[SunHELP] external boot disk problems

Thu Feb 21 07:46:10 CST 2002

Try this:

#
#  First in order to do a "probe-scsi" at the "ok" prompt do this:
#
        ok setenv auto-boot? false
        ok reset

#
#  To Change the boot drive from the default (internal disk) to and external
#  Disk, follow these steps:
#

at the "ok" prompt:

        ok devalias               (see what is already defined)

        ok nvalias disk5 /iommu/sbus/..../sd at 5,0 (fill in the .... with the
                                                  appropriate info)
        # For an Ultra 2 system the device path is:
                /devices/sbus at 1f,0/SUNW,fas at e,8800000/sd at 1,0:a
	   # I believe a Sparc 20 should be similar to the Ultra 2. Not sure
tho.

        # For an Ultra 5 system the device path is:
                /devices/pci at 1f,0/pci at 1,1/ide at 3/dad at 0,0:a

        ok setenv boot-device disk#  (# is the target number of the disk)

        ok printenv boot-device   (just to double check that the change
occurred)

        ok reset  (the system should boot to using disk5 alias)

        examplt:  ok devalias
                  ok nvalias disk5 /iommu/sbus/..../sd at 5,0
                  ok setenv boot-device disk2
                  ok printenv boot-device
                  ok reset

NOTE:  once you have finished, reset auto-boot? to ture:

        ok setenv auto-boot? ture
        ok reset

Hope this helps
Dennis Lund

-----Original Message-----
From: Jason Meggs [mailto:jmeggs at bclu.org]
Sent: Sunday, February 17, 2002 2:26 PM
To: sunhelp at sunhelp.org
Subject: [SunHELP] external boot disk problems

Hi,

I have a corrupted boot disk on a sparc 20 running Solaris 2.5.1.  

Fortunately, I have a backup and an external SCSI drive.  I have
partitioned, newfs'd, and restored everything to the best of my knowledge,
as well as running installboot on the external.  

When I attempt to boot with the new drive (/dev/dsk/c0t1d0s[0134567])
using a command such as

 ok boot disk1:0 -rs
 ok boot disk1 -rs
 ok boot disk1

everything seems to be normal for a bit and then, suddenly a spray of
errors fills the screen along the lines of:

[BEGIN] 

exec /sbin/autopush -f /etc/iu.ap failed err=2 (exec of shell
failed) exec /sbin/rcS > /dev/console 2> &1</dev/console
 failed err=2 (exec of shell failed)

Cannot create /var/adm/utmp or /var/adm/utmpx
failed write of utmpx entry: "  "
SINGLE USER MODE
Please enter root passwd or type control-D to continue with normal
startup:

[END]

But one cannot enter a password or proceed, as it is then frozen.

I have been a bit surprised at not finding any clear instruction 
on this process in any man pages, texts, and faqs I've come across, 
on how to do this, so I don't know what I may be missing.

I got the same result through trying slightly different things
and even trying different media and a different partition scheme,
and being extra careful about the restore.

Any help or pointers to good information on this process would
be most appreciated.

Sincerely,

Jason Meggs
_______________________________________________
SunHELP maillist  -  SunHELP at sunhelp.org
http://www.sunhelp.org/mailman/listinfo/sunhelp

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