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GCS>Sun Microsystems>Operating Systems>Solaris Operating System
 

Applies to:

Goal

Solution

To show this as a working example, we copied c1t0d0s0 to c1t1d0s0 on a Sun Fire 280R via ufsdump and ufsrestore, then installed the boot-block. The two disks were switched, emulating the replacement of the primary disk.
Note: The ufsdump and ufsrestore process is not part of the scope of this document. You may refer to 1005672.1 and 1008580.1 .
Upon boot, the mounting of the root filesystem will be corrupted, and the boot process may fail, as seen below:

Sun Fire 280R (UltraSPARC-III) , No Keyboard 
OpenBoot 4.0, 2048 MB memory installed, Serial #16459995. 
Ethernet address 8:0:20:fb:28:db, Host ID: 80fb28db. 
Rebooting with command: boot disk
Boot device: /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@0,0  File and args:
SunOS Release 5.8 Version Generic_108528-10 64-bit 
Copyright 1983-2001 Sun Microsystems, Inc. All rights reserved. 
configuring IPv4 interfaces: eri0. 
Hostname: ib-sf280r 
mount: /dev/dsk/c1t0d0s0 is not this fstype. 
/sbin/rcS: /etc/dfs/sharetab: cannot create failed to open /etc/coreadm.confsyseventd: 
Unable to open daemon lock file '/etc/sysevent/syseventd_lock':'Read-only file system'
INIT: Cannot create /var/adm/utmpx
INIT: failed write of utmpx entry:"  "
INIT: failed write of utmpx entry:"  " 
INIT: SINGLE USER MODE
Type control-d to proceed with normal startup,(or give root password for system maintenance):
single-user privilege assigned to /dev/console. 

Entering System Maintenance Mode

The output from df -k may show the physical disk device mounted, but not the logical device (c1t0d0s0):

# df -k
Filesystem            kbytes    used   avail capacity  Mounted on
/pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w210000203746f423,0:a
4131866  888592 3201956    22%    /
/proc                      0       0       0     0%    /proc
fd                         0       0       0     0%    /dev/fd
mnttab                     0       0       0     0%    /etc/mnttab
swap                 2756696       0 2756696     0%    /var/run

The disk device that the system was booted from, is disk@w210000203746f423,0:a. This disk's WWN does not match the WWN of the disk that the vfstab file shows to be the boot device. To correct this situation, boot to mini-root from a Solaris OS CD-ROM or install image("boot net -s" or "boot cdrom -s"), and recreate the link, of the physical device path (/devices) to the logical device name (c1t0d0s0) by following the steps below:

ok boot net -s
INIT: SINGLE USER MODE

Mount the root filesystem to /mnt

# mount /dev/dsk/c1t0d0s0 /mnt

Determine (from the vfstab file) the expected logical boot device (c1t0d0s0)

# more /mnt/etc/vfstab
#device         device          mount           FS      fsck    mount   mount
#to mount       to fsck         point           type    pass    at boot options
#
#/dev/dsk/c1d0s2 /dev/rdsk/c1d0s2 /usr          ufs     1       yes     -
fd      -       /dev/fd fd      -       no      -
/proc   -       /proc   proc    -       no      -
/dev/dsk/c1t0d0s1       -       -       swap    -       no      -
/dev/dsk/c1t0d0s0       /dev/rdsk/c1t0d0s0      /       ufs     1       no
swap    -       /tmp    tmpfs   -       yes     -

Determine if the correct physical disk, as determined by its WWN (World Wide Number), is linked to the logical name (from the vfstab file) of /dev/dsk/c1t0d0s1:

# cd /mnt/dev/dsk
# ls -al c1t0d0s0
lrwxrwxrwx   1 root     root          70 Sep 10 12:29 c1t0d0s0 ->
../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w2100002037c80681,0:a

This shows the disk with the WWN of w2100002037c80681 as the linked disk. The disk device should be w210000203746f423 (as shown in the df -k output above.)

To fix the problem:

Make the device paths and instance numbers in the /etc/path_to_inst file, equivalent to the miniroot devices from the cdrom/net boot:

# devfsadm -r /mnt -p /mnt/etc/path_to_inst

Make the /device directory equivalent to the mini-root devices created from the cdrom/net boot. This may not be necessary if the correct device tree exists:

# cd /devices
# find . -print|cpio -pduVm /mnt/devices
0 blocks

Create the links from the correct logical device to the physical device:

# disks -r /mnt

Notice the change in the link from c1t0d0s0 to the correct disk:

# cd /mnt/dev/dsk # ls -l c1t0d0s0 lrwxrwxrwx   1 root     root          70 Sep 11 10:38 c1t0d0s0 -> ../../devices/pci@8,600000/SUNW,qlc@4/fp@0,0/ssd@w210000203746f423,0:a

Alternate fix if using a Solaris 8 OS cdrom or net image:

Remove the old path_to_inst file:

# mv /mnt/etc/path_to_inst /mnt/etc/orig.path_to_inst

Remove all the old device links:

# rm /mnt/dev/rdsk/c* ; rm /mnt/dev/dsk/c* ; rm /mnt/dev/rmt/*

Rebuild the device structure using the devfsadm command:

# devfsadm -r /mnt -p /mnt/etc/path_to_inst

Now that the boot device is associated with the correct logical and physical Solaris OS device, this disk will boot, providing the OpenBoot[TM] PROM (OBP) monitor has a correct boot alias (aka disk, disk1 etc). It might be advisable to set the OBP boot-device variable with luxadm prior to rebooting. At a later time, a boot alias can be created at the OBP:

Before :

# eeprom|grep boot-device
boot-device=/pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w2100002037c80681,0:a
# luxadm set_boot_dev /dev/dsk/c1t0d0s0
Do you want to change boot-device to the new setting  (y/n) y

After :

# eeprom|grep boot-device
boot-device=/pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w210000203746f423,0:a

*NOTE: If platform has a graphics card installed, a reconfiguration

boot is required to allow X-windows to start on console.

# reboot

A reboot at this point, will boot to the correct boot device, using the boot-device variable. If a boot alias is desired, use show-disks to create it. Then set boot-device to the new alias:

ok show-disks
a) /pci@8,600000/SUNW,qlc@4/fp@0,0/disk
b) /pci@8,700000/scsi@6,1/disk
c) /pci@8,700000/scsi@6/disk
q) NO SELECTION
Enter Selection, q to quit: a
/pci@8,600000/SUNW,qlc@4/fp@0,0/disk has been selected.
Type ^Y ( Control-Y ) to insert it in the command line.
e.g. ok nvalias mydev ^Y
for creating devalias mydev for
/pci@8,600000/SUNW,qlc@4/fp@0,0/disk
ok nvalias new-disk /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w210000203746f423,0:a
ok devalias
new-disk                 /pci@8,600000/SUNW,qlc@4/fp@0,0/disk@w210000203746f423,0:a
ok setenv boot-device new-disk
boot-device =         new-disk
ok boot

The system should now be booting correctly.

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