Re: (no subject)

On Wednesday September 11, ejohnson@milleraa.com wrote:

I installed Suse Linux Professional 8 on a HP Netserver LC3 PII/450.  An
AHA-2940 UW Scsi host adapter with a AIC-78XX Scsi Protocol Chip/50 pin
high density scsi-2 control.  I have a raid (3 drives) off the host
adapter and a 80 gig scsi drive off the mother board. After launching
yast2 the first raid has the following device: LD0 raid 5 34730R:
device_name /dev/sda, vendor megaraid.  Disk two (80 gig drive) has LD1
raid 0 70006R: device name /dev/sdb vendor the same as above.  There was
no raidtab file so I created one with the following:

It sounds like you have hardware raid (megaraid) that presents the two
raid devices as /dev/sda and /dev/sdb so they look like scsi devices,
but are really raid arrays.
In this case, you don't need raidtab or mkraid at all.  These are for
'software' raid which is quite separate from hardware raid.

software raid:  Linux kernel does all raid management.
hardware raid: special card knows about raid and does lots of the work
		rest of work done in the driver for the card.

NeilBrown

raiddev /dev/md0
raid-level 5
nr-raid-disks 1(little sketchy on this because it is three drives that
make up the raid)
nr-spare-disks 0
persistent superblock 1
parity-algorithm left-symmetric
chunk-size 2048
device /dev/sda
raid-disk 0 (sketchy here as well)

#Second drive
raiddev /dev/md1
raid-level 5
nr-raid-disks 1
nr-spare-disks 0
persistent-superblock 1
chunk-size 2048
device /dev/sdb
raid-disks 1 (sketchy as well)

Trying to follow the procedures and I type:
mkraid /dev/md0 and I get:

Handling md device /dev/md0
analyzing super-block
disk 0: /dev/sda, 35563520kb, raid superblock at 35563456kb

Second drive I get:

Handling md deviice /dev/md1
analyzing super-block
disk 0: /dev/sdb, 71686144kb, raid superblock at 71686080kb

I then type cat /proc/mdstat and get the following:

Personalities [RAID5]
read_ahead not set
md1: inactive sdb [0]
     71684096 blocks
md0: inactive sda [0]
     35561472 blocks
unused devices: <none>

If I read this correctly both are inactive when it should be stating
that they are active.  At this point I am baffled any suggestions or
possible directions would greatly be appreciated.


Thanks in advance,
Ed

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