Re: PCIe SATA controller
Date: Sat, 06 Dec 2014 12:21:23 +1100 From: Rohan McLeod <rhn@jeack.com.au> To: LUV Main <luv-main@luv.asn.au> Subject: Re: PCIe SATA controller Message-ID: <54825A13.3040101@jeack.com.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Tim Hamilton wrote:
[1] http://www.pccasegear.com/index.php?main_page=index&cPath=210_385
I notice all these controllers are SATA III. When I was struggling to understand why my new 4TB HGST_HDN7240_40ALE_640 SATA III HD ; couldn't seem to deliver a much higher data transfer rate on SATA III than on SATA II.; one comment which was illuminating to me was; " there is no such thing as a SATA III rotating hard-drive" which I took to mean as : ' there is no rotating harddrive; whose heads can transfer data on/off the disk; at anything like 6Gb/s ~ 600GB/s' (SATA III max)'. in contrast to say a SATA III SSD, where this is quite possible ! Apologies if this is merely repeating old news !
regards Rohan McLeod
Indeed, I was using new cards as a reference point to begin trying to understand what was available. That said, I don't see an abundance of new or used SATA II cards available on places like eBay either.
Tim Hamilton wrote:
Date: Sat, 06 Dec 2014 12:21:23 +1100 From: Rohan McLeod <rhn@jeack.com.au <mailto:rhn@jeack.com.au>> To: LUV Main <luv-main@luv.asn.au <mailto:luv-main@luv.asn.au>> Subject: Re: PCIe SATA controller Message-ID: <54825A13.3040101@jeack.com.au <mailto:54825A13.3040101@jeack.com.au>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Tim Hamilton wrote: > > [1] http://www.pccasegear.com/index.php?main_page=index&cPath=210_385
I notice all these controllers are SATA III. When I was struggling to understand why my new 4TB HGST_HDN7240_40ALE_640 SATA III HD ; couldn't seem to deliver a much higher data transfer rate on SATA III than on SATA II.; one comment which was illuminating to me was; " there is no such thing as a SATA III rotating hard-drive" which I took to mean as : ' there is no rotating harddrive; whose heads can transfer data on/off the disk; at anything like 6Gb/s ~ 600GB/s' (SATA III max)'. in contrast to say a SATA III SSD, where this is quite possible ! Apologies if this is merely repeating old news !
regards Rohan McLeod
Indeed, I was using new cards as a reference point to begin trying to understand what was available.
That said, I don't see an abundance of new or used SATA II cards available on places like eBay either.
Tim perhaps this should be on luv-talk ? For me the consequence wasn't to look for SATA II cards; since I already had an abundance of SATA II ports on the M/B [Asus M-M4A79XTD_EVO; 16GB RAM; AMD Phenom II x4 965 3.4GHz] but to start replacing every rotating SATA drive except the 4TB drive with SSD's Thus far, as boot drives: 1/ a 120GB SATA III Intel 530 SSDSC2BW12OA401 from MSY $88; not sure it always delivers 540 MB/s read and 490 MB/s as per Intel specs: http://www.intel.com/content/www/us/en/solid-state-drives/solid-state-drives... but it seems quick. 2/ likewise not sure the 128GB PCIe Plextor_M6e_PCI-Express_SSD $200 Scorpion Tech; always delivers 770MB/s read and 335MB/s write; as per http://www.tomshardware.com/reviews/plextor-m6e-pci-express-ssd,3763.html but it also seems quick; (.but with more limited boot support on' that other OS';) current project is to see if I can get a XPx64 VM running on Qubes; then boot Qubes off this Plextor drive regards Rohan McLeod
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Tim Hamilton