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Problems with 2.4.9 auto-detecting raid arrays.


I'm running potato on an Ultra5, upgraded to 2.4.9.  I have an ISP
Qlogic SCSI controller, and two external MultiPacks with 4x4GB SCSI
drives in them.

I'm able to create and use RAID-1 arrays, no problems.  The problem
is, I would like to boot of RAID.  However, its seems that the
kernel fails to auto-detect them at boot-time, despite:

- compiling in RAID support, and RAID1 and RAID0
- setting the partition types of the two mirrored partitions to 0xFD
  (doesn't work as 0x83 either)

The raid array does get detected and started OK after mounting the
root partition and running /etc/init.d/raid2.  However, I would
like it to happen before that point, obviously, and this is
supposed to work. (See the snippets from 'dmesg' below)

The linux-raid mailing list appears to be dead, so this list is
my only resource.

If anyone has had any sucess with sparc-raid-kernel-detection,
please let me know.

I saw an earlier thread where Ben Collins commented that the
IOCTLs might not be fully there to support RAID, could this
be related.

Any help is appreciated.



Some details:

raiddev /dev/md0
	raid-level      1
        nr-raid-disks   2
        nr-spare-disks  0
        chunk-size      32
        persistent-superblock   1
        device          /dev/sda1
        raid-disk       0
        device          /dev/sde1
        raid-disk       1

dmesg: shortened to relevant bits with "...", and some [comments]
SCSI subsystem driver Revision: 1.00
qlogicisp : new isp1020 revision ID (5)
scsi0 : QLogic ISP1020 SCSI on PCI bus 03 device 20 irq 6969600 MEM base 0x1ff02808000
Attached scsi disk sda at scsi0, channel 0, id 1, lun 0
Attached scsi disk sde at scsi0, channel 0, id 9, lun 0
SCSI device sda: 8385121 512-byte hdwr sectors (4293 MB)
 sda: sda1 sda2 sda3 sda8
SCSI device sde: 8385121 512-byte hdwr sectors (4293 MB)
 sde: sde1 sde2 sde3 sde8
md: raid0 personality registered
md: raid1 personality registered
md: raid5 personality registered
raid5: measuring checksumming speed
   VIS       :   104.800 MB/sec
   raid5: using function: VIS (104.800 MB/sec)
   md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
   md: Autodetecting RAID arrays.
   md: autorun ...
---> [This is where it should have detected the array, /dev/md0]
   md: ... autorun DONE.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 2048 buckets, 32Kbytes
TCP: Hash tables configured (established 16384 bind 16384)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (ext2 filesystem) readonly.
---> [Here the kernel mounts the boot disk, scsi/ext2]
Adding Swap: 261344k swap-space (priority -1)
(read) sda1's sb offset: 64704 [events: 00000002]
(read) sde1's sb offset: 64704 [events: 00000002]
md: autorun ...
md: considering sde1 ...
md:  adding sde1 ...
md:  adding sda1 ...
md: created md0
md: bind<sda1,1>
md: bind<sde1,2>
md: running: <sde1><sda1>
---> [Here it finds the array!]
md: now!
md: sde1's event counter: 00000002
md: sda1's event counter: 00000002
md0: max total readahead window set to 248k
md0: 1 data-disks, max readahead per data-disk: 248k
raid1: device sde1 operational as mirror 1
raid1: device sda1 operational as mirror 0
raid1: raid set md0 active with 2 out of 2 mirrors
md: updating md0 RAID superblock on device
md: sde1 [events: 00000003](write) sde1's sb offset: 64704
md: sda1 [events: 00000003](write) sda1's sb offset: 64704
md: ... autorun DONE.

/usr/src/linux/.config: (relevant bits)
(compiled with egcs-64)
# Multi-device support (RAID and LVM)

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