From: Mike Broderick (broderic@MIT.EDU)
Date: Tue Feb 04 2003 - 23:52:53 EST
I need to develop a bare metal restore procedure for disaster recovery.
The new h/w may not be identical to the old. I boot the install CD and
restore / and /usr from tape then boot the restored O/S filesets in
single user mode and with genvmunix with plans to touch up device names
in fstab and fdmns and rebuild the kernel. But when the system boots, I
cannot access much of the devices. I get negative id values for many
devices in the h/w db...
# hwmgr v d
HWID: Device Name Mfg Model Location
------------------------------------------------------------------------------
3: (unknown)
4: (unknown) (unknown) (unknown)
5: (unknown)
29: (unknown) 3.5in floppy fdi0-unit-0
-73: (unknown) QUANTUM DLT7000 bus-2-targ-4-lun-5
-71: (unknown) QUANTUM DLT7000 bus-2-targ-4-lun-2
-69: (unknown) QUANTUM DLT7000 bus-2-targ-3-lun-5
-67: (unknown) QUANTUM DLT7000 bus-2-targ-3-lun-2
-65: (unknown) QUANTUM DLT7000 bus-2-targ-2-lun-5
-63: (unknown) QUANTUM DLT7000 bus-2-targ-2-lun-2
-61: (unknown) QUANTUM DLT7000 bus-2-targ-1-lun-5
-59: (unknown) QUANTUM DLT7000 bus-2-targ-1-lun-2
-57: (unknown) QUANTUM DLT7000 bus-2-targ-0-lun-5
-55: (unknown) QUANTUM DLT7000 bus-2-targ-0-lun-2
-53: (unknown) QUANTUM DLT8000 bus-1-targ-5-lun-0
-51: (unknown) COMPAQ CD-224E bus-3-targ-0-lun-0
-49: (unknown) COMPAQ BD009635C3 bus-0-targ-0-lun-0
-26: (unknown) SWXCR ctlr-0-unit-2
-24: (unknown) SWXCR ctlr-0-unit-1
-22: (unknown) SWXCR ctlr-0-unit-0
-20: (unknown) SWXCR xcr0
I can get devices created for the first few devices w/ positive ids
using '/sbin/dn_setup -init' and/or 'dsfmgr -K' but not for the negative
ids. I then tried to clean things up w/ this...
# hwmgr refresh comp
hwmgr: Error (13) Permission denied.
# hwmgr refresh scsi
hwmgr: Refresh SCSI database operation was successful
#
But I still have the same negative id values and unknown devices.
Is there some brute force way to wipe out the entire h/w db and recreate
it once I've booted the retored O/S filesets
_Mike
P.S. - FWIW, My ultimate task is to devise a disaster recovery
bare-metal restore process for Netbackup backed-up systems. We have the
O/S backed up as a single stream (3 big NB tar (which is a modified GNU
tar) tarballs (/,/usr,/var) on one tape. When I try to just boot the
O/S CD, mount the disks on /var and restore these tarballs to the
mounted filesets all the hard links don't restore as they try to restore
to absolute paths which crosses devices .(E.g., a hard link from 'a' and
'b' both in /etc retores as a hark link from /var/mnt/root/etc/a to
/etc/b which fails because /etc/b is on the CD.) So I'm trying to
devise another not too lenghty process to accomplish this. I tried doing
a simple clean O/S install and [v]dump that to tape to be [v]restored
whereever. But I get the above problems (negative ids) presumably since
the O/S install was [intentionally] done on different h/w. I wonder if
I may just end up having to do a O/S install from CD on the destination
system at recovery time, then restore the NB tarballs on top of that.
Anyone else dealt with this scenario before and can offer tips?
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