Licno sam na dva externa diska preko e-sata stavio po dve particije, pri instalaciji ih stavio u softverski raid miroring (po jednu od te dve particije, druge dve su za swap), instalirao linux koji se dize sa tih diskova i i dan danas radi bez problema.
Citat:
# mdadm --detail /dev/md0
/dev/md0:
...
Raid Level : raid1
Array Size : 242091380 (230.88 GiB 247.90 GB)
Used Dev Size : 484182760 (461.75 GiB 495.80 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
State : active
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Number Major Minor RaidDevice State
0 8 18 0 active sync /dev/sdb2
1 8 34 1 active sync /dev/sdc2
...
# fdisk -l /dev/sdb
Disk /dev/sdb: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0xfffd875a
Device Boot Start End Blocks Id System
/dev/sdb1 1 262 2104483+ 82 Linux swap / Solaris
/dev/sdb2 * 263 30401 242091517+ fd Linux raid autodetect
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