[4052] in linux-scsi channel archive
Three Controller setup
daemon@ATHENA.MIT.EDU (John Gibson)
Tue Jun 2 12:33:51 1998
Date: Tue, 02 Jun 1998 09:30:17 -0700
From: John Gibson <john.gibson@tekelec.com>
To: Linux SCSI Mailing List <linux-scsi@vger.rutgers.edu>
Cc: Linux Raid Mailing List john <linux-raid@vger.rutgers.edu>
Any suggestions/recommendations on the following would be greatly
appreciated:
I want to use RAID1 (mirroring) with two SCSI controllers. I would
also like to use one of the two controllers for my cdrom and tape
drives. I chose the Adaptec AHA-2940UW SCSI controller.
I could not get a successful SCSI subsystem recovery when I
powered down (fault simulation) the mirrored data disk which
had the cdrom and tape attached to the same controller. (Wide
SCSI vs narrow?) The same simulation worked okay when I
powered down the drive which did not have the tape and cdrom
on its controller.
Since I have a spare ISA slot, I moved the tape and cdrom to
an Adaptec AHA-1540B ISA card. Now the system wants to boot
from the ISA card which, of course only has the tape and cdrom
attached to it. It seems as if the 1540 ISA card is being set
up as SCSI controller 0 and the system expects to boot
from it. Is there some explicit configuration file(s) that I can
specify which controller is the boot controller?
I did try using a 3rd AHA-2940UW PCI card instead of the AHA-1540B
ISA card. That seems to be fine. Everything seems to work this
way, but I need the PCI slot.
Thanks in Advance,
...john
******************************************************************
Configuration #1
All SCSI devices recognized. Mirror (RAID1) set up okay on data disks.
Test partitions on /dev/sdb1 and /dev/sdd1 are 200MB. Power down
on /dev/sdd1 causes no problems. The system and mirror work okay.
However, power down /dev/sdb1 causes the system to hang. It looks
as if (layman here talking) the SCSI bus tries to reset but it
never really recovers correctly.
AHA-2940UW (PCI) (Controller 0)
|
|
|--{ SCSI ID=0, LUN=0: boot disk, /dev/sda, Seagate ST32272W (2Gig) }
|
|
|--{ SCSI ID=1, LUN=0: data disk, /dev/sdb1, Seagate ST19101W (9Gig) }
|
|
|--{ SCSI ID=4, LUN=0: tape drive, /dev/st0, Exabyte Eliant 820 }
|
|
--{ SCSI ID=6, LUN=0: cdrom drive, /dev/sr0, Toshiba XM5701B }
AHA-2940UW (PCI) (Controller 1)
|
|
|--{ SCSI ID=0, LUN=0: boot mirror disk, /dev/sdc, Seagate ST32272W
(2Gig) }
|
|
--{ SCSI ID=1, LUN=0: data mirror disk, /dev/sdd1, Seagate ST19101W
(9Gig) }
******************************************************************
Configuration #2
All SCSI devices recognized. Mirror (RAID1) set up okay on data disks.
Test partitions on /dev/sdb1 and /dev/sdd1 are 200MB. Power down
on either /dev/sdb1 or /dev/sdd1 causes no problems.
The system and mirror work okay.
However, I can't really afford the loss of the PCI slot so I tried
using an ISA card. See config #3.
AHA-2940UW (PCI) (Controller 0)
|
|
|--{ SCSI ID=0, LUN=0: boot disk, /dev/sda, Seagate ST32272W (2Gig) }
|
|
--{ SCSI ID=1, LUN=0: data disk, /dev/sdb1, Seagate ST19101W (9Gig) }
AHA-2940UW (PCI) (Controller 1)
|
|
|--{ SCSI ID=0, LUN=0: boot mirror disk, /dev/sdc, Seagate ST32272W
(2Gig) }
|
|
--{ SCSI ID=1, LUN=0: data mirror disk, /dev/sdd1, Seagate ST19101W
(9Gig) }
AHA-2940UW (PCI) (Controller 2)
|
|
|--{ SCSI ID=4, LUN=0: tape drive, /dev/st0, Exabyte Eliant 820 }
|
|
--{ SCSI ID=6, LUN=0: cdrom drive, /dev/sr0, Toshiba XM5701B }
******************************************************************
Configuration #3
This configuration is not booting. It seems as if the 1540 ISA card
is being set up as SCSI controller 0 and the system expects to boot
from it. Is there some explicit configuration file(s) that I can
specify which controller is the boot controller?
AHA-2940UW (PCI) (Controller 0: desired)
|
|
|--{ SCSI ID=0, LUN=0: boot disk, /dev/sda, Seagate ST32272W (2Gig) }
|
|
--{ SCSI ID=1, LUN=0: data disk, /dev/sdb1, Seagate ST19101W (9Gig) }
AHA-2940UW (PCI) (Controller 1: desired)
|
|
|--{ SCSI ID=0, LUN=0: boot mirror disk, /dev/sdc, Seagate ST32272W
(2Gig) }
|
|
--{ SCSI ID=1, LUN=0: data mirror disk, /dev/sdd1, Seagate ST19101W
(9Gig) }
AHA-1540B (ISA) (Controller 2: desired)
|
|
|--{ SCSI ID=4, LUN=0: tape drive, /dev/st0, Exabyte Eliant 820 }
|
|
--{ SCSI ID=6, LUN=0: cdrom drive, /dev/sr0, Toshiba XM5701B }
******************************************************************
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