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Given all these options, if you're looking for a RAID solution,
you need to think carefully about what you want. Depending on what
you want to do, and which RAID level you wish to use, some cards may
be better than others. SCSI-to-SCSI adapters may not be as good as
host-based adapters, for example. Michael Neuffer (
neuffer@uni-mainz.de), the author of the EATA-DMA
driver, has a nice discussion about this on his
Linux High Performance SCSI and RAID page.
The enclosure type affects the hot swap-ability of the drive, the
warning systems (i.e., whether there will be indication of failure,
and whether you will know which drive has failed), and what kind of
treatment your drive receives (for example, redundant cooling and
power supplies). We used the DPT supplied enclosures which work
extremely well, but they are expensive.
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