Monday, May 26, 2008

SAS vs. SATA

A question from a reader asks about the difference between Serial Attached SCSI (SAS) and Serial ATA (SATA) and which is better for our types of applications.

Tech On-line has a great article that explains these two technologies. Check it out by clicking here. The site does require registration, but it's free. And ... once in, you'll have an outstanding resource at your disposal.

"In general, SAS drives are used in systems which require the highest performance in terms of data transfer and reliability, and SATA drives are used in systems where cost is a more important factor than performance."

"SAS systems are designed to operate in full-duplex mode, meaning that data can be transmitted
and received to and from the drive simultaneously, compared to the half duplex mode supported with SATA, where communication can only take place in one direction at a time. In addition, SATA systems are designed to support connectivity with 1m cables to a single drive with a host port. SAS was designed to support connections with up to 8m cables, and can support the use of expanders which allow for connection to multiple SAS drives to a single host port."

SAS looks like the winner ... 

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