Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Non-*NIX Forums > General
User Name
General This forum is for non-technical general discussion which can include both Linux and non-Linux topics. Have fun!


  Search this Thread
Old 02-16-2003, 12:57 PM   #1
Registered: Aug 2002
Posts: 105

Rep: Reputation: 15
Second Hard Drive IDE vs SCSI

I am thinking of installing a second hard drive on my pc. I only have a single scsi hard drive in right now but am thinking of adding an ide hard drive as my slave. Can this be done or do I have to get another scsi hard drive and make that my slave? Do any of you know any good websites or message boards I could go to to get this type of information?

Old 02-16-2003, 01:31 PM   #2
Registered: Sep 2002
Location: Redding, CA
Distribution: SuSE
Posts: 253

Rep: Reputation: 30
Im pretty sure it needs to be both SCSI or both IDE. The reasoning behind my answer is the actual wire size differences. The SCSI wire is bigger than ide so i can't see how you would hook the ide up as slave. ::
Old 02-16-2003, 05:36 PM   #3
Registered: Feb 2003
Location: Over the hills and far away
Distribution: Mandrake 9.0
Posts: 122

Rep: Reputation: 15
By default your motherboard should have at least two EIDE bus sockets built in on it. If you want an IDE drive, make sure it is master and then plug it into on of the EIDE sockets using an EIDE cable. If you have a CD-ROM, Zip Drive, DVD-ROM, etc plugged into one EIDE socket then use a spare socket if you have one, otherwise the performance will be alot slower. You may need a new EIDE cable if you dont have one spare.

Out of interest is your SCSI bus socket on a card (eg PCI) or is it built into your motherboard?
Old 02-17-2003, 04:32 AM   #4
Senior Member
Registered: Jan 2003
Location: Portland, OR USA
Distribution: Slackware, SLAX, Gentoo, RH/Fedora
Posts: 1,024

Rep: Reputation: 45
Uh if you have a SCSI drive now then there is no slave to add, a new ide device will be the master on the *different* IDE bus.

ide <> scsi.

ide = onboard with any motherboard newer than pentium 1. 2 channels, each channel takes one master and one slave. aka ATA, DMA, UDMA, DMA33, DMA66, DMA100, DMA133, DMA166, IDE, EIDE.

scsi = onboard with a few motherboards, add in PCI for almost everyone else. Single ended SCSI can add 7 devices, double ended can add 15 devices. There is no slave/master but rather a SCSI ID, usually 0-7 or 0-15 with the controller itself being ID 7. SCSI is usually measured in a mix of speed and cable type such as 50pin SCSI-2 or 68pin UW-SCSI, etc.
Old 02-17-2003, 11:19 AM   #5
Registered: Feb 2003
Distribution: Fedora 13
Posts: 92

Rep: Reputation: 15
If you have SCSI already, go with it. A little faster, and easier to deal with over IDE. It is a little pricier over IDE though. Darin did pretty well explaining it already, but I will add that if you want to add an IDE drive, there is no problem mixing the types. I do that already in my system.
Old 02-19-2003, 07:34 AM   #6
Registered: Feb 2003
Location: London
Distribution: Fedora 22
Posts: 59

Rep: Reputation: 15
Unhappy It depends on the use

This is an ongoing debate among several circles on which is best. There is no answer unless you state the use for it. Let's see :

IDE - omnipresent, very supported, cheap, unsuited for stressful ends, CPU-hog

SCSI - independent system (your CPU load is always low during access), expensive, slightly less supported, expensive, robust

Don't run medium or large scale email or web or news servers based on an IDE-raid. You're asking for trouble. They are not designed for it and they are not adequate. IBM tried to make it more adequate for heavy use with command queueing, but it never took off.

If all you want is home use, go for IDE.
Old 01-17-2006, 03:31 AM   #7
LQ Newbie
Registered: Jan 2006
Posts: 1

Rep: Reputation: 0
how do I add a new eide hard drive to a scsi system? keeping my current scsi hard-drive as the the boot drive? can any body help?
Old 01-17-2006, 08:23 AM   #8
Brian Knoblauch
Registered: Jan 2005
Distribution: OpenSuse Tumbleweed
Posts: 288

Rep: Reputation: 39
Originally Posted by beepay
how do I add a new eide hard drive to a scsi system? keeping my current scsi hard-drive as the the boot drive? can any body help?
Depends on your BIOS. Most newer BIOS have the option to select SCSI/other as the boot drive. Some older ones can be fooled by telling them that no IDE drives are installed (let the OS find it)...


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
GRUB or LILO boot to SCSI drive on SCSI system w/ IDE card mkl838 Linux - General 1 03-06-2005 10:01 PM
How to config ide-scsi on hard drive david_deng Red Hat 2 09-14-2004 07:07 PM
Hard disk + IDE-SCSI palanisaravanan Linux - Hardware 4 04-21-2004 12:05 PM
IDE-SCSI drive problem geoff-taylor@ho Linux - Hardware 7 08-20-2002 06:13 AM
identifying controller type of given hard drive (scsi or ide) maros Programming 1 08-24-2001 11:51 PM > Forums > Non-*NIX Forums > General

All times are GMT -5. The time now is 04:58 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration