Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
Performance of IDE master/slave, etc?
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware
View previous topic :: View next topic  
Author Message
n0n
Guru
Guru


Joined: 13 Jun 2002
Posts: 355

PostPosted: Fri Aug 02, 2002 3:25 pm    Post subject: Performance of IDE master/slave, etc? Reply with quote

Hey, I've been messing around with my box lately, and I've had a recurring question of mine pop back into my head, which I've never been able to find a definitive answer to. Basically, what's the most efficient way to put drives on IDE controllers so that you get the max throughput? I'm assuming that drives in the "slave" position are probably less efficient than those in the "master," or is that wrong? If I have to regularly copy data from one hard drive to another, does it make more sense to have them be master/slave, or is it better to have them both be masters on different IDE busses? I've got a PCI card which gives me two more IDE busses, is that going to be faster or slower than the two that are on my mainboard?

You could probably come up with some more questions yourself, but basically that's what I've been wondering for some time. I know that I could just buckle down and benchmark some of this stuff myself, but I'm sure that it's been done before. Google's been somewhat unhelpful because the search terms are generally so widespread. Anyone have a link or two? Thanks!
Back to top
View user's profile Send private message
BonezTheGoon
Bodhisattva
Bodhisattva


Joined: 14 Jun 2002
Posts: 1375
Location: Albuquerque, NM -- birthplace of Microsoft and Gentoo

PostPosted: Fri Aug 02, 2002 6:15 pm    Post subject: Reply with quote

Copying data (large amounts) will be better across channels instead of in one channel. The reason being that the Master drive controls the channel and directs the traffic for both the drives when they are on the same channel. If you have two hard drives, each a master on their own channel, they can control themselves and therefore work better. At one point I had my CD-RW as Master and my DVD as slave (same channel) and Nero [yes yes this was back when I used M$ Win2k] reported that it could not copy data straight from the DVD-ROM to the CD-RW given they were on the same channel, copying the data first to the hard disk on the other channel was necessary. Having an external controller that allows all your devices to be Master is a nice feature. A slave device does not always have poor performance though, if your master device is otherwise idle your slave device feels no performance hit (in my experience.) So it greatly depends on what hardware you have where and how you are using it! If you have two hard disks and one CD-RW I would suggest you have your hard disks both be masters and then have your CD-RW as slave on the second channel. Then I would generally try to always burn data from the other channel, ie /dev/hda.

Most of what I said though should probably be considered opinion given there are surely other considerations in different settings that give varied results. I think that this pretty much sums it up for the majority of the time though.

Regards,
BonezTheGoon
Back to top
View user's profile Send private message
broody
n00b
n00b


Joined: 17 Jun 2002
Posts: 10
Location: DC Metro, USA

PostPosted: Fri Aug 02, 2002 6:31 pm    Post subject: Reply with quote

Your best bet is to go over the FAQ, specificly this section.
_________________
~~ Whatever it takes.
Back to top
View user's profile Send private message
n0n
Guru
Guru


Joined: 13 Jun 2002
Posts: 355

PostPosted: Fri Aug 02, 2002 7:18 pm    Post subject: Reply with quote

BonezTheGoon: Thanks for the input!

broody: That link is fantastic, thanks!
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum