I have install my fc6 server with RAID-1 software on 2 SATA HD. All work fine.
My question is:
If HD1 crash, HD2 is ready for boot the system? I have see witch the MBR of the 2 disk is different. (see follow explanation)...
I must copy with this command:
# dd bs=512 count=1 if=/dev/sda of=/dev/sdb
MBR of first disk on MBR of second disk?
Or this operation is not necessary?
Many thanks!
[root@s-scarwall ~]# dd bs=512 count=1 if=/dev/sda of=/tmp/sda 1+0 records in 1+0 records out 512 bytes (512 B) copied, 0,0119784 seconds, 42,7 kB/s [root@s-scarwall ~]# dd bs=512 count=1 if=/dev/sdb of=/tmp/sdb 1+0 records in 1+0 records out 512 bytes (512 B) copied, 0,0175179 seconds, 29,2 kB/s [root@s-scarwall ~]# diff /tmp/sd? Binary files /tmp/sda and /tmp/sdb differ [root@s-scarwall ~]# hexdump -C /tmp/sda>/tmp/sda.txt [root@s-scarwall ~]# hexdump -C /tmp/sdb>/tmp/sdb.txt [root@s-scarwall ~]# diff /tmp/sd?.txt 5c5
< 00000040 80 00 00 80 41 24 02 00 00 08 fa 90 90 f6 c2 80 |....A$..........|
00000040 81 00 00 80 41 24 02 00 00 08 fa 90 90 f6 c2 80 |....A$..........|
28c28
< 000001b0 00 00 00 00 00 00 00 00 21 d0 00 00 00 00 80 01 |........!.......|
000001b0 00 00 00 00 00 00 00 00 bf 7e 08 00 00 00 80 01 |.........~......|
[root@s-scarwall ~]#