Re: [gentoo-user] Localmount starts before LVM

[Nilesh Govindrajan]

On Tuesday 11 December 2012 05:18 PM, J. Roeleveld wrote:
>
> Ouch, auto-detect does not work with metadata 1.2.
> Please read the man-page section:
> ===
> --auto-detect
>     Request that the kernel starts any auto-detected arrays. This can only
> work if md is compiled into the kernel - not if it is a module. Arrays
> can be auto-detected by the kernel if all the components are in
> primary MS-DOS partitions with partition type FD, and all use v0.90
> metadata. In-kernel autodetect is not recommended for new
> installations. Using mdadm to detect and assemble arrays - possibly in
> an initrd - is substantially more flexible and should be preferred.
> ===
>
> Please rebuild the raid-device using v0.90 metadata and try again.
>

I never had mdadm running in boot runlevel and I don't have a modular
kernel. I have compiled everything into the kernel and hence no initrd
either as I said earlier.

Raid autodetection seems to work even _without_ mdadm running.

------------------------------

[    1.202481] md: Waiting for all devices to be available before autodetect
[    1.204268] md: If you don't use raid, use raid=noautodetect
[    1.206201] md: Autodetecting RAID arrays.
[    1.232482] md: invalid raid superblock magic on sdb1
[    1.234306] md: sdb1 does not have a valid v0.90 superblock, not
importing!
[    1.263187] md: invalid raid superblock magic on sdd1
[    1.265034] md: sdd1 does not have a valid v0.90 superblock, not
importing!
[    1.285106] md: invalid raid superblock magic on sdc1
[    1.286960] md: sdc1 does not have a valid v0.90 superblock, not
importing!
[    1.288787] md: Scanned 3 and added 0 devices.
[    1.290590] md: autorun ...
[    1.292380] md: ... autorun DONE.
[    1.340838] UDF-fs: warning (device sda1): udf_fill_super: No
partition found (1)
[    1.350473] XFS (sda1): Mounting Filesystem
[    1.454096] usb usb5: suspend_rh (auto-stop)
[    1.454130] usb usb4: suspend_rh (auto-stop)
[    1.455673] usb usb2: suspend_rh (auto-stop)
[    1.455698] usb usb3: suspend_rh (auto-stop)
[    1.573933] XFS (sda1): Ending clean mount
[    1.575762] VFS: Mounted root (xfs filesystem) readonly on device 8:1.
[    1.578193] Freeing unused kernel memory: 456k freed
[    1.580154] BFS CPU scheduler v0.425 by Con Kolivas.
[    2.503599] systemd-udevd[974]: starting version 196
[    2.704048] hub 2-0:1.0: hub_suspend
[    2.704063] usb usb2: bus auto-suspend, wakeup 1
[    2.704068] usb usb2: suspend_rh
[    2.704091] hub 3-0:1.0: hub_suspend
[    2.704098] usb usb3: bus auto-suspend, wakeup 1
[    2.704102] usb usb3: suspend_rh
[    2.708031] hub 4-0:1.0: hub_suspend
[    2.708041] usb usb4: bus auto-suspend, wakeup 1
[    2.708046] usb usb4: suspend_rh
[    2.712023] hub 5-0:1.0: hub_suspend
[    2.712030] usb usb5: bus auto-suspend, wakeup 1
[    2.712034] usb usb5: suspend_rh
[    2.794061] hub 1-6:1.0: hub_suspend
[    2.794072] usb 1-6: unlink qh256-0001/ffff8800bb832980 start 1 [1/0 us]
[    2.797202] usb 1-6: usb auto-suspend, wakeup 1
[    2.973953] md: bind<sdb1>
[    3.020879] md: bind<sdc1>
[    3.086724] md: bind<sdd1>
[    3.087690] bio: create slab <bio-1> at 1
[    3.087705] md/raid0:md0: md_size is 2266111488 sectors.
[    3.087708] md: RAID0 configuration for md0 - 3 zones
[    0.524821] ACPI: Invalid Power Resource to register!
[    3.087711] md: zone0=[
[    3.087714] sdb1/sdc1/sdd1]
[    3.087721]       zone-offset=         0KB, device-offset=
0KB, size= 468863328KB
[    3.087723] md: zone1=[sdb1/sdc1]
[    3.087730]       zone-offset= 468863328KB, device-offset=
156287776KB, size= 664191360KB
[    3.087732] md: zone2=[sdb1]
[    3.087737]       zone-offset=1133054688KB, device-offset=
488383456KB, size=      1056KB

[    3.087752] md0: detected capacity change from 0 to 1160249081856
[    3.098375]  md0: unknown partition table

-------------------------------------------------------------------------

Where did md0 come from if it was not setup by mdadm?

-- 
Nilesh Govindarajan
http://nileshgr.com