There's another, possibly very significant oddity. Right now, when the
old kernel boots, it exhibits exactly the same symptoms for /dev/md0,
but not for the other arrays, the only obvious difference
being /dev/md0 is comprised entirely of disks whose udev names
are /dev/sdX, while the other arrays are built entirely from members
whose names are /dev/hdXY. In the new kernel, all the drive names
are /dev/sdX. For some reason, it is trying to assemble all the
members twice, the difference being the arrays assembled from PATA
targets are being stopped in the old kernel before the second attempt
to assemble the array, but not the new:
Dmesg | grep md from the old kernel:
[ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-2.6.32-3-amd64
root=/dev/md2 ro quiet
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-3-amd64
root=/dev/md2 ro quiet
[ 2.411210] md: raid1 personality registered for level 1
[ 2.940328] md: raid6 personality registered for level 6
[ 2.940331] md: raid5 personality registered for level 5
[ 2.940332] md: raid4 personality registered for level 4
[ 2.948514] md: md1 stopped.
[ 2.951701] md: bind<hdb1>
[ 2.951933] md: bind<hda1>
[ 2.953206] raid1: raid set md1 active with 2 out of 2 mirrors
[ 2.957738] md1: bitmap initialized from disk: read 1/1 pages, set 0
bits
[ 2.957741] created bitmap (1 pages) for device md1
[ 3.000642] md1: detected capacity change from 0 to 6292176896
[ 3.001942] md1: unknown partition table
<snip>
Compare that with the new kernel:
[ 0.000000] Kernel command line: BOOT_IMAGE=/vmlinuz-2.6.32-5-amd64
root=/dev/md2 ro quiet
[ 0.748091] usb usb1: Manufacturer: Linux 2.6.32-5-amd64 ehci_hcd
[ 0.748547] ata1: SATA max UDMA/133 port i16@0xec00 bmdma 0xe400 irq
20
[ 0.748551] ata2: SATA max UDMA/133 port i16@0xe880 bmdma 0xe408 irq
20
[ 0.748553] ata3: PATA max UDMA/133 port i16@0xe800 bmdma 0xe410 irq
20
[ 0.806045] usb usb2: Manufacturer: Linux 2.6.32-5-amd64 ohci_hcd
[ 0.807649] ata8: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xff00
irq 14
[ 0.807652] ata9: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xff08
irq 15
[ 0.820043] usb usb3: Manufacturer: Linux 2.6.32-5-amd64 ehci_hcd
[ 0.882041] usb usb4: Manufacturer: Linux 2.6.32-5-amd64 ohci_hcd
[ 0.938057] usb usb5: Manufacturer: Linux 2.6.32-5-amd64 ohci_hcd
[ 0.994029] usb usb6: Manufacturer: Linux 2.6.32-5-amd64 ohci_hcd
[ 1.050029] usb usb7: Manufacturer: Linux 2.6.32-5-amd64 ohci_hcd
[ 16.140763] md: bind<sdk1>
[ 16.150006] md: bind<sdl3>
[ 16.170380] md: bind<sdl2>
[ 16.199653] md: array md1 already has disks!
[ 16.225273] md: bind<sdi>
[ 16.349657] md: raid1 personality registered for level 1
<snip>
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