SCSI, SAS and FC Controller

["Hairul Ikmal Mohamad Fuzi" <hairul.ikmal@xxxxxxxxx>]

Greetings,

Currently, we have several Direct Attached Storage (DAS) units,
connected to respective servers through Adaptec SCSI Controller.

1) Most of the time we used 80Mbit/s for external SCSI devices (in
this case, the DAS itself). Is it true the maximum speed for external
SCSI devices would be up to 80Mbit/s? Tried to change to 320Mbit/s but
somehow the kernel crashed. Is there any specific reason why some (or
all) external devices can only go up to 80Mbit/s?

2) We were thinking to use SAS or FC HBA for our next DAS but I'm not
sure which brand/card does has the support in CentOS/Linux in terms of
kernel module/driver,compatibility and performance. Can anyone give
suggestions based on their experience?

TIA.

-Ikmal
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