I just tried something that failed. I have been running my Dell
server with SATA disks on its dual-channel controller. They are seen
as /dev/sda and /dev/sdb. I also have a disk on USB, seen as
/dev/sdd.
The root partition (containing /boot) is on /dev/sda2, known to GRUB as hd(0,1).
I also have a SCSI controller, to which is attached a DDS2 tape drive.
[EMAIL PROTECTED] scsi]$ cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 05 Lun: 00
Vendor: ARCHIVE Model: Python 28388-XXX Rev: 5.AC
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: Maxtor 6Y160P0 Rev: YAR4
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi2 Channel: 00 Id: 00 Lun: 00
Vendor: ATA Model: Maxtor 6Y200P0 Rev: YAR4
Type: Direct-Access ANSI SCSI revision: 05
Host: scsi4 Channel: 00 Id: 00 Lun: 00
Vendor: ST312002 Model: 6A Rev: 3.06
Type: Direct-Access ANSI SCSI revision: 02
Here you can see the tape drive on scsi0 ID 05
The SATA drives on scsi1 and scsi2
The USB drive on scsi4
If I now try to attach a real SCSI drive to the same host adapter as
the tape drive, it seems to be assigned to /dev/sda at boot time, and
of course the system doesn't boot because that drive doesn't have
anything bootable on it.
So my question of the day is "how are /dev/sd? names assigned to
hardware devices, and how can I change this so the SATA drives are
assigned first". I have not yet tried powering up the SCSI drives
after the system has booted, to see if they get "hotplug" mounted the
way that USB drives do.
I also have not tried looking at the BIOS view of the system with the
SCSI drives powered on. I only looked at the Host Adapter BIOS to
verify that it saw them. Maybe it's time for another system shutdown.
Makes it hard to read email, but I do have at least one other
computer. :-)
carl
--
carl lowenstein marine physical lab u.c. san diego
[EMAIL PROTECTED]
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