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Do HDs sharing an IDE cable run slower?

By mguerreiro ·
I am adding another hard disc to my system. While I have available IDE connectors on my motherboard, I am tempted to install the new drive as a "slave" to share the IDE cable with the existing drive in order to reduce case clutter and improve air flow. My question is, will two drives sharing an IDE cable run more slowly than the same drives installed as "masters" with their own separate cables?

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Do HDs sharing an IDE cable run slower?

by opatzg In reply to Do HDs sharing an IDE cab ...

Yes, but you probably won't notice it unless you copy large amounts of data from one disc to the other or if you have a lot of processes running in the backround on both drives.
The slow down will be offset by caching from the drives as well as caching in memory. So i wouldn't sweat it. If it's better with less stress wiring wise I'ld go that route since the last thing you need is a stretched cable undoing itself while your trying to use your drive.

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Do HDs sharing an IDE cable run slower?

by mguerreiro In reply to Do HDs sharing an IDE cab ...

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Do HDs sharing an IDE cable run slower?

by dmiles In reply to Do HDs sharing an IDE cab ...

There will be a number of things that will determine the processing speed of the drive to be considered.
The drive speed,7200 compared to 5400
Amount of memory in system
The data bus speed
Processor speed will also be a factor
Iam not sure that adding a secdond hard drive will improve air flow,consider adding a second case fan to increase air flow in system

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Do HDs sharing an IDE cable run slower?

by mguerreiro In reply to Do HDs sharing an IDE cab ...

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Do HDs sharing an IDE cable run slower?

by Ann777 In reply to Do HDs sharing an IDE cab ...

Yes it will be slower. Read this:

http://www.howstuffworks.com/ide4.htm

"To allow for two drives on the same cable, IDE uses a special configuration called master and slave. This configuration allows one drive's controller to tell the otherdrive when it can transfer data to or from the computer. What happens is the slave drive makes a request to the master drive, which checks to see if it is currently communicating with the computer. If the master drive is idle, it tells the slave drive to go ahead. If the master drive is communicating with the computer, it tells the slave drive to wait and then informs it when it can go ahead."

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Do HDs sharing an IDE cable run slower?

by mguerreiro In reply to Do HDs sharing an IDE cab ...

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Do HDs sharing an IDE cable run slower?

by reieev In reply to Do HDs sharing an IDE cab ...

Here is the list of fastest-to-slowest 2 channel IDE configuration:
1. Primary Master
2. Secondary Master
3. Primary Slave
4. Secondary Master.
If you have extra IDE channels available go for One Device per channel configuration, in which case set them all to master. To reduce cable clutter in the case consider round IDE and Floppy cables wich go for around $7 at http://www.newegg.com/app/listProduct.asp?submit=list&catalog=317&DEPA=1&sortby=11&order=0

To take the full advantage of two HDD configuration consider the following:
1. Place OS on the fastest drive (not only rpm, but average read time)
2. Place swap file on other drive only when it's master on other channel and same or higher speed.
3. Use something like Norton Utilities to optimize swap file as well as system files to be placed on outer tracks of the disk.

Majority of hard drives tend to drop in performance once filled over 50% (due to placing files on inner tracks). Consider to keep your system HDD relatevely clean.

Hope, that helps.

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Do HDs sharing an IDE cable run slower?

by mguerreiro In reply to Do HDs sharing an IDE cab ...

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Do HDs sharing an IDE cable run slower?

by TheChas In reply to Do HDs sharing an IDE cab ...

The real answer, depends on how you use the drives.

If both drives are on the same IDE channel, file transfers from drive to drive will take nearly 2X what they would take if the drives are on different channels.

Also, some IDE busses default to the transfer speed of the slowest IDE device on the channel.
So, if you mix an ATA 133 drive with a UDMA33 drive, the transfer rate may drop to UDMA33 for both drives.

Here's how I have my system setup.
2 hard drives on On-board RAID controller primary.
1 hot swap bay on secondary channel.
CD-ROM as slave on Primary "normal" IDE.
DVD and CD-RW drives on secondary IDE channel.

Depending on the age of your motherboard, you may benmefit from adding a PCI IDE controller card for your hard drives.
If the new drive is ATA100 or ATA133, and your motherboard is ATA66, then you will benefit from the $30 investment.

Chas

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Do HDs sharing an IDE cable run slower?

by mguerreiro In reply to Do HDs sharing an IDE cab ...

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