Correct way to create root mirror and then split and boot alt on rp7410

[Geoff Wild]

Okay - this has got me.

11.11.

Steps to create mirror:

pvcreate -B /dev/rdsk/c20t5d0
vgextend /dev/vg00 /dev/dsk/c20t5d0
mkboot -l /dev/rdsk/c20t5d0
mkboot -a "hpux -lq (;0)/vmunix" /dev/rdsk/c20t5d0

lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c20t5d0
lvextend -m 1 /dev/vg00/lvol2 /dev/dsk/c20t5d0
lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c20t5d0
/usr/sbin/lvlnboot -r /dev/vg00/lvol3
/usr/sbin/lvlnboot -b /dev/vg00/lvol1
/usr/sbin/lvlnboot -s /dev/vg00/lvol2
/usr/sbin/lvlnboot -d /dev/vg00/lvol2
/usr/sbin/lvlnboot -R /dev/vg00

Then extend the rest:
for lv in $(< /home/gwild/vg00.lvols
do
lvextend -m 1 $lv /dev/dsk/c20t5d0
done

Then reduce the mirror:

for lv in `vgdisplay -v /dev/vg00 | grep "LV Name" | awk '{print $3}'`
do
lvreduce -m 0 $lv /dev/dsk/c20t5d0
done

vgreduce /dev/dsk/c20t5d0

I have tried doing a
lvlnboot -R /dev/vg00
after and not doing it - still can not boot alt:


Main Menu: Enter command or menu > bo alt

Alternate Boot Path: 0/0/0/3/0.5


Do you wish to stop at the ISL prompt prior to booting? (y/n) >> n

Initializing boot Device.


Boot IO Dependent Code (IODC) Revision 4


Boot Path Initialized.


HARD Booted.

ISL Revision A.00.43 Apr 12, 2000

ISL booting hpux -lq (;0)/vmunix

Boot
: disk(0/0/0/3/0.5.0.0.0.0.0;0)/vmunix
10366976 + 1949696 + 7731880 start 0x1fb9e8


gate64: sysvec_vaddr = 0xc0002000 for 2 pages
NOTICE: autofs_link(): File system was registered at index 3.
NOTICE: cachefs_link(): File system was registered at index 5.
NOTICE: nfs3_link(): File system was registered at index 6.
td: claimed Tachyon XL2 Fibre Channel Mass Storage card at 0/0/10/0/0
td: claimed Tachyon XL2 Fibre Channel Mass Storage card at 1/0/4/0/0
igelan0: INITIALIZING HP A6794-60001 PCI 1000Base-T at hardware path 0/0/8/0/0/4/0

System Console is on the Built-In Serial Interface
igelan2: INITIALIZING HP A6794-60001 PCI 1000Base-T at hardware path 1/0/1/0/0/4/0
Entering cifs_init...
Initialization finished successfully... slot is 9
WARNING: Logical volume for Dump expected but not found.
Swap device table: (start & size given in 512-byte blocks)
entry 0 - auto-configured on root device; start = 0, size = 71132960

linkstamp: Mon Oct 15 07:38:12 MDT 2007
_release_version: @(#) $Revision: vmunix: vw: -proj selectors: CUPI80_BL2000_1108 -c 'Vw for CUPI80_BL2000_1108 build' -- cupi80_bl2000_1108 'CUPI80_BL2000_1108' Wed Nov 8 19:24:56 PST 2000 $
panic: all VFS_MOUNTROOTs failed: NEED DRIVERS ?????

PC-Offset Stack Trace (read across, top of stack is 1st):
0x0020e2d8 0x00306388 0x00358bb4
0x0047806c 0x00358ea0 0x0017639c
0x001fbfe4
End Of Stack

I have done this on other systems and it works - doesn't seem to want to on this 7410...

Rgds...Geoff

[Geoff Wild]

Okay - looks I got this working - by not doing the vgreduce command - alt now boots...

Rgds...Geoff

[Torsten.]

I'm not completely sure what the lvreduce command does, but if it removes the information written by lvlnboot, the system don't know where root, stand and swap is.
lvlnboot -R works only if lvlnboot -b is set (according to the man page).

You should consider to use lvsplit instead.

[Steven E. Protter]

Shalom,

I'd look at a system hardware problem causing this versus a procedural problem. Your procedure looks good to me.

Compare your procedure to this one to see if there are any differences.

http://www.hpux.ws/?p=21

SEP