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sas expander vs ?

P

planum

n00b
Joined
Mar 10, 2011
Messages
17
Apparently a very basic tenet is escaping me regarding RAID SAS PCI express x8 cards and sas expanders. So if someone could clarify...
I have an areca 1221x raid card with 2x 8088 output connections that I have tried to connect to multiple 12 bay hard drive expansion cases with ?LSI based sas expander backplanes and a single 8088 port (IN). The areca NEVER recognizes any of the external drives. Is this a limitation of the intel IOP 348 chip?? I have been able to get LSI raid cards and HP raid cards to recognize them fine. the areca documentation says it supports external raid/jbod via 8088 cable but I have been unable to resolve this and make it recognize the external drives. any help would be greatly appreciated.
 
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Many thanks, I could not find the specifics on the areca website either thanks for that link. The expansion chassis allows for SAS or SATA drives.
I have SATA drives in the expansion chassis but I expect the issue is the backplane chip communicates via a SAS expander protocol that the Areca can't recognize.
 
Yes, a SATA device can work on a SAS HBA or SAS expander, but a SAS device or SAS expander cannot work on a SATA HBA.

SAS > SATA
 
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