第一步：创建asm磁盘

查看磁盘情况

SQL> col name for a40

set line 200

col path format a60

select name,path,state,HEADER_STATUS from v$asm_disk;

SQL> SQL> SQL>

NAME PATH STATE HEADER_STATU

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

/dev/asmdisk/asm-disk1 NORMAL MEMBER

/dev/asmdisk/asm-disk2 NORMAL CANDIDATE

DATA1 AFD:DATA1 NORMAL MEMBER

SQL> select group_number,disk_number,name,failgroup from v$asm_disk;

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP

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

0 0

0 1

1 0 DATA1 DATA1

创建磁盘组

SQL> create diskgroup tt external redundancy disk '/dev/asmdisk/asm-disk2';

Diskgroup created.

SQL> select name,path,state,HEADER_STATUS from v$asm_disk;

NAME PATH STATE HEADER_STATU

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

/dev/asmdisk/asm-disk1 NORMAL MEMBER

DATA1 AFD:DATA1 NORMAL MEMBER

TT_0000 /dev/asmdisk/asm-disk2 NORMAL MEMBER

SQL> select group_number,disk_number,name,failgroup from v$asm_disk;

GROUP_NUMBER DISK_NUMBER NAME FAILGROUP

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

0 0

1 0 DATA1 DATA1

2 0 TT_0000 TT_0000

查看磁盘头：

[grid@test ~]$ kfed read /dev/asmdisk/asm-disk2 aus=1M blkn=0

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 0 ; 0x004: blk=0

kfbh.block.obj: 2147483648 ; 0x008: disk=0

kfbh.check: 1327320159 ; 0x00c: 0x4f1d4c5f

kfbh.fcn.base: 0 ; 0x010: 0x00000000

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8

kfdhdb.driver.reserved[0]: 0 ; 0x008: 0x00000000

kfdhdb.driver.reserved[1]: 0 ; 0x00c: 0x00000000

kfdhdb.driver.reserved[2]: 0 ; 0x010: 0x00000000

kfdhdb.driver.reserved[3]: 0 ; 0x014: 0x00000000

kfdhdb.driver.reserved[4]: 0 ; 0x018: 0x00000000

kfdhdb.driver.reserved[5]: 0 ; 0x01c: 0x00000000

kfdhdb.compat: 186647040 ; 0x020: 0x0b200200

kfdhdb.dsknum: 0 ; 0x024: 0x0000

kfdhdb.grptyp: 1 ; 0x026: KFDGTP_EXTERNAL

kfdhdb.hdrsts: 3 ; 0x027: KFDHDR_MEMBER

kfdhdb.dskname: TT_0000 ; 0x028: length=7

kfdhdb.grpname: TT ; 0x048: length=2

kfdhdb.fgname: TT_0000 ; 0x068: length=7

kfdhdb.siteguid[0]: 0 ; 0x088: 0x00

kfdhdb.siteguid[1]: 0 ; 0x089: 0x00

kfdhdb.siteguid[2]: 0 ; 0x08a: 0x00

kfdhdb.siteguid[3]: 0 ; 0x08b: 0x00

kfdhdb.siteguid[4]: 0 ; 0x08c: 0x00

kfdhdb.siteguid[5]: 0 ; 0x08d: 0x00

kfdhdb.siteguid[6]: 0 ; 0x08e: 0x00

kfdhdb.siteguid[7]: 0 ; 0x08f: 0x00

kfdhdb.siteguid[8]: 0 ; 0x090: 0x00

kfdhdb.siteguid[9]: 0 ; 0x091: 0x00

kfdhdb.siteguid[10]: 0 ; 0x092: 0x00

kfdhdb.siteguid[11]: 0 ; 0x093: 0x00

kfdhdb.siteguid[12]: 0 ; 0x094: 0x00

kfdhdb.siteguid[13]: 0 ; 0x095: 0x00

kfdhdb.siteguid[14]: 0 ; 0x096: 0x00

kfdhdb.siteguid[15]: 0 ; 0x097: 0x00

kfdhdb.ub1spare[0]: 0 ; 0x098: 0x00

kfdhdb.ub1spare[1]: 0 ; 0x099: 0x00

kfdhdb.ub1spare[2]: 0 ; 0x09a: 0x00

kfdhdb.ub1spare[3]: 0 ; 0x09b: 0x00

kfdhdb.ub1spare[4]: 0 ; 0x09c: 0x00

kfdhdb.ub1spare[5]: 0 ; 0x09d: 0x00

kfdhdb.ub1spare[6]: 0 ; 0x09e: 0x00

kfdhdb.ub1spare[7]: 0 ; 0x09f: 0x00

kfdhdb.ub1spare[8]: 0 ; 0x0a0: 0x00

kfdhdb.ub1spare[9]: 0 ; 0x0a1: 0x00

kfdhdb.ub1spare[10]: 0 ; 0x0a2: 0x00

kfdhdb.ub1spare[11]: 0 ; 0x0a3: 0x00

kfdhdb.ub1spare[12]: 0 ; 0x0a4: 0x00

kfdhdb.ub1spare[13]: 0 ; 0x0a5: 0x00

kfdhdb.ub1spare[14]: 0 ; 0x0a6: 0x00

kfdhdb.ub1spare[15]: 0 ; 0x0a7: 0x00

kfdhdb.crestmp.hi: 33168938 ; 0x0a8: HOUR=0xa DAYS=0x11 MNTH=0x7 YEAR=0x7e8

kfdhdb.crestmp.lo: 2931100672 ; 0x0ac: USEC=0x0 MSEC=0x143 SECS=0x2b MINS=0x2b

kfdhdb.mntstmp.hi: 33168938 ; 0x0b0: HOUR=0xa DAYS=0x11 MNTH=0x7 YEAR=0x7e8

kfdhdb.mntstmp.lo: 2940670976 ; 0x0b4: USEC=0x0 MSEC=0x1c5 SECS=0x34 MINS=0x2b

kfdhdb.secsize: 512 ; 0x0b8: 0x0200

kfdhdb.blksize: 4096 ; 0x0ba: 0x1000

kfdhdb.ausize: 1048576 ; 0x0bc: 0x00100000

kfdhdb.mfact: 113792 ; 0x0c0: 0x0001bc80

kfdhdb.dsksize: 5120 ; 0x0c4: 0x00001400

kfdhdb.pmcnt: 2 ; 0x0c8: 0x00000002

kfdhdb.fstlocn: 1 ; 0x0cc: 0x00000001

kfdhdb.altlocn: 2 ; 0x0d0: 0x00000002

kfdhdb.f1b1locn: 2 ; 0x0d4: 0x00000002

kfdhdb.redomirrors[0]: 0 ; 0x0d8: 0x0000

kfdhdb.redomirrors[1]: 0 ; 0x0da: 0x0000

kfdhdb.redomirrors[2]: 0 ; 0x0dc: 0x0000

kfdhdb.redomirrors[3]: 0 ; 0x0de: 0x0000

kfdhdb.dbcompat: 168820736 ; 0x0e0: 0x0a100000

kfdhdb.grpstmp.hi: 33168938 ; 0x0e4: HOUR=0xa DAYS=0x11 MNTH=0x7 YEAR=0x7e8

kfdhdb.grpstmp.lo: 2931001344 ; 0x0e8: USEC=0x0 MSEC=0xe2 SECS=0x2b MINS=0x2b

kfdhdb.vfstart: 0 ; 0x0ec: 0x00000000

kfdhdb.vfend: 0 ; 0x0f0: 0x00000000

kfdhdb.spfile: 0 ; 0x0f4: 0x00000000

kfdhdb.spfflg: 0 ; 0x0f8: 0x00000000

kfdhdb.flags: 0 ; 0x0fc: 0x00000000

kfdhdb.f1b1fcn.base: 0 ; 0x100: 0x00000000

kfdhdb.f1b1fcn.wrap: 0 ; 0x104: 0x00000000

kfdhdb.ip[0]: 0 ; 0x108: 0x00

kfdhdb.ip[1]: 127 ; 0x109: 0x7f

kfdhdb.ip[2]: 0 ; 0x10a: 0x00

kfdhdb.ip[3]: 0 ; 0x10b: 0x00

kfdhdb.modstmp: 1721227432 ; 0x10c: 0x6697d8a8

kfdhdb.checklbl: 0 ; 0x110: 0x00

kfdhdb.verlbl: 0 ; 0x111: 0x00

kfdhdb.ub2spare: 0 ; 0x112: 0x0000

kfdhdb.sitelbl: ; 0x114: length=0

kfdhdb.fglbl: ; 0x124: length=0

kfdhdb.vsnnum: 318767104 ; 0x144: 0x13000000

可以看到磁盘信息完整。

查看磁盘组的兼容性信息

SQL> select name,state,allocation_unit_size,compatibility from v$asm_diskgroup;

NAME STATE ALLOCATION_UNIT_SIZE COMPATIBILITY

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

QQ DISMOUNTED 0 0.0.0.0.0

DATA MOUNTED 4194304 19.0.0.0.0

TT MOUNTED 1048576 11.2.0.2.0

可以看到TT 的兼容性是11.2

第二步：fdisk 破坏磁盘

首先卸载磁盘

SQL> alter diskgroup TT dismount;

Diskgroup altered.

fdisk 破坏磁盘

asm-disk2对应的是sdd磁盘

[root@test rules.d]# fdisk /dev/sdd

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0xbb8996e7.

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xbb8996e7

Device Boot Start End Blocks Id System

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1): 1

First sector (2048-10485759, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-10485759, default 10485759):

Using default value 10485759

Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xbb8996e7

Device Boot Start End Blocks Id System

/dev/sdd1 2048 10485759 5241856 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

lsblk 查看磁盘信息

[root@test rules.d]# lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 80G 0 disk

?𼰿𺲀sda1 8:1 0 1G 0 part /boot

?𺰿𺲀sda2 8:2 0 79G 0 part

?𼰿𺲀rhel-root 253:0 0 50G 0 lvm /

?𼰿𺲀rhel-swap 253:1 0 3.9G 0 lvm [SWAP]

?𺰿𺲀rhel-home 253:2 0 25.1G 0 lvm /home

sdb 8:16 0 20G 0 disk

sdc 8:32 0 2G 0 disk

sdd 8:48 0 5G 0 disk

?𺰿𺲀sdd1 8:49 0 5G 0 part

sr0 11:0 1 1024M 0 rom

可以看到sdd已经被分区了

查看asm磁盘信息

[root@test rules.d]# ll /dev/asmdisk/asm-disk*

lrwxrwxrwx 1 root root 6 Jul 17 10:52 /dev/asmdisk/asm-disk1 -> ../sdc

lrwxrwxrwx 1 root root 7 Jul 17 10:55 /dev/asmdisk/asm-disk2 -> ../sdd1 --》asm-disk2指向了sdd1，原来是sdd

现在我们观察磁盘的破坏情况：

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=0,j=0

kfbh.type: 2 ; 0x002: KFBTYP_FREESPC

i=1,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=2,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=3,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=4,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=5,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=6,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=7,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=8,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=9,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

可以看到fdisk分区不格式化的情况下只有磁盘头被破坏了

我们知道，asm 从11.1.0.7 开始磁盘头会自动备份到AU1的倒数第二个asm元数据块中，知道au块大小和asm元数据块大小后就能找到这个块的编号

[grid@test ~]$ kfed read /dev/sdd aus=1M blkn=254 aun=1 |more

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 254 ; 0x004: blk=254

kfbh.block.obj: 2147483648 ; 0x008: disk=0

kfbh.check: 1327320225 ; 0x00c: 0x4f1d4ca1

kfbh.fcn.base: 0 ; 0x010: 0x00000000

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

或者，直接搜一下

for (( j=0; j<3; j++ ));do

for (( i=0; i<256; i++ ));do

if kfed read /dev/sdd aun=$j blkn=$i aus=1048576| grep KFBTYP_DISKHEAD

then

echo i=$i,j=$j

fi

done;

kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD

i=254,j=1

第三补，修复asm磁盘

我们可以看到只有asm磁盘的盘头位置坏了，正常asm repair应该就可以进行修复，下面测试

[grid@test ~]$ kfed repair /dev/sdd aus=1M

[grid@test ~]$ kfed read /dev/sdd aus=1M blkn=0 aun=0

kfbh.endian: 1 ; 0x000: 0x01

kfbh.hard: 130 ; 0x001: 0x82

kfbh.type: 1 ; 0x002: KFBTYP_DISKHEAD

kfbh.datfmt: 1 ; 0x003: 0x01

kfbh.block.blk: 0 ; 0x004: blk=0

kfbh.block.obj: 2147483648 ; 0x008: disk=0

kfbh.check: 1327320159 ; 0x00c: 0x4f1d4c5f

kfbh.fcn.base: 0 ; 0x010: 0x00000000

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

kfdhdb.driver.provstr: ORCLDISK ; 0x000: length=8

kfdhdb.driver.reserved[0]: 0 ; 0x008: 0x00000000

kfdhdb.driver.reserved[1]: 0 ; 0x00c: 0x00000000

kfdhdb.driver.reserved[2]: 0 ; 0x010: 0x00000000

kfdhdb.driver.reserved[3]: 0 ; 0x014: 0x00000000

kfdhdb.driver.reserved[4]: 0 ; 0x018: 0x00000000

kfdhdb.driver.reserved[5]: 0 ; 0x01c: 0x00000000

kfdhdb.compat: 186647040 ; 0x020: 0x0b200200

尝试挂载磁盘

SQL> alter diskgroup TT mount;

Diskgroup altered.

相关日志：

SQL> alter diskgroup TT mount

2024-07-17T11:11:37.514860-04:00

NOTE: cache registered group TT 2/0x66BFAAC5

NOTE: cache began mount (first) of group TT 2/0x66BFAAC5

NOTE: Assigning number (2,0) to disk (/dev/asmdisk/asm-disk2)

2024-07-17T11:11:37.581355-04:00

cluster guid (779587564ff57f3fbfa7240135ffdf89) generated for PST Hbeat for instance 1

2024-07-17T11:11:43.588192-04:00

NOTE: GMON heartbeating for grp 2 (TT)

GMON querying group 2 at 35 for pid 25, osid 54128

2024-07-17T11:11:43.589298-04:00

NOTE: cache is mounting group TT created on 2024/07/17 10:43:43

NOTE: cache opening disk 0 of grp 2: TT_0000 path:/dev/asmdisk/asm-disk2

NOTE: 07/17/24 11:11:43 TT.F1X0 found on disk 0 au 2 fcn 0.0 datfmt 1

2024-07-17T11:11:43.589772-04:00

NOTE: cache mounting (first) external redundancy group 2/0x66BFAAC5 (TT)

NOTE: cache recovered group 2 to fcn 0.3

NOTE: redo buffer size is 256 blocks (1056768 bytes)

2024-07-17T11:11:43.604247-04:00

NOTE: LGWR attempting to mount thread 1 for diskgroup 2 (TT)

NOTE: LGWR found thread 1 closed at ABA 2.1 lock domain=0 inc#=0 instnum=1

NOTE: LGWR mounted thread 1 for diskgroup 2 (TT)

2024-07-17T11:11:43.608994-04:00

NOTE: LGWR opened thread 1 (TT) at fcn 0.3 ABA 3.2 lock domain=2 inc#=0 instnum=1 gx.incarn=1723837125 mntstmp=2024/07/17 11:11:43.605000

2024-07-17T11:11:43.609228-04:00

NOTE: cache mounting group 2/0x66BFAAC5 (TT) succeeded

NOTE: cache ending mount (success) of group TT number=2 incarn=0x66bfaac5

2024-07-17T11:11:43.661086-04:00

NOTE: Instance updated compatible.asm to 11.2.0.2.0 for grp 2 (TT).

2024-07-17T11:11:43.661843-04:00

NOTE: Instance updated compatible.rdbms to 10.1.0.0.0 for grp 2 (TT).

2024-07-17T11:11:43.663327-04:00

SUCCESS: diskgroup TT was mounted

2024-07-17T11:11:43.691534-04:00

SUCCESS: alter diskgroup TT mount

2024-07-17T11:11:43.751339-04:00

NOTE: diskgroup resource ora.TT.dg is online

NOTE: diskgroup resource ora.TT.dg is updated

再次尝试分区格式化后是否能够挂载

首先 dismount磁盘

SQL> alter diskgroup TT dismount;

Diskgroup altered.

然后fdisk 分区格式化磁盘

分区

[root@test rules.d]# fdisk /dev/sdd

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0xca04d013.

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xca04d013

Device Boot Start End Blocks Id System

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1): 1

First sector (2048-10485759, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-10485759, default 10485759):

Using default value 10485759

Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xca04d013

Device Boot Start End Blocks Id System

/dev/sdd1 2048 10485759 5241856 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

格式化磁盘

[root@test rules.d]# mkfs.ext4 /dev/sdd1

mke2fs 1.42.9 (28-Dec-2013)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

327680 inodes, 1310464 blocks

65523 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=1342177280

40 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736

Allocating group tables: done

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

这个时候查看磁盘信息

[grid@test ~]$ kfed read /dev/sdd aus=1M blkn=0 aun=0

kfbh.endian: 0 ; 0x000: 0x00

kfbh.hard: 0 ; 0x001: 0x00

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

kfbh.datfmt: 0 ; 0x003: 0x00

kfbh.block.blk: 0 ; 0x004: blk=0

kfbh.block.obj: 0 ; 0x008: file=0

kfbh.check: 0 ; 0x00c: 0x00000000

kfbh.fcn.base: 0 ; 0x010: 0x00000000

kfbh.fcn.wrap: 0 ; 0x014: 0x00000000

kfbh.spare1: 0 ; 0x018: 0x00000000

kfbh.spare2: 0 ; 0x01c: 0x00000000

000000000 00000000 00000000 00000000 00000000 [................]

Repeat 26 times

0000001B0 00000000 00000000 CA04D013 20000000 [............... ]

0000001C0 B4830021 08008CA8 F8000000 0000009F [!...............]

0000001D0 00000000 00000000 00000000 00000000 [................]

Repeat 1 times

0000001F0 00000000 00000000 00000000 AA550000 [..............U.]

000000200 00000000 00000000 00000000 00000000 [................]

Repeat 223 times

KFED-00322: invalid content encountered during block traversal: [kfbtTraverseBlock][Invalid OSM block type][][0]

此时磁盘已经是损坏的了，我们分析下损坏程度

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=0,j=0

kfbh.type: 2 ; 0x002: KFBTYP_FREESPC

i=1,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=2,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=3,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=4,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=5,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=6,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=7,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=8,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=9,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=10,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=11,j=0

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=55,j=3

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=56,j=3

au0只有asm 磁盘头被损坏，但是au1 au2 au3 等被损坏了很多信息

[grid@test ~]$ kfed repair /dev/sdd aus=1M

KFED-00320: invalid block num1 = [254], num2 = [1], error = [endian_kfbh]

修复报上述错误

for (( j=0; j<3; j++ ));do

for (( i=0; i<256; i++ ));do

if kfed read /dev/sdd aun=$j blkn=$i aus=1048576| grep KFBTYP_DISKHEAD

then

echo i=$i,j=$j

fi

done;

查询磁盘头的脚本也找不到相关信息

尝试xfs文件系统格式化

其他步骤略过，直接测试

开始前：

[grid@test ~]$ lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 80G 0 disk

?𼰿𺲀sda1 8:1 0 1G 0 part /boot

?𺰿𺲀sda2 8:2 0 79G 0 part

?𼰿𺲀rhel-root 253:0 0 50G 0 lvm /

?𼰿𺲀rhel-swap 253:1 0 3.9G 0 lvm [SWAP]

?𺰿𺲀rhel-home 253:2 0 25.1G 0 lvm /home

sdb 8:16 0 20G 0 disk

sdc 8:32 0 2G 0 disk

sdd 8:48 0 5G 0 disk

SQL> create diskgroup tt external redundancy disk '/dev/asmdisk/asm-disk2';

Diskgroup created.

SQL> select name,path,state,HEADER_STATUS from v$asm_disk;

NAME PATH STATE HEADER_STATU

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

/dev/asmdisk/asm-disk1 NORMAL MEMBER

DATA1 AFD:DATA1 NORMAL MEMBER

TT_0000 /dev/asmdisk/asm-disk2 NORMAL MEMBER

[root@test rules.d]# fdisk /dev/sdd

Welcome to fdisk (util-linux 2.23.2).

Changes will remain in memory only, until you decide to write them.

Be careful before using the write command.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0xe7340cc0.

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xe7340cc0

Device Boot Start End Blocks Id System

Command (m for help): n

Partition type:

p primary (0 primary, 0 extended, 4 free)

e extended

Select (default p): p

Partition number (1-4, default 1): 1

First sector (2048-10485759, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-10485759, default 10485759):

Using default value 10485759

Partition 1 of type Linux and of size 5 GiB is set

Command (m for help): p

Disk /dev/sdd: 5368 MB, 5368709120 bytes, 10485760 sectors

Units = sectors of 1 * 512 = 512 bytes

Sector size (logical/physical): 512 bytes / 512 bytes

I/O size (minimum/optimal): 512 bytes / 512 bytes

Disk label type: dos

Disk identifier: 0xe7340cc0

Device Boot Start End Blocks Id System

/dev/sdd1 2048 10485759 5241856 83 Linux

Command (m for help): w

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@test rules.d]# mkfs.xfs /dev/sdd1

meta-data=/dev/sdd1 isize=512 agcount=4, agsize=327616 blks

= sectsz=512 attr=2, projid32bit=1

= crc=1 finobt=0, sparse=0

data = bsize=4096 blocks=1310464, imaxpct=25

= sunit=0 swidth=0 blks

naming =version 2 bsize=4096 ascii-ci=0 ftype=1

log =internal log bsize=4096 blocks=2560, version=2

= sectsz=512 sunit=0 blks, lazy-count=1

realtime =none extsz=4096 blocks=0, rtextents=0

分区格式化后：

[grid@test ~]$ lsblk

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT

sda 8:0 0 80G 0 disk

?𼰿𺲀sda1 8:1 0 1G 0 part /boot

?𺰿𺲀sda2 8:2 0 79G 0 part

?𼰿𺲀rhel-root 253:0 0 50G 0 lvm /

?𼰿𺲀rhel-swap 253:1 0 3.9G 0 lvm [SWAP]

?𺰿𺲀rhel-home 253:2 0 25.1G 0 lvm /home

sdb 8:16 0 20G 0 disk

sdc 8:32 0 2G 0 disk

sdd 8:48 0 5G 0 disk

?𺰿𺲀sdd1 8:49 0 5G 0 part

sr0 11:0 1 1024M 0 rom

loop0 7:0 0 4.3G 0 loop /mnt

SQL> select name,path,state,HEADER_STATUS from v$asm_disk;

NAME PATH STATE HEADER_STATU

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

/dev/asmdisk/asm-disk1 NORMAL MEMBER

/dev/asmdisk/asm-disk2 NORMAL CANDIDATE

DATA1 AFD:DATA1 NORMAL MEMBER

查询损坏情况:

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=0,j=0

kfbh.type: 2 ; 0x002: KFBTYP_FREESPC

i=1,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=2,j=0

kfbh.type: 3 ; 0x002: KFBTYP_ALLOCTBL

i=255,j=0

kfbh.type: 83 ; 0x002: *** Unknown Enum ***

i=0,j=1

kfbh.type: 51 ; 0x002: *** Unknown Enum ***

i=1,j=1

kfbh.type: 51 ; 0x002: *** Unknown Enum ***

i=2,j=1

kfbh.type: 66 ; 0x002: *** Unknown Enum ***

i=3,j=1

kfbh.type: 83 ; 0x002: *** Unknown Enum ***

i=0,j=1

kfbh.type: 51 ; 0x002: *** Unknown Enum ***

i=1,j=1

kfbh.type: 51 ; 0x002: *** Unknown Enum ***

i=2,j=1

kfbh.type: 66 ; 0x002: *** Unknown Enum ***

i=3,j=1

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

i=4,j=1

kfbh.type: 0 ; 0x002: KFBTYP_INVALID

其他au问题不大，测试恢复

[grid@test ~]$ kfed repair /dev/sdd aus=1M

不报错，但是mount磁盘报错

SQL> alter diskgroup TT mount;

alter diskgroup TT mount

*

ERROR at line 1:

ORA-15032: not all alterations performed

ORA-15017: diskgroup "TT" cannot be mounted

ORA-15040: diskgroup is incomplete

ITPub博客

修复被 fdisk 分区后的asm磁盘

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