Interface Card Critical Resource Analysis(CRA) Whitepaper for HP-UX 11i v3

However, if there is any process that is keeping the mirror disk open, then the above operations will
return the CRA_DATA_CRITICAL error.
If the user chooses to proceed with the requested operation or overrides the error (that is, in case of
CRA_DATA_CRITICAL error), it may result in system failure and/or loss of data, in the event of
failure of the primary mirror copy.
If any of these operations must be performed for system administration purposes, an alternative path
must be configured, perhaps using an alternative healthy card (in case of the olrad operation) before
performing the above operations.
Scenario 19
System Configuration:
A logical volume (could be either LVM or VxVM volume) has been created with
two or more disks (that is, PVs), each PV has a single lunpath through same or different cards and a
file system is residing on that logical volume.
Operation Performed
: # olrad –C | -r | -d <slot id>
Or
# scsimgr disable –H <PV lunpath>
Criticality reported by CRA:
CRA_DATA_CRITICAL
Explanation and user action required:
The olrad(1M) command with –C option reports the resource usage and its criticality.
The above operations with scsimgr on any of lunpaths to the PV in the lvol and olrad(1M) with –r or –
d options on any of the cards, which provides a lunpath to the PV, will fail with
CRA_DATA_CRITICAL error. Overriding the error and proceeding with the operation will make the
lunpath unavailable and this will make the file system residing on the logical volume inaccessible
and/or result in loss of data on the file system.
If any of these operations must be performed for system administration purposes, then an alternative
path must be configured using the same or a different card (in case of the scsimgr operation) or
through an alternative healthy card (in case of the olrad operation) before performing the above
operations.
Scenario 20
System Configuration:
File system is mounted on a disk and the disk has multiple lunpaths through
same (that is, with multiple ports) or different cards.
Operation Performed:
# scsimgr disable –H <lunpath>
Criticality reported by CRA:
No user impact
Explanation and user action required:
The above operation will not have any user impact and no user action is required as long as there is
at least one another lunpath to the disk. However, if the last lunpath is being disabled, the scsimgr
will report a CRA_DATA_CRITICAL error.
However, the user may override this error using the scsimgr disable –F option. Overriding the error
and proceeding with the operation will make the disk unavailable and this will make the file system
residing on the disk inaccessible.
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