On Thu, Dec 20, 2001 at 12:30:10AM +0800, Stephen Liu wrote: > > > Whether a special controller with 3 channels for connecting 3 hard > > discs is > > > needed ?
You'll typically see 3-channel RAID controllers provide for 3 SCSI buses, not 3 ATA buses. Multiple drives on a SCSI bus can have I/O pending at the same time - this is not true on ATA drives. > 1) Is RAID 5 controller differs from other controller in design ? Typically a RAID 5 controller has write-back cache to help you with the performance hit you take when writing to RAID-5 sets. > 2) How many channels it has ? That's up to the vendor. It varies from 1 to a number well outside your budget... > 3) If it has 3 channels only, how can I connect 5 hard discs to > it? Therefore I have to connect 2 hard discs as slave. As I said, 3-channel RAID controllers are typically SCSI, and there is no master/slave concept. -- Ed Wilts, Mounds View, MN, USA mailto:[EMAIL PROTECTED] _______________________________________________ Redhat-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/redhat-list
