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Robin.Ma
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PostPosted: Tue Nov 01, 2016 3:08 pm    Post subject: Cannot find root partition on intel raid Reply with quote

Hi all

I install Gentoo follow the online handbook, but I get a problem, cannot find any partition on my raid disk with build kernel(genkernel), livecd is normal.

Build kernel CMD is
Code:
genkernel --mdadm --lvm --menuconfig all.

I try the --mdadm or --dmraid, but the two ways have the same result. Booting to build-in shell, just find /dev/mapper/isw_ccdcagccjj_SYSboot (dmraid) or /dev/md127 (mdadm), no any partition on this raid... , other non-raid disk is normal.
My root is partition 5, and I build the kernel with all of EFI raid modules.
Where is the problem? Kernel? :?

>Hardware environment
Mainboard: MSI Z77a-GD65
Harddisk: SSD TOSHIBA Q300pro x 2 ; Raid 0 with two disk by intel raid. 5 partition.
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mimosinnet
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PostPosted: Tue Nov 08, 2016 3:08 pm    Post subject: Re: Cannot find root partition on intel raid Reply with quote

Robin.Ma wrote:
I install Gentoo follow the online handbook, but I get a problem, cannot find any partition on my raid disk with build kernel(genkernel), livecd is normal.


Have you enabled support during boot??

Cheers!
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NeddySeagoon
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PostPosted: Tue Nov 08, 2016 3:38 pm    Post subject: Reply with quote

Robin.Ma,

Modern Intel fakeraid can either be dmraid or mdadm containers.

In general, fakeraid is a verybadthing. The only reason to use it is that you need to share the raid set with some other operating system.

Boot your install CD and get /dev/mapper/isw_ccdcagccjj_SYSboot (dmraid) and /dev/md127 (mdadm) to appear in turn.
Do these devices contain partitions?
Look with parted or fdisk.

/dev/mapper/isw_ccdcagccjj_SYSboot looks like the SYSboot partition on the logical volume /dev/mapper/isw_ccdcagccjj

Its possible but unusual to partition both types of Intel fakeraid in linux.

Are you using Windows Dynamic Disks at all?
That's software raid for Windows.
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Robin.Ma
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PostPosted: Mon Nov 14, 2016 8:18 am    Post subject: Reply with quote

NeddySeagoon wrote:
Robin.Ma,

Modern Intel fakeraid can either be dmraid or mdadm containers.

In general, fakeraid is a verybadthing. The only reason to use it is that you need to share the raid set with some other operating system.

Boot your install CD and get /dev/mapper/isw_ccdcagccjj_SYSboot (dmraid) and /dev/md127 (mdadm) to appear in turn.
Do these devices contain partitions?
Look with parted or fdisk.

/dev/mapper/isw_ccdcagccjj_SYSboot looks like the SYSboot partition on the logical volume /dev/mapper/isw_ccdcagccjj

Its possible but unusual to partition both types of Intel fakeraid in linux.

Are you using Windows Dynamic Disks at all?
That's software raid for Windows.


Thanks first for all.

Yes, I use Windows 10 on this raid disk too, but no Dynamic Disks.
My raid-group name is SYSboot.
Boot by SystemrescueCD, it use dmraid, identify the partition name is isw_ccdcagccjj_SYSbootp1 ... p5, by Gentoo Livecd, use mdadm, partition name is md127p1 ... p5.
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