misc/99529: [amr] DELL PowerEdge 2600 with streamer PowerVault 100T-DAT72 - device sa0 not exist

[Bartek Siebab]

>Number:         99529
>Category:       misc
>Synopsis:       [amr] DELL PowerEdge 2600 with streamer PowerVault 100T-DAT72 - device sa0 not exist
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jun 27 06:20:19 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Bartek Siebab
>Release:        6.1 RELEASE
>Organization:
>Environment:
>Description:
I found a problem with that streamer on raid controller Dell Perc-4Di.

It seems that booting with FreeBSD 6.0 install cd, device sa0 exist:

sa0 at amr0 bus 1 target 6 lun 0
sa0:<SEAGATE DAT  DAT72-052 A060> Removable Sequential Access SCSI-3 device
    Serial Number ......

but booting with FreeBSD 6.1 install cd, device sa0 doesn't exist,
verbose dmesg doesn't show any such device.

Full installation of 6.1 and cvsup, build, install world + kernel
(either GENERIC or SMP) doesn't help at all.

Matthew Jacob on freebsd-scsi mailing list said:
>How-To-Repeat:
On any such Dell server with that tape drive and FreeBSD 6.1 Release or Stable
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
 >Some changes to AMR caused passthru scsi devices to not appear...
 >search the lists for a discssion some weeks back about it. Can't
 >remember waht the outcome was... 
 
 It seems that somewhere between 6.0R and 6.1R something bad
 happens to kernel or FreeBSD amr driver scsi subsystem.