Funny how posting to a list, after trying to solve it yourself for a day or so, can result in solving your own problem, an hour later.
After posting, I spent some time perusing ./drivers/md/md.c, and realized that the kernel requires some boot parameters to tell it which disks to probe for the persistent super block info. This would probably be a good thing to get added to the HOWTO. So, to use my problem below, I appended the following to my boot prompt: SILO: linux md=0,/dev/sda1,/dev/sde1 And I was rewarded with: 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 ... md: ... autorun DONE. md: Loading md0: /dev/sda1 (read) sda1's sb offset: 64704 [events: 00000006] md: bind<sda1,1> (read) sde1's sb offset: 64704 [events: 00000006] md: bind<sde1,2> md: sde1's event counter: 00000006 md: sda1's event counter: 00000006 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: 00000007](write) sde1's sb offset: 64704 md: sda1 [events: 00000007](write) sda1's sb offset: 64704 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. ---> Note, the root filesystem only got mounted here! Hope this helps someone else. Cheers, k On Mon, Oct 08, 2001 at 09:22:34PM -0400, [EMAIL PROTECTED] wrote: > Hello: > > 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. > > Thanks, > > Keith > > Some details: > > /etc/raidtab: > 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) > # > CONFIG_MD=y > CONFIG_BLK_DEV_MD=y > CONFIG_MD_LINEAR=m > CONFIG_MD_RAID0=y > CONFIG_MD_RAID1=y > CONFIG_MD_RAID5=y > CONFIG_BLK_DEV_LVM=m > CONFIG_BLK_DEV_RAM=m > CONFIG_BLK_DEV_RAM_SIZE=4096 > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". 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