With SAS expanders you're typically limited at the single SAS connector up to the rated protocol speed. e.g. a single-ported SAS2 6Gbps expander has a theoretical throughput limit of 48Gbps(SAS cable supports 4 internal lanes) from all 24 bays. Not really an issue if you're using mechanical disks, could be something to think about if you have 24 solid state disks.Is there a benefit for getting individual SATA ports vs. the ones with a few SAS ports?
I think MarkLuvcCS may have been asking about the SC846A which doesn't use a SAS expander and is almost identical to the 846TQ except it has 6 SAS connectors instead of 24 SATA style connectors. One advantage that both the 846A and 846TQ share is the fact that backplane doesn't limit the speed of the drives at all. In both the SC846A and 846TQ, each drive has a dedicated connection from the backplane to the HBA or RAID controller and can operate at full bandwidth.With SAS expanders you're typically limited at the single SAS connector up to the rated protocol speed. e.g. a single-ported SAS2 6Gbps expander has a theoretical throughput limit of 48Gbps(SAS cable supports 4 internal lanes) from all 24 bays.
I bought one , that was very old 84TQ with non PWM fans for backplane.This is the seller I bought my 846TQ from a few years ago, their communication was great and the 846TQ is still going strong!
Absolutely right, I ended up just getting a shelf for it to sit on so I could put it in my rack. The fans still spin down when the temps are low and it's in a soundproof cabinet anyway so it doesn't really matter to me.I bought one , that was very old 84TQ with non PWM fans for backplane.
finding the rail is hard and very expensive since the old one has wide rail instead of current narrow rail.