Raid 0+1 help

BaP · 08-07-2005, 02:52 PM

Is it possible to have a raid 0+1 array set up using two sata drives and two ide drives?? I would like the sata to be the stripe and the ide's the mirror. I have a asus P4C800 deluxe with 1gb of dual channel memory. I would like the sata's to be the boot drives as well. Thanks

**linderman** · 08-07-2005, 05:50 PM

Welcome to TSF:

Until one of our experienced raid staff can answer your question directly I suggest you review the raid info posted by Blackduck / you can find a wealth of info in the listed title of "Tweakers" (located lower in the list than motherboards & hard drives )then trouble shooting tips located at the very top of page within the Tweakers title

please keep an eye on your post here someone will get to it very soon !!

regards

joe

BaP · 08-07-2005, 06:04 PM

Thanks joe....ahhh I can't see a "Tweakers" any where?? :(

**linderman** · 08-07-2005, 08:05 PM

sorry i should have done this the first time
http://www.techsupportforum.com/hardware-support/tweakers/troubleshooting-tips-tricks/

BaP · 08-08-2005, 05:39 PM

Ooops,

Quote:

BaP, you do not have permission to access this page. This could be due to one of several reasons:

Thanks anyways.

**linderman** · 08-08-2005, 06:19 PM

Dang: I'm not doing so good :( Soooory didnt know that location was restricted access ?????

try this

let me know which raid controller you will be using and I will post a manual specific to your controller / courtsey of Blackduck !!

regards

joe

**linderman** · 08-08-2005, 06:26 PM

another decent one

**linderman** · 08-08-2005, 06:28 PM

this one looks promising

http://www.pcguide.com/ref/hdd/perf/...f/index-c.html

joe

BaP · 08-08-2005, 06:44 PM

Thanks, got some reading to do but, I don't think it will answer my ? as can you mix sata and ide drives and get the benefits of raid 0+1? Thank you for what you have posted this is great.

**linderman** · 08-08-2005, 06:53 PM

Well I hope you will pardon by ignorance, but perhaps we can learn together / I am under the impression that raid 0 is simply a drive acting alone & operating alone ???? and raid 1 = mirrored those I KNOW must be drives exactly the same size, model, speed, etc (twins if you will) I can see no logical reason why you couldnt have disimilar drives in a raid 0 +1 as long as the +1 set are identical twins ?????

what is your understanding ???

hopefully Blackduck or one of the other fellas thats done this will pop in here soon they have gords of raid experience

regards

joe

BaP · 08-09-2005, 07:39 PM

What I have is two Maxtor 40gig drives in a mirrored array now, I also have two WD 36gig 10000 rpm sata drives that I want to use because my current raid 1 is kinda slow, because I have all these drives I was wondering what would be possible to put them to use?? The idea of using the sata's as a raid 0 for the speed with the Maxtor as the mirror sounds like the best of both worlds, but is it possible and how is it done?? My ASUS P4C800-E Deluxe MB has a Promise PDC20378 controller chipset that allows multi-raid configs but, I am not knowledgeable (had to get the dictionary for that word) as to how to go about doing it. Need to be lead by the hand :) Thanks you've been very helpful!

Stu_computer · 08-09-2005, 10:07 PM

Okay, you have 2 dissimilar pairs of drives, with different capacities and different transfer rates. If you partition all for a common size, say 32gig that solves the capacity issue.

Quote:

my current raid 1 is kinda slow

Now, an array can't be any faster than it's slowest drive, expanding on that we see that a nested array can't be faster than the slowest drive either. So arraying SATA with PATA would be a performance drop for the SATA drives. In other words, it's still going to be 'kinda slow' (as in 'will be the same') and you've lost the speed advantage the SATA's offered because their tied into a 'kinda slow' PATA array.

From a maintenance point of view it's not cost effective either because you would need both types as spares in case there is a disk failure. Though this probably doesn't apply to you as a home user since you can likely wait till you get a replacement.

Nested RAID Levels
.

BaP · 08-10-2005, 05:31 PM

Quote:

Originally Posted by Stu_computer

Okay, you have 2 dissimilar pairs of drives, with different capacities and different transfer rates. If you partition all for a common size, say 32gig that solves the capacity issue. Now, an array can't be any faster than it's slowest drive, expanding on that we see that a nested array can't be faster than the slowest drive either. So arraying SATA with PATA would be a performance drop for the SATA drives. In other words, it's still going to be 'kinda slow' (as in 'will be the same') and you've lost the speed advantage the SATA's offered because their tied into a 'kinda slow' PATA array.

From a maintenance point of view it's not cost effective either because you would need both types as spares in case there is a disk failure. Though this probably doesn't apply to you as a home user since you can likely wait till you get a replacement.

Nested RAID Levels
.

Thank you for the info, I would say my best bet would be to make a mirrored array using the sata's or back up more and have a faster system with a raid 0, that will also give me more HD space as well if I understand it right. Again, thanks for your help

Stu_computer · 08-11-2005, 03:32 AM

Depends what your objective is really. Is this for gaming, audio/video editing, or general use? Also depends how stable your system is too, if you have problems with lag/freezes or crashes then there is an underlying problem that needs to be fixed first.

Say you want it for gaming, then you want fast, use RAID 0 SATA's, and yes it doubles the capacity. But if a drive crashes then you lose that data. Not a big deal for gaming since most of it is read files, and you just reinstall the game. You would partition the array so each game was in it's own partition.
The PADA drives could be RAID1 with the OS on it and the rest for storage since it's a lot faster to install from a drive than from CD.
With this arrangement a game has the exclusive use of the SATA's for maximum speed because whatever houskeeping the OS is doing in the background is done with the PATA drives, so there's no intererence to the SATA's and their heads are constantly over the game files-maximum performance.

