SCSI (Small Computer System Interface), often called parallel SCSI, is almost 30 years old and can hardly keep up with the demands of today's IT environment. Serial Attached SCSI (SAS) was developed to address the limitations inherent in SCSI. This article highlights the differences between these two interfaces and points out the attributes that account for the increasing popularity of SAS.
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Member since:
2008-10-23
Member since:2008-12-15
No, I am sorry. That would be WAY to fast for the (actual) drives throughput on the hardware itself, not even mentioning the interfaces.
3 Gigabit/sec == 300+MB/sec (depending on your source and setup supposedly 322MB/sec w/o EC)
3GigaBytes/sec == at least 24Gigabits/sec without any form of correction
Parallel SCSI has been stuck at "U320" for a while, and it has never been able to really truly been able to sustain (even close to) 320MB/sec.
Hey, lets look at the controllers... oh look at that, models from Adaptec, Mega (et al) all focused on the same chipsets... supporting either SAS or SATAII at 3G-BIT PER SECOND
Lets think on that before we jump.
My Edit... leaving for proof I'm an idiot:
And YES, I now read comment properly. (BAD GREG! Naughty GREG!)
Edited 2009-01-08 22:22 UTC
Member since:2005-10-15
yeah it's bad maners to use gbit vs mbyte in the comparison. on quick read people will go ooh sas is so much faster.
of course sas will have that speed to every disk so it's good for raid systems and such.
then again when people need lots of disk's they use external cabinets for those and they still only use one cable to connect all of the disk's so then we are back to the same problems of many disk's sharing one bus that goes around 300MB/s
Member since:2005-07-20
Member since:2005-07-07
People needing lots of external storage connect via fibre channel with multiple paths for redundancy and performance. Currently fibre channel products are available in speeds up to 8Gbs per connection.
Also fibre channel over ethernet (FCoE) or iSCSI via 10Gbs ethernet are alternatives for high speed external storage. Again multiple paths can be used for redundancy and performance.