Why are we not seeing S-ATA 4.0?

[Splashzed]

Hi guys,

I was wondering online (wikipedia) and was thinking about usb 3.1 which has a speed of 10 Gb/s that put in GigaBytes is 1.25 a second! That is freaking amazing. With usb 3.1 they are also introducing the type c connector which we all know is going to be great. So thunderbolt v2 is 20 Gb/s which in GigaBytes is 2.50 a sec but, returning to my point, the latest sata (3.0) is 6 Gb/s (0.75 GigaBytes per sec) so why are we getting so fast "external" connections when we can't even come close to that speed in a common environment (how many of you have a pci-e ssd?)?

I hope you get what i am trying to say

[Glenwing]

It's here, it's just called SATA Express.

[tmlhalo]

SATA Express is 10 Gb/s
 

[dadasmithywinkle]

Hi guys,

I was wondering online (wikipedia) and was thinking about usb 3.1 which has a speed of 10 Gb/s that put in GigaBytes is 1.25 a second! That is freaking amazing. With usb 3.1 they are also introducing the type c connector which we all know is going to be great. So thunderbolt v2 is 20 Gb/s which in GigaBytes is 2.50 a sec but, returning to my point, the latest sata (3.0) is 6 Gb/s (0.75 GigaBytes per sec) so why are we getting so fast "external" connections when we can't even come close to that speed in a common environment (how many of you have a pci-e ssd?)?

I hope you get what i am trying to say

SATA Express is the next iteration but it's gonna be a while.

[FlighterLuid]

We're gonna need a new port for more bandwidth (because more pins), which is why USB 3.0 has more pins than 2.0 (but those pins were spaced poorly, 3.0 added pins where there was space to), and has a huge header compared to 2.0. SATA Express was designed for that extra bandwidth, which is why it's not the same port as SATA 1, 2 & 3.

[Splashzed]

Oh that's perfect, are there any ssds that use sata express?

[tmlhalo]

Oh that's perfect, are there any ssds that use sata express?

Not any SSDs that use it yet to my knowledge. Though there are a few M.2 drives and the M.2 port is fairly common and goes up to 10 GB/s.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820147366&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

[Glenwing]

Oh that's perfect, are there any ssds that use sata express?

 

Nope.

[Splashzed]

Not any SSDs that use it yet to my knowledge. Though there are a few M.2 drives and the M.2 port is fairly common and goes up to 10 GB/s.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820147366&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

Yeah i know about M.2 but anyway thank you guys i should have done a better research and a last thing, M.2 doesn't have any drawbacks against sata3 or sata express?

Edit: am i wrong or sata express uses pci lanes? And that is not backcompatible to sata3;2;1 i still think they should release a more "standard" connector and really using pci lanes for storage is not optimal in my opinion

[Captain_WD]

Hi guys,

I was wondering online (wikipedia) and was thinking about usb 3.1 which has a speed of 10 Gb/s that put in GigaBytes is 1.25 a second! That is freaking amazing. With usb 3.1 they are also introducing the type c connector which we all know is going to be great. So thunderbolt v2 is 20 Gb/s which in GigaBytes is 2.50 a sec but, returning to my point, the latest sata (3.0) is 6 Gb/s (0.75 GigaBytes per sec) so why are we getting so fast "external" connections when we can't even come close to that speed in a common environment (how many of you have a pci-e ssd?)?

I hope you get what i am trying to say

 

 

Hey Splashzed,

 

At this point neither SATA HDDs nor SATA SSDs can go over the limit of SATA3 (6Gb/s) so a new SATA type that is backwards compatible is sort of pointless to introduce. The new SATAe is much faster (as the guys mentioned) but for now, you can only utilize it with M.2 drives and RAM disks (which both are still too expensive to produce in reasonable sizes like common HDDs and SSDs). There have been projects to make SATAe more popular, but for now SATA3 remains the most commonly used port for mass storage. With SSDs' prices going down, the regular consumer will have much more access to speeds 5 times faster than conventional HDDs and SSD-only builds with adequate amount of storage.

 

Captain_WD.

[KemoKa]

Yeah i know about M.2 but anyway thank you guys i should have done a better research and a last thing, M.2 doesn't have any drawbacks against sata3 or sata express?

Edit: am i wrong or sata express uses pci lanes? And that is not backcompatible to sata3;2;1 i still think they should release a more "standard" connector and really using pci lanes for storage is not optimal in my opinion

No, you're completely right, SATA express uses the PCI Express bus. Its backwards compatibility will depend on what they implement between the bus and the connector. Remember, PCI Express is an extremely general-purpose bus, you can put all sorts of weird crap on there like USB 2.0, 3.0, graphics cards, RAID controllers, and yes, SATA cards. They could easily make SATAe backwards compatible if they really wanted.

 

And in terms of using PCIe lanes for storage, it's incredibly optimal because PCI Express just happens to be one of the fastest buses in the system. There is almost nothing better other than the RAM bus. That's why you can get PCIe SSDs like the Revodrive which will get about 2GB/s read and write. And then you can RAID those together if you really really wanted to. For storage options, PCIe is king.

[Dimwitted]

There's several things going on here. It will take a completely new architecture to get all the new things into the mix. Can you say Skylake? AHCI has to be modified or replaced. SATA3 has to be updated. More lanes have to be available on the PCI bus or another bus has to be dedicated for all the faster protocols that are coming. It's no accident that the X99 platform has 4 times the channels that the Z boards do.

 

Patience Padwan.

[Splashzed]

Yeah no i get what you guys are saying but what i mean is if satae is the next iteration of sata then i guess when it becomes a standard we will have motherboards replacing sata3 with satae altogether and that's when we will not be able (if not with an adapter) to use our sata3 drives i mean they will have to keep both plugs to do so and yeah i always thought pci lanes have to get increased is that really expensive? Intel just increases them in very expensive cpus..the 4790k which retails at 300+ $ only has 16...we see an increase from that in lga 2011 cpus but they are really expensive and if ssds start using pci lanes Intel will have to make some changes

[handruin]

There is a 12 Gb SAS bus available today but it's not at all common (yet) in servers let alone desktop use.  The interface exists so it's possible to surpass SATA Express for now.  I don't understand why we even need a segmented SATA/SAS any more.  I'd love to see SATA deprecated and we all transition to SAS.