL_MB,PATH,NAME from v$asm_disk order by GROUP_NUMBER,DISK_NUMBER; GROUP_NUMBER DISK_NUMBER MOUNT_S STATE TOTAL_MB PATH NAME ------------ ----------- ------- -------- ---------- -------------------- -------------------- 0 0 CLOSED NORMAL 0 /dev/asmdiskh 1 0 CACHED NORMAL 51200 /dev/asmdiske DATA_0000 1 1 CACHED NORMAL 51200 /dev/asmdiskf DATA_0001 2 0 CACHED NORMAL 20480 /dev/asmdiskg ARCH_0000 3 0 CACHED NORMAL 1024 /dev/asmdiskb OCR_0000 3 1 CACHED NORMAL 1024 /dev/asmdiskc OCR_0001 3 2 CACHED NORMAL 1024 /dev/asmdiskd OCR_0002 7 rows selected.
（2 ）使用命令將磁碟加入到組ARCH 中。
使用 sqlplus ‘/as sysasm’ 登入
SQL> alter diskgroup ARCH ADD DISK '/dev/asmdiskh';
檢視磁碟組容量已經增加
SQL> select NAME,FREE_MB,TOTAL_MB FROM V$ASM_DISKGROUP; NAME FREE_MB TOTAL_MB ------------------------------ ---------- ---------- DATA 99315 102400 ARCH 39294 40960 OCR 2787 3072
確認另一個節點情況：
SQL> select GROUP_NUMBER,DISK_NUMBER,MOUNT_STATUS,STATE,TOTAL_MB,PATH,NAME from v$asm_disk order by GROUP_NUMBER,DISK_NUMBER; GROUP_NUMBER DISK_NUMBER MOUNT_S STATE TOTAL_MB PATH NAME ------------ ----------- ------- -------- ---------- -------------------- -------------------- 1 0 CACHED NORMAL 51200 /dev/asmdiske DATA_0000 1 1 CACHED NORMAL 51200 /dev/asmdiskf DATA_0001 2 0 CACHED NORMAL 20480 /dev/asmdiskg ARCH_0000 2 1 CACHED NORMAL 20480 /dev/asmdiskh ARCH_0001 3 0 CACHED NORMAL 1024 /dev/asmdiskb OCR_0000 3 1 CACHED NORMAL 1024 /dev/asmdiskc OCR_0001 3 2 CACHED NORMAL 1024 /dev/asmdiskd OCR_0002 7 rows selected.
至此，磁碟ASM 擴充套件完畢。
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/681781/viewspace-2693002/，如需轉載，請註明出處，否則將追究法律責任。
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