[HECnet] I broke CHIMPY, again...

[Mark Wickens]

On 19/09/11 23:04, Sampsa Laine wrote:
This time by adding volume shadowing:

I added the following to MODPARAMS.DAT:

! Volume Shadowing Parameters:
SHADOWING=2             ! Enables phase II shadowing

SHADOW_SYS_DISK=1       ! Enables system disk shadowing

SHADOW_SYS_UNIT=7       ! Specifies 7 as the virtual unit number
                          of the system disk

SHADOW_MAX_COPY=3       ! Specifies that 3 parallel copies can occur at one time

SHADOW_MBR_TMO=10       ! Allows 10 seconds for physical members to fail over
                        ! before removal from the shadow set


Then ran:
@SYS$UPDATE:AUTOGEN SAVPARAMS SETPARAMS FEEDBACK

Rebooted with save feedback, when it comes up, it fails:


**** OpenVMS Alpha Operating System V8.3       - BUGCHECK ****

** Bugcheck code = 00000B14: SHDWREQALLOC, Allocation class is required for shadow set members
** Crash CPU: 00000000      Primary CPU: 00000000      Node Name: CHIMPY
** Supported CPU count:    00000001
** Active CPUs:                00000000.00000001
** Current Process:          SYSINIT
** Current PSB ID:            00000001
** Image Name:                  SYSINIT.EXE

Easiest way to fix?


You need to add an ALLOCLASS definition to MODPARAMS.DAT, or use SYSGEN to define, for example:

$ MCR SYSGEN
SYSGEN> USE CURRENT
SYSGEN> SET ALLOCLASS 100
SYSGEN> WRITE CURRENT
Ctrl-Z

then reboot. If you use SYSGEN then make MODPARAMS.DAT match. 
You'll probably need a conversational boot to get this point.

See here: http://lakesdev.blogspot.com/2009/09/volume-shadowing-system-disk-on-vax.html

Mark.