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sonmacharius
n00b
Joined: 11 Apr 2006
Posts: 6
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 Posted: Fri Jun 30, 2006 1:44 am Post subject: SATA RAID Question? |
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I have a question about the libata module specifically sata_mv. My question is this driver only used to see the actual physical drives? i ask this because if i set a raid 10 array of 4 physical disk to 1 logical drive throught the hardware controller. If i use the proprietary drivers from Adaptec for when installing RH9 or Windows 2K3; the OS sees the one logical drive and not the 4 physical drives which is what i want. But now if i boot gentoo or any newer Linux distro without loading the sata_mv module the OS doesnt see any drives ok thats expected. Now when i boot with the sata_mv module loaded all the distros i have tried see the 4 physical drives and not the 1 logical drive i want it to see.
So my question is, is this driver only to see the physical drives and not to interact with the controller so it recognize that theres already a raid setup and recognizes the logical drive already created?
This is the card:
http://www.tyan.com/products/html/m8110.html
Last edited by sonmacharius on Sat Jul 08, 2006 8:12 pm; edited 2 times in total |
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sonmacharius
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Joined: 11 Apr 2006
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| Posted: Sat Jul 08, 2006 5:05 pm Post subject: |
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| anyone have any thoughts on this? |
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suicidal_orange_II
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Joined: 04 Sep 2004
Posts: 299
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| Posted: Sat Jul 08, 2006 6:45 pm Post subject: |
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If your trying to share a software raid array between windows and linux its not as easy as you'd hope 
The array in windows is done in software, and while windows may only show you the raid drive, but it does know about the individual parts. I do know that the software you need to share the array is called dmraid, and its in portage, but when I tried (a couple of years ago) I had no joy with it.
http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID gives some idea about using software raid, have a read 
Good luck,
Suicidal_Orange |
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sonmacharius
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Joined: 11 Apr 2006
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| Posted: Sat Jul 08, 2006 7:57 pm Post subject: |
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| im trying to install gentoo on to this array i have created through the controller but when i put in gentoo installcd it sees the 4 physical drives (ie. sda sdb sdc sdd). and not one logical drive (ie. sda only). the machine came with driver disks for the controller but only has old rh9. if i use the rh9 proprietary driver and install rh9 the rh9 installer sees the 4 drives as one logical drive (ie. sda) which i want, same thing when i try to install windows 2k3 its see the one logical drive i created. but i dont want to use those i want to use gentoo. so my question was do i have to do something to make the gentoo see the one logical drive and not the 4 physical drives. |
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troymc
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Joined: 22 Mar 2006
Posts: 553
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| Posted: Sat Jul 08, 2006 10:01 pm Post subject: |
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So you have the SATA driver installed. You can see the disks.
Now you have to decide whether to use the onboard, fake RAID; or use Linux's native software RAID.
If you are going to dual-boot between Linux & Windows and want both RAID'ed then you need to try to use the onboard RAID.
If you are not going to dual-boot, then I highly, highly suggest you use Linux's RAID. (I cannot suggest that enough!)
If you decide to use the onboard stuff, look here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Bios_%28Onboard%29_RAID
If you decide to use Linux RAID then go here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID
troymc |
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sonmacharius
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Joined: 11 Apr 2006
Posts: 6
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| Posted: Sat Jul 08, 2006 11:03 pm Post subject: |
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| troymc wrote: |
So you have the SATA driver installed. You can see the disks.
Now you have to decide whether to use the onboard, fake RAID; or use Linux's native software RAID.
If you are going to dual-boot between Linux & Windows and want both RAID'ed then you need to try to use the onboard RAID.
If you are not going to dual-boot, then I highly, highly suggest you use Linux's RAID. (I cannot suggest that enough!)
If you decide to use the onboard stuff, look here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Bios_%28Onboard%29_RAID
If you decide to use Linux RAID then go here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID
troymc |
this fake RAID u speak of is the BIOS RAID controller right? i have a separate PCI card that i use for my RAID controller and have the one in BIOS disabled. does that fake RAID statement still apply to me? |
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suicidal_orange_II
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Joined: 04 Sep 2004
Posts: 299
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| Posted: Sat Jul 08, 2006 11:10 pm Post subject: |
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Both the onboard raid and the promise card are probably fake (software) raid. The post above sugests 2 pages to read and concider, do this and decide what you really want.
I have tried, and failed, to share raid between linux and windows, but have used the linux only version with success.
I'm drunk, probably making no sense so ignore if required  |
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troymc
Guru
Joined: 22 Mar 2006
Posts: 553
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| Posted: Sun Jul 09, 2006 12:06 am Post subject: |
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| sonmacharius wrote: | | troymc wrote: |
So you have the SATA driver installed. You can see the disks.
Now you have to decide whether to use the onboard, fake RAID; or use Linux's native software RAID.
If you are going to dual-boot between Linux & Windows and want both RAID'ed then you need to try to use the onboard RAID.
If you are not going to dual-boot, then I highly, highly suggest you use Linux's RAID. (I cannot suggest that enough!)
If you decide to use the onboard stuff, look here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Bios_%28Onboard%29_RAID
If you decide to use Linux RAID then go here: http://gentoo-wiki.com/HOWTO_Gentoo_Install_on_Software_RAID
troymc |
this fake RAID u speak of is the BIOS RAID controller right? i have a separate PCI card that i use for my RAID controller and have the one in BIOS disabled. does that fake RAID statement still apply to me? |
I'm referring to that Tyan SATA card with the AIC-8110 controller. I can find very little real info about it, but there are several dead give-aways that it is fake raid:
1. You can see the individual drives. You NEVER see the individual drives in a true hardware RAID controller.
2. It only supports RAID 0, 1 & 10. (nothing that involves any computation)
3. pg 1-1 of the user manual describes it as HostRAID, which is an Adaptec euphemism for fake RAID. http://linuxmafia.com/faq/Hardware/sata.html#adaptec-1420sa
I hope you didn't buy it really expecting a hardware RAID device. If so, you really need to send some hate mail to your vendor and Adaptec. They are not very honest about describing these things.
troymc |
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neysx
Retired Dev
Joined: 27 Jan 2003
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phorn
Tux's lil' helper
Joined: 01 Jul 2006
Posts: 109
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| Posted: Sun Jul 09, 2006 11:26 pm Post subject: |
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You probably need a dm (device mapper) interace if you can see the physical drives.
You may want to look in your device mapper directory to see if any device files are in there. If they are, mounting them should work.
You may also want to | Code: | | cat /proc/partitions |
to see if linux sees any other partitions along with the physical drives.
Likely, you have to install/compile a kernel module that will see the drives, based on the brand of RAID card you have. |
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Kernel & Hardware
