Se este for o caso, IMO, é quase sempre melhor usar o RAID de software de ações que está incluído em qualquer distribuição Linux. Eu usei as ferramentas mdadm
de software RAID + por mais de uma década e nunca tive problemas com isso. O desempenho é sólido e há tutoriais e guias extensos disponíveis na internet para orientá-lo nas várias tarefas, como configurá-lo, aumentá-lo, encolhê-lo, adicionar / remover HDDs, etc.
Este guia intitulado: 10 fatos surpreendentes sobre o RAID também concordaram com essa posição .
2. Software RAID is almost always a better choice than hardware RAID
Software RAID has advanced significantly in the last few years (as of 2012). Hardware RAID still has the three key vulnerabilities it has always had: First, it is expensive. Second, if your RAID card fails, your RAID volume fails; it is a single point of failure. Third, if your RAID card fails, you must find an exact replacement for that card to recover your data. On the other hand, software RAID costs nothing, and if your controller card or motherboard fail, you can just move your disks to another machine and set up the appropriate software to read them. ...
3. Some “RAID cards” aren’t hardware RAID
Over the last few years SATA disk controller cards and motherboards have come out that claim to offer hardware RAID. They are really just disk controllers with BIOS that implements RAID in software. How can you detect these cards and motherboards? Usually price is the giveaway. A $20.00 card is not likely to implement true hardware RAID. Also these cards usually offer windows-only support. Here’s a good writeup.