suspekt Posted February 11, 2006 Posted February 11, 2006 These links are _very_ old :shake: . But since Windows XP is built on the same foundation as NT, the basics are the same... http://arstechnica.com/tweak/nt/IO-1.html http://arstechnica.com/tweak/nt/cache.html http://arstechnica.com/tweak/nt/disable_execpage-1.html Share this post Link to post Share on other sites More sharing options...
ripken204 Posted February 13, 2006 Posted February 13, 2006 SATA Spread Spectrum - what should i set this to? i've read in here that is may increase stability. so should i enable it? Share this post Link to post Share on other sites More sharing options...
gnrlbzik Posted February 13, 2006 Posted February 13, 2006 It might been already disscussed, but just maybe some one can pm me on this, my SCSI drive is my primary drive on which i run windows, and when i benchmark it gives me very bad results, like only 80 megs when it suppose to be a 160, is there a bootable version of any benchmark available, so that there is no stress on hd, so that i can test it accurately. thank you. Share this post Link to post Share on other sites More sharing options...
suspekt Posted February 13, 2006 Posted February 13, 2006 Even if the interface is Ultra320, it doesn't say anything about how fast the drive itself is. Your Cheetah in your sig is a Ultra320 drive, and I presume you have a Ultra320 compliant SCSI controller so that would let the harddrive communicate with your controller according to the Ultra320 SCSI standard. Even if the drive and controller are speaking to eachother according to the Ultra320 spec it doesn't say that the drive itself (physically, the mechanics...) is capable of acheiving the maximum bandwith Ultra320 offers. The advantage of a Ultra160 or Ultra320 interface drive (over older type SCSI drives), is that when you use them together (2, 3 or more drives), indiviually or in RAID, you'll have a interface that is fast enough to deliver all the drives maximum data rate at the same time. So if your single drive maxes out at 80mb/s, then 2 drives used at the same time would theoretically speaking need a 160mb/s capable interface... Hope this explanation helps As to which SCSI standard gives what Mb/s speed, I can't help you - since there is everything from SCSI-I, SCSI-II, Fast SCSI, Ultra SCSI, Ultra Wide SCSI, Ultra2, Ultra3, SCSI-III etc etc etc... maybe something else I don't remember. Just looking at my pdf manual for my Tekram DC-390U2W SCSI controller (many years old) - I can give you these figures: Wide Ultra2 SCSI---80 MB/s---15 devices/max Ultra Wide SCSI----40 MB/s---15 devices/max Ultra SCSI---------20 MB/s----7 devices/max Share this post Link to post Share on other sites More sharing options...
Guest Modulok Posted February 14, 2006 Posted February 14, 2006 SATA Spread Spectrum - what should i set this to? i've read in here that is may increase stability. so should i enable it? from what I read on google, you should enable it for protection against EMI, same with pci-e spread spectrum. Most threads on this Ive read it is disabled. Share this post Link to post Share on other sites More sharing options...
gnrlbzik Posted February 14, 2006 Posted February 14, 2006 coolio, thank you : ) although i am stil more then happy with my SCSI, it been the mean machine : ) Even if the interface is Ultra320, it doesn't say anything about how fast the drive itself is. Your Cheetah in your sig is a Ultra320 drive, and I presume you have a Ultra320 compliant SCSI controller so that would let the harddrive communicate with your controller according to the Ultra320 SCSI standard. Even if the drive and controller are speaking to eachother according to the Ultra320 spec it doesn't say that the drive itself (physically, the mechanics...) is capable of acheiving the maximum bandwith Ultra320 offers. The advantage of a Ultra160 or Ultra320 interface drive (over older type SCSI drives), is that when you use them together (2, 3 or more drives), indiviually or in RAID, you'll have a interface that is fast enough to deliver all the drives maximum data rate at the same time. So if your single drive maxes out at 80mb/s, then 2 drives used at the same time would theoretically speaking need a 160mb/s capable interface... Hope this explanation helps As to which SCSI standard gives what Mb/s speed, I can't help you - since there is everything from SCSI-I, SCSI-II, Fast SCSI, Ultra SCSI, Ultra Wide SCSI, Ultra2, Ultra3, SCSI-III etc etc etc... maybe something else I don't remember. Just looking at my pdf manual for my Tekram DC-390U2W SCSI controller (many years old) - I can give you these figures: Wide Ultra2 SCSI---80 MB/s---15 devices/max Ultra Wide SCSI----40 MB/s---15 devices/max Ultra SCSI---------20 MB/s----7 devices/max Share this post Link to post Share on other sites More sharing options...
suspekt Posted February 16, 2006 Posted February 16, 2006 So can we see a ATTO run of that SCSI drive? There's alot of people out there with a SCSI fetish u know hehe Share this post Link to post Share on other sites More sharing options...
Andy_A Posted February 21, 2006 Posted February 21, 2006 For those who're interested; here's a hdtach comparison before and after sata2 is enabled on my rig. This is a standalone before and after comparison, and not to be compared with other benchmarks. http://www.thompsonstv.com/pix/HdTachsata1-2compare.jpg Share this post Link to post Share on other sites More sharing options...
Wetchaser Posted February 22, 2006 Posted February 22, 2006 Is burst a usable thing i guess is my first question? Share this post Link to post Share on other sites More sharing options...
red930 Posted February 22, 2006 Posted February 22, 2006 Is burst a usable thing i guess is my first question? Yes, burst bandwidth is valid and usable. Burst speed is the measure of bandwidth between the controller and the drive cache. This is outside the mechanical limitations of the drive its self. Now we are talking about the limited size of the cache whether it be 8MB or 16MB but since the drive will read ahead to fetch the next chunk of data it will get to the controller only as fast as the interface will allow. More is better every day of the week when we're talking bandwidth. Even just a little chunk. Share this post Link to post Share on other sites More sharing options...
red930 Posted February 22, 2006 Posted February 22, 2006 Share this post Link to post Share on other sites More sharing options...
red930 Posted February 22, 2006 Posted February 22, 2006 Share this post Link to post Share on other sites More sharing options...
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