My Book DUO showed a problem related with a disk in RAID 1(FAILED DISK).
I bought a new disk, TOSHIBA 3TB 7500rpm, more fast than failed disk. So, now I have a RAID1 with 2 disks: (A) - TOSHIBA 3TB 7500rpm and (B), WD 3TB GREEN 5400rpm.
When I turn on My Book DUO, a few minutes later a get a RED LIGHT.
Are there some limit about use different rpm or manufactured by other companies?
I refuse to accept that I can not use disks of other companies, or faster than.