08-07-2005, 02:52 PM	#1 (permalink)
BaP Registered User Join Date: Aug 2004 Location: Fl Posts: 22 OS: win xp pro	Raid 0+1 help Is it possible to have a raid 0+1 array set up using two sata drives and two ide drives?? I would like the sata to be the stripe and the ide's the mirror. I have a asus P4C800 deluxe with 1gb of dual channel memory. I would like the sata's to be the boot drives as well. Thanks

08-07-2005, 05:50 PM	#2 (permalink)
linderman Moderator, Hardware Team Join Date: May 2005 Posts: 20,432 OS: win 2000 pro / Win XP pro My System	Welcome to TSF: Until one of our experienced raid staff can answer your question directly I suggest you review the raid info posted by Blackduck / you can find a wealth of info in the listed title of "Tweakers" (located lower in the list than motherboards & hard drives )then trouble shooting tips located at the very top of page within the Tweakers title please keep an eye on your post here someone will get to it very soon !! regards joe __________________ I still know nothing and I respect that fact, striving to improve and, along the way, help anyone that comes from the place that I used to be! Power Supply Selection LEARN TO BACK-UP YOUR DATA FREE & EASY YouTube - Runtime Software DriveImage XML tutorial Last edited by linderman; 08-07-2005 at 05:51 PM.

08-07-2005, 08:05 PM	#4 (permalink)
linderman Moderator, Hardware Team Join Date: May 2005 Posts: 20,432 OS: win 2000 pro / Win XP pro My System	sorry i should have done this the first time http://www.techsupportforum.com/hardware-support/tweakers/troubleshooting-tips-tricks/ __________________ I still know nothing and I respect that fact, striving to improve and, along the way, help anyone that comes from the place that I used to be! Power Supply Selection LEARN TO BACK-UP YOUR DATA FREE & EASY YouTube - Runtime Software DriveImage XML tutorial

08-08-2005, 06:28 PM	#8 (permalink)
linderman Moderator, Hardware Team Join Date: May 2005 Posts: 20,432 OS: win 2000 pro / Win XP pro My System	this one looks promising http://www.pcguide.com/ref/hdd/perf/...f/index-c.html joe __________________ I still know nothing and I respect that fact, striving to improve and, along the way, help anyone that comes from the place that I used to be! Power Supply Selection LEARN TO BACK-UP YOUR DATA FREE & EASY YouTube - Runtime Software DriveImage XML tutorial

08-08-2005, 06:53 PM	#10 (permalink)
linderman Moderator, Hardware Team Join Date: May 2005 Posts: 20,432 OS: win 2000 pro / Win XP pro My System	Well I hope you will pardon by ignorance, but perhaps we can learn together / I am under the impression that raid 0 is simply a drive acting alone & operating alone ???? and raid 1 = mirrored those I KNOW must be drives exactly the same size, model, speed, etc (twins if you will) I can see no logical reason why you couldnt have disimilar drives in a raid 0 +1 as long as the +1 set are identical twins ????? what is your understanding ??? hopefully Blackduck or one of the other fellas thats done this will pop in here soon they have gords of raid experience regards joe __________________ I still know nothing and I respect that fact, striving to improve and, along the way, help anyone that comes from the place that I used to be! Power Supply Selection LEARN TO BACK-UP YOUR DATA FREE & EASY YouTube - Runtime Software DriveImage XML tutorial

08-07-2005, 06:04 PM	#3 (permalink)
BaP Registered User Join Date: Aug 2004 Location: Fl Posts: 22 OS: win xp pro	Thanks joe....ahhh I can't see a "Tweakers" any where?? :(

08-08-2005, 06:44 PM	#9 (permalink)
BaP Registered User Join Date: Aug 2004 Location: Fl Posts: 22 OS: win xp pro	Thanks, got some reading to do but, I don't think it will answer my ? as can you mix sata and ide drives and get the benefits of raid 0+1? Thank you for what you have posted this is great.

08-09-2005, 07:39 PM	#11 (permalink)
BaP Registered User Join Date: Aug 2004 Location: Fl Posts: 22 OS: win xp pro	What I have is two Maxtor 40gig drives in a mirrored array now, I also have two WD 36gig 10000 rpm sata drives that I want to use because my current raid 1 is kinda slow, because I have all these drives I was wondering what would be possible to put them to use?? The idea of using the sata's as a raid 0 for the speed with the Maxtor as the mirror sounds like the best of both worlds, but is it possible and how is it done?? My ASUS P4C800-E Deluxe MB has a Promise PDC20378 controller chipset that allows multi-raid configs but, I am not knowledgeable (had to get the dictionary for that word) as to how to go about doing it. Need to be lead by the hand :) Thanks you've been very helpful!

08-11-2005, 03:32 AM	#14 (permalink)
Stu_computer Tech Hardware Team Join Date: Jul 2005 Posts: 1,459 OS: Windows	Depends what your objective is really. Is this for gaming, audio/video editing, or general use? Also depends how stable your system is too, if you have problems with lag/freezes or crashes then there is an underlying problem that needs to be fixed first. Say you want it for gaming, then you want fast, use RAID 0 SATA's, and yes it doubles the capacity. But if a drive crashes then you lose that data. Not a big deal for gaming since most of it is read files, and you just reinstall the game. You would partition the array so each game was in it's own partition. The PADA drives could be RAID1 with the OS on it and the rest for storage since it's a lot faster to install from a drive than from CD. With this arrangement a game has the exclusive use of the SATA's for maximum speed because whatever houskeeping the OS is doing in the background is done with the PATA drives, so there's no intererence to the SATA's and their heads are constantly over the game files-maximum performance. __________________