===== RAID データ復旧 メモ =====
root@Knoppix:~$ sudo -s
root@Knoppix:~# modprobe md_mod
root@Knoppix:~# swapoff -a
root@Knoppix:~# dmsetup remove_all
root@Knoppix:~# dmsetup ls
No devices found
root@Knoppix:~# mdadm -A /dev/md0 /dev/sda3 /dev/sdb1 /dev/sdc1 /dev/sdd1
mdadm: /dev/md0 has been started with 4 drives.
root@Knoppix:~# mount /dev/md0 /media/test
===== RAID 情報クリア =====
==== FreeBSD ====
# geom disk list
Geom name: ada2
Providers:
1. Name: ada2
Mediasize: 2000398934016 (1.8T)
Sectorsize: 512
Stripesize: 4096
Stripeoffset: 0
Mode: r0w0e0
fwsectors: 63
fwheads: 16
セクタ数(計算式): Mediasize: 2000398934016 ÷ Sectorsize: 512 = 3907029168 Sector
# dd if=/dev/zero of=/dev/ada2 bs=512 count=1 seek=3907029167
1+0 records in
1+0 records out
512 bytes transferred in 0.000154 secs (3329432 bytes/sec)