WinXP SP2 How much lower would it be if I hard drive DMA transfer mode to PIO? [ultra dma mode 2] [ultra dma mode]
Q: From this thread (http:// ($ MySite) / messageview.aspx? Catid = 34 u0026amp; threadid = 1475967 u0026amp; highlig ht_key = y)
It seems my hard drive using Ultra DMA mode 4 causes reboot my boot.
if no i dont have the CD-ROM as slave, hard drive only uses Ultra DMA Mode 2. when I use the CD-ROM, it goes up to Ultra DMA Mode CD-ROM 4.
i cannot switch to the secondary IDE channel because it is full. (2nd hd + CD writer)
so as my primary hard drive to switch to Pio, how could that much slower than Ultra DMA 2?
THX!
Re:You definitely need 80-wire cables for Ultra DMA 4 and up.
Re:Text (http://www.storagereview.com/guide2000/ref/hdd/if/ide/modesUDMA.html)
Mode 2 == ATA/33
Mode 4 == ATA/66
Re:ah… went into bios and manually set the dma mode to 2.
now in winxp, set the hd ti dma, and it found dma mode 2, instead of mode 4.
rebooted (warm + cold) several time. no problem.
i think the problem is that i need 80pin cables for dma mode 4. (i only have 40 pin)
how much slower is dma 2 over dma 4?
Re:Get an Ultra ATA-100 controller card, and put your hard drives on that. Then you have one drive per channel.
Re:IMHO using PIO transfer mode on the primary drive is going to make you a whole lot less happy than putting both the CD drive and the CD writer on the same IDE channel. Unless this system is pretty slow, putting the two optical drives on the secondary just isn't likely to affect CD copying all that badly. I've faced this same set of choices on several different machines, and placing both optical drives on the secondary has given the best results for every system since the 500 MHz PIII level. I do on-the-fly CD copying all the time with an old 1.4 GHz P4 with never a hitch.
Re:PIO is significantly slower and even worse, devices in PIO mode are a drain on CPU resources.
Re:i'll be doing cd to cd copying. i'm also going to burn from hd to cd.
thats why the hd + regular cdrom drive is on the primary ide channel, and the burner is on the secondary channel. (i'm also going to use the burner to install files.)
that way, no matter what i do, the source of the data and the receiver are on different ide channels.
but i'm not going to be doing that often.
exactly how much slower is PIO than DMA?
Re:Are you doing disc-to-disc copies?
Try putting same-speed drives on same-speed channels. Won't be good for disc-to-disc copying, but it'll be better than slow PIO.
Re:Yeah, why would you need a regular CD-ROM drive if you already have a CD burner? Burners read CDs too you know…
Re:Nothing wrong with having both HDs on the primary channel unless you constantly do drive-to-drive transfers.
Why do you even need a CD-ROM drive anymore?
Re:It would be noticeably slower. You definitely want to use DMA. Why not
1. Buy a new CD-ROM drive (should be less than $20), or
2. Move your existing CD-ROM to a different IDE channel.
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Tags: ultra dma mode, ultra dma mode 2