DATOptic ARC-1680 Series - Manual (Page 26)

HARDWARE INSTALLATION
26
In the backplane solution, SAS/SATA drives are directly connected
to SAS system backplane or through an expander board. The
number of SAS/SATA drives is limited to the number of slots
available on the backplane. Some backplanes support daisy chain
expansion to the next backplanes. The SAS RAID controller can
support daisy-chain up to 8 enclosures. The maximum drive no.
is 128 devices through 8 enclosures. The following figure shows
how to connect the external Min SAS cable from the SAS RAID
controller that has external connectors to the external drive boxes
or drive enclosures.
The following table is the max no. of SAS RAID controller supported:
Disks/Enclosure Expander Disks/Controller Volume
Max No. 32 8 128 128
Figure 2-8, External connector to a drive box or drive enclosure
Note:
1. The maximum no. is 32 disk drives included in a single
RAID set.