Confuse about sata 6gb external HDD

[carambo]

Hi, I found this card (http://eshop.macsales.com/item/Newer Technology/MXPCIE6GS2/) supposed to support sata3 up to 6gb on the macpro, but cannot find the relevant external hdd enclosure to support sata3 6gb... Is it on the market yet ?? Txs

 

[AdrianK]

EDIT: never mind, I missed the point of the question.

 

[nanofrog]

SATA connectors used in external enclosures are just electrical contacts (wire), not active circuits.

So it will pass 1.5Gb/s, 3.0Gb/s, or 6.0Gb/s, depending on the slowest link in the chain (drive or SATA controller it's attached to). But if both the disk and card are capable of negotiating 6.0Mb/s, that's what they'll connect at.

Keep in mind, with 6.0Gb/s, mechanical disks cannot come close to saturating it (can't even saturate 3.0Gb/s), so it's really suited to recent SSD's which can exceed 3.0Gb/s throughputs.

 

[carambo]

SATA connectors used in external enclosures are just electrical contacts (wire), not active circuits.

So it will pass 1.5Gb/s, 3.0Gb/s, or 6.0Gb/s, depending on the slowest link in the chain (drive or SATA controller it's attached to). But if both the disk and card are capable of negotiating 6.0Mb/s, that's what they'll connect at.

Keep in mind, with 6.0Gb/s, mechanical disks cannot come close to saturating it (can't even saturate 3.0Gb/s), so it's really suited to recent SSD's which can exceed 3.0Gb/s throughputs.

Ok, understood, thanks for your help

 

[nanofrog]

Ok, understood, thanks for your help

NP. Glad it helped.