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#1
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P4C800E Deluxe Intel SATA RAID vs. Promise SATA RAID
I keep seeing this question asked, but have not seen data from persons
who have tried both. I have 2 SATA Maxtor 80GB drives on the Promise controller running RAID 0. MoBo BIOS is 1014. They run fine, but people tell me to try the ICH5R and IAA as it is not on the PCI bus and will run better. My question is...has anyone confirmed this? Most say to use ICH5R as it has to be better but have not tried the Promise. I guess I have the problem the other way around...I am on Promise and wonder about the ICH5R. TIA |
#2
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mpsan wrote:
I keep seeing this question asked, but have not seen data from persons who have tried both. I have 2 SATA Maxtor 80GB drives on the Promise controller running RAID 0. MoBo BIOS is 1014. They run fine, but people tell me to try the ICH5R and IAA as it is not on the PCI bus and will run better. My question is...has anyone confirmed this? Most say to use ICH5R as it has to be better but have not tried the Promise. I guess I have the problem the other way around...I am on Promise and wonder about the ICH5R. I am using the ICH5R (two WD Raptors as Raid0), and I am quite happy with it. No, I have not tried the Promise Simply have a look at the numbers: Your SATA Maxtor drives have, depending on the exact type, a max transfer rate of about 55-60 MB/s. Take that x2 for Raid0, and you end up at about 110-120 MB/s theoretical maximum transfer rate under optimum conditions. The PCI bus is limited to 133MB/s. It is used by all the other components you have there - e.g. sound card, maybe you have a video editing card there, maybe you're using some other network card than the onboard CSA controller (e.g. wireless LAN), etc. etc. If you do not have ANY extra PCI card in use and if you use the onboard LAN, the Promise controller is OK, because the PCI bandwidth is no bottleneck for it. But IF you use other PCI cards, you're limiting the controller transfer rate to whatever is left after you subtract what all the other cards use up from the 133MB/s limit. One other things to remember is that I have heard (i.e. I have not experimented around myself) that the Intel controller has a lower CPU usage than the Promise one. To sum up: You probably won't notice much of a difference unless you have one or more bandwidth hungry PCI cards in your system. If you haven't, leave everything as it is - but if you ever reinstall your system, try the Intel controller. |
#3
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Heres a review of some southbridge raid controllers.
http://www.tbreak.com/reviews/article.php?id=291 |
#4
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Nice link. Pretty much the same benchmark I have in my p4p800, although I
don't use raid, only single sata. I can testify that the cpu taxation of the ich5r on sata is only 2%, I recently got that result using hd tach, while the pata had 1%, so they perform basically the same since this difference falls between the test's measurement error. -- "Pole Dome Guitar Religion" "Courseyauto" wrote in message ... Heres a review of some southbridge raid controllers. http://www.tbreak.com/reviews/article.php?id=291 |
#5
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Thank you Bob.
I have a dvd-ROM on Primary Master and a LiteON CD-RW on Secondary Master. Is it true that with the ICH5R you loose the Secondary onboard IDE Port? That would make my CD-RW go away. Bob Millers wrote in news:c75936$ig8ul$1@ID- 202456.news.uni-berlin.de: mpsan wrote: I keep seeing this question asked, but have not seen data from persons who have tried both. I have 2 SATA Maxtor 80GB drives on the Promise controller running RAID 0. MoBo BIOS is 1014. They run fine, but people tell me to try the ICH5R and IAA as it is not on the PCI bus and will run better. My question is...has anyone confirmed this? Most say to use ICH5R as it has to be better but have not tried the Promise. I guess I have the problem the other way around...I am on Promise and wonder about the ICH5R. I am using the ICH5R (two WD Raptors as Raid0), and I am quite happy with it. No, I have not tried the Promise Simply have a look at the numbers: Your SATA Maxtor drives have, depending on the exact type, a max transfer rate of about 55-60 MB/s. Take that x2 for Raid0, and you end up at about 110-120 MB/s theoretical maximum transfer rate under optimum conditions. The PCI bus is limited to 133MB/s. It is used by all the other components you have there - e.g. sound card, maybe you have a video editing card there, maybe you're using some other network card than the onboard CSA controller (e.g. wireless LAN), etc. etc. If you do not have ANY extra PCI card in use and if you use the onboard LAN, the Promise controller is OK, because the PCI bandwidth is no bottleneck for it. But IF you use other PCI cards, you're limiting the controller transfer rate to whatever is left after you subtract what all the other cards use up from the 133MB/s limit. One other things to remember is that I have heard (i.e. I have not experimented around myself) that the Intel controller has a lower CPU usage than the Promise one. To sum up: You probably won't notice much of a difference unless you have one or more bandwidth hungry PCI cards in your system. If you haven't, leave everything as it is - but if you ever reinstall your system, try the Intel controller. |
#7
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You will loose one ide port if you use sata & win9x or winnt. Not the case
on w2k/xp, on which you'll be able to use both ide channels & sata together -- "Pole Dome Guitar Religion" "Dave" wrote in message . 227.77... Thank you Bob. I have a dvd-ROM on Primary Master and a LiteON CD-RW on Secondary Master. Is it true that with the ICH5R you loose the Secondary onboard IDE Port? That would make my CD-RW go away. |
#8
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Yup, saw that in the manual...May try to put RAID0 on ICH5R. I have a
64k stripe size now on the Promise. "pedro itriago" wrote in : You will loose one ide port if you use sata & win9x or winnt. Not the case on w2k/xp, on which you'll be able to use both ide channels & sata together -- "Pole Dome Guitar Religion" "Dave" wrote in message . 227.77... Thank you Bob. I have a dvd-ROM on Primary Master and a LiteON CD-RW on Secondary Master. Is it true that with the ICH5R you loose the Secondary onboard IDE Port? That would make my CD-RW go away. |
#9
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Yup, saw that in the manual...May try to put RAID0 on ICH5R. I have a 64k stripe size now on the Promise. "pedro itriago" wrote in : You will loose one ide port if you use sata & win9x or winnt. Not the case on w2k/xp, on which you'll be able to use both ide channels & sata together -- "Pole Dome Guitar Religion" "Dave" wrote in message . 227.77... Thank you Bob. I have a dvd-ROM on Primary Master and a LiteON CD-RW on Secondary Master. Is it true that with the ICH5R you loose the Secondary onboard IDE Port? That would make my CD-RW go away. You dont have to use raid on the sata,but you do have to use a raid driver for the sata drive to be recognized. If you want only one sata drive on the ICH5R controller,you dont have to create a raid array but you do have to hit F6 when installing the OS and install the raid driver. If you do it like that you will still have use of all your IDE ports. DOUG |
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