oracle asm disk清理磁盘头

[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_crs1 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.421849 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_crs2 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.42569 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_crs3 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.420077 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data1 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.424291 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data2 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.447183 s, 2.3 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data3 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.427341 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data4 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.441375 s, 2.4 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data5 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.430972 s, 2.4 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data6 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.436353 s, 2.4 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_data7 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.42695 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_fra1 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.424856 s, 2.5 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_fra2 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.431468 s, 2.4 GB/s
[root@localhost ~]# dd if=/dev/zero of=/dev/mapper/asm_fra3 bs=8192 count=128000
128000+0 records in
128000+0 records out
1048576000 bytes (1.0 GB) copied, 0.445462 s, 2.4 GB/s