11.7.4 How to Flush and Purge NVRAM (Sun Cluster 2.2 System Administration Guide)

Sun Cluster 2.2 System Administration Guide

11.7.4 How to Flush and Purge NVRAM

These are the high-level steps to flush or purge all outstanding writes for the selected controller (and all disks) or individual writes from the NVRAM to disk:

Ensuring you have a current backup of all data
Ensuring you have root privilege
Identifying the controller or disk on which to flush or purge writes
Flushing or purging all outstanding writes
Stopping all I/O to the device
Bringing the device back into service under Sun Cluster

These are the detailed steps to flush or purge NVRAM data.

Identify the controller or the individual disk to flush or purge.

You can use the luxadm(1M) command to display information for a specified controller, tray, or individual disk. For example, the following display identifies all of the disks on Controller c2.

phys-hahost1# luxadm display c2
                     SPARCstorage Array Configuration

 Controller path:
 /devices/iommu@f,e0000000/sbus@f,e0001000/SUNW,soc@0,0/SUNW,pln@a0000000,779a16:ctlr
                           DEVICE STATUS
       TRAY 1                 TRAY 2                 TRAY 3
 slot
 1     Drive: 0,0             Drive: 2,0             Drive: 4,0
 2     Drive: 0,1             Drive: 2,1             Drive: 4,1
 3     NO SELECT              NO SELECT              NO SELECT
 4     NO SELECT              NO SELECT              NO SELECT
 5     NO SELECT              NO SELECT              NO SELECT
 6     Drive: 1,0             Drive: 3,0             Drive: 5,0
 7     Drive: 1,1             NO SELECT              NO SELECT
 8     NO SELECT              NO SELECT              NO SELECT
 9     NO SELECT              NO SELECT              NO SELECT
 10    NO SELECT              NO SELECT              NO SELECT
                          CONTROLLER STATUS
 Vendor:        SUN    
 Product ID:    SSA110         
 Product Rev:   1.0
 Firmware Rev:  3.9
 Serial Num:    000000779A16
 Accumulate Performance Statistics: Enabled
 phys-hahost1#

Stop all I/O to the affected device.

Solstice DiskSuite:
- For a controller or tray, refer to the applicable steps in the procedure "11.4.1 How to Take a SPARCstorage Array Tray Out of Service (Solstice DiskSuite)".
- For a disk, refer to the applicable steps in the procedure "11.6.5 How to Replace a SPARCstorage Array Disk (Solstice DiskSuite)".
SSVM or CVM:
- For a controller or tray, refer to the applicable steps in the procedure "11.4.2 How to Take a SPARCstorage Array Tray Out of Service (SSVM or CVM)".
- For a disk, refer to the applicable steps in the procedure "11.6.6 How to Replace a SPARCstorage Array Disk (SSVM or CVM)".

Flush or purge the NVRAM on a controller, tray, or individual disk.

If you can access drives in the SPARCstorage Array, flush the NVRAM. Only purge the NVRAM if you can no longer access the SPARCstorage Array or disk.
phys-hahost1# luxadm sync_cache pathnameor phys-hahost1# luxadm purge pathname
A confirmation appears, indicating that NVRAM has been flushed or purged.

Perform the steps needed to bring the component into normal operation under Sun Cluster.

Solstice DiskSuite:
- For a controller or tray, refer to the applicable steps in the procedure "11.4.3 How to Return a SPARCstorage Array Tray to Service (Solstice DiskSuite)".
- For a disk, refer to the applicable steps in the procedure "11.6.5 How to Replace a SPARCstorