IBM Storwize V7000, Problem Determination Manual

Page: 280 / 314

shutdown -fr now
a. Watch out for the grub boot screen on the KVM and select the kernel on the
screen.
b.
Press the e key to edit the entry.
c. Select the second line, the line that starts with the word kernel.
d. Press the e key to edit the kernel entry to append single-user mode.
e. Append the letter S or word Single to the end of the kernel line.
The following screen is an example.
[ Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists the possible
completions of a device/filename. ESC at any time exits.
]
grub edit> kernel /boot/vmlinuz-2.6.15-1-686 root=/dev/sda1 ro Single_
f. Press the Enter key.
5. From the root shell, type passwd .
The passwd program prompts you for the new root password. This root
password changes at the end of the procedure.
6.
Reboot the file module to normal mode. Issue the following command:
shutdown -fr now
a. Wait until the KVM goes past the Grub screen this time and log in when
you are prompted to log in.
b. Log in as
root
with the new password on the KVM.
7. Go back to the management CLI to resume the file module back in to the GPFS
cluster.
a. Add the mgmt001st001 file module back to the system. Issue the following
command:
resumenode mgmt001st001
b.
Wait until the
lsnode
command shows that there are 2 online nodes in the
cluster.
8. From the KVM where you logged on as
root
, use the
chrootpwd
command to
change the root password on both file modules.
The chrootpwd program prompts you for the new root password.
The chrootpwd program sets the new root password on both file modules in the
cluster.
Resetting the NAS ssh key for configuration communications
The configuration communications between the Storwize V7000 file modules and
the control enclosure are done by using ssh over the site 1 Gbps Ethernet LAN;
whereas the file data traffic is passed over the direct connect Fibre Channel links
by using the SCSI protocol.
256
Storwize V7000 Unified: Problem Determination Guide Version