View Full Version : Sata.. questions maxtor 160 gig
I have a maxtor 160 gig sata installed in my system. It should support 150 mb burst rates. I just ran HD Tune and average was about 50 with burst of 91, and the info section siad ultra ata/133 supported. why is it not bieng detected as 150mb?
Helsyeah
11-19-04, 09:27 PM
the 150 mb rate is theortical of the sata bus speed. From what i gather, the limitation is the hard drive its self thus resulting in less than theortical bursts and trasfer rates. I think that this is why the WD raptors are faster than most other sata drives. They have a higher spindle speed @ 10k and thus the drive accesses data faster and can use more of the 150 mb of bandwidth available...
Now these are just purely logical reasoning from what little information that i remember right this second... google would provide you a much more complete and detaild explanation im sure :D
the 150 mb rate is theortical of the sata bus speed. From what i gather, the limitation is the hard drive its self thus resulting in less than theortical bursts and trasfer rates. I think that this is why the WD raptors are faster than most other sata drives. They have a higher spindle speed @ 10k and thus the drive accesses data faster and can use more of the 150 mb of bandwidth available...
Now these are just purely logical reasoning from what little information that i remember right this second... google would provide you a much more complete and detaild explanation im sure :D
well i understand that the 150 is "burst" speed and not likely to happen, especially with maxtor, but in the info screen of HD Tune, it reads as only supporting ata/133, not the 150 it is supposed to support. I should at least be getting better performance than an IDE drive.
Helsyeah
11-20-04, 03:24 AM
ahh, unless this has been ruled out, i would suspect that HD Tune is reading incorrectly, and wouldnt worry overly much. As far as i know, there is no way to have a sata drive run in an ata133 setup, either by emulation, or not...
ahh, unless this has been ruled out, i would suspect that HD Tune is reading incorrectly, and wouldnt worry overly much. As far as i know, there is no way to have a sata drive run in an ata133 setup, either by emulation, or not...
I have seen some sata drives that run at 133, or maybe not... i thought i did.heh
Ill try a different tester.. thanks!
O.K. Ran HD Tach and got burst of 115 and an avg of 48.9 sequential read..
not too hot...
why might that be?
Does the program support SATA? Perhaps it just reads it as ATA133 because SATA is not supported.
150mb/s is only theoretical and most drives will rarely come close to hitting this limit. Other factors can affect hard disk speed as well, including:
Other drives on the channel/adaptor
Size of files being read
Fragmentation - tried defragging?
DanIdentity
11-22-04, 08:38 AM
I should at least be getting better performance than an IDE drive.
Current SATA drives are no faster than IDE drives. The SATA bus has the potential to be faster, but no current hard drive, SATA or IDE, comes close to fully saturating its bus. In fact, your SATA drive is more than likely an IDE drive with a bridge chip to make it SATA.
Does the program support SATA? Perhaps it just reads it as ATA133 because SATA is not supported.
150mb/s is only theoretical and most drives will rarely come close to hitting this limit. Other factors can affect hard disk speed as well, including:
Other drives on the channel/adaptor
Size of files being read
Fragmentation - tried defragging?
O.K., HD tach says it supports sata. its a fresh install of the os and everything else on there, no more than 3 days old. I will defrag to be sure as well.
It's the only HD I have running, nothing else on sata controller
dark_15
11-22-04, 09:20 PM
and if it's an integrated SATA controller on the motherboard, it will only have the transfer speed of ATA133...
In fact, your SATA drive is more than likely an IDE drive with a bridge chip to make it SATA.
:thup:
and if it's an integrated SATA controller on the motherboard, it will only have the transfer speed of ATA133...
why's that? define integrated...
dark_15
11-23-04, 01:12 PM
I meant built into the motherboard...
Some Examples:
http://www.siimage.com/documents/SiI-PB-0023.pdf
http://www.siimage.com/documents/SiI3114_PB_090103.pdf
Since they go through the PCI-Bus...
At 33 MHz, a 32-bit slot supports a maximum data transfer rate of 132 MBytes/sec, and a 64-bit slot supports 264 MBytes/sec.
http://www.techfest.com/hardware/bus/pci.htm#3.0
you would need a PCI-X slot and PCI-X controller in order to get your data to exceed the 133 MBytes/sec...
(Hopefully the Maha-Geek Master from where I come from didn't steer me wrong...)
Integrated SATA means the controller is integrated onto the board itself, either built in to the south bridge of the chipset or as a chip on its own. I think dark15 is right - the 32 bit 33MHz PCI bus has a theoretical (again, few devices would reach this peak) maximum of 133Megabytes per second, ie:
32 bits at a time, 33,333,333 times per second = ~126MB/s unless my calculator is goofed.
dark_15
11-23-04, 02:27 PM
You're right... I thought that quote was incorrect... I knew it was somewhere around the 125-130 range...
I just was trying to get to the point that you cannot really hit the 150 mbps with the integrated or 32 bit PCI solutions
vBulletin® v3.8.7, Copyright ©2000-2012, vBulletin Solutions, Inc.