Christopher Poelker discusses a past expert response about the differences of SCSI and IDE drives. Chris clears up some points raised by one reader in this comparison between SCSI and IDE drives.
I read your Ask the Expert answer on the comparison between SCSI HDD and IDE HDD. In case of an IDE-based RAID system, I have been wondering whether parity generation explained below has happened or not.
Chris Poelker's response:
SCSI is used in high-end systems due to the advanced feature/functionality of the SCSI command set. The ability to use Tag command queuing and active/active disk ports give SCSI and architectural advantage over IDE (Integrated Drive Electronics) disk solutions. The server can tell the SCSI controller to do a write and those writes can be queued on the controller so the server can go off and do more productive work instead of waiting for the acknowledgment that the write was completed.
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