How many hdd can be connect in one channel

[Dinesh_11]

.....

 

[Pyree]

SATA- 1 HDD per sata port unless you use port splitter.
PATA- 2 on the "split" cable and jumper setting master and slave

 

[WyomingKnott]

Pyree is correct. And, before you ask, a port splitter requires power and only works with SATA controllers that support this feature. Such controllers are more expensive than those that do not. Look up "SATA port multiplier" for information.