Alan Cox writes:
A modern PC is rather good at doing RAID in software and PCI Express fixes the main bottleneck of RAID1 in software. Its also generally true that a desktop PC has lots and lots of spare CPU cycles to use for RAID work.
Also, with the right hardware, failed drives can be swapped without shutting the server down. AFAIK it can only be done with SCSI drives, but with SATA hardware being supported by the scsi subsystem, it'll probably work with SATA drives too.
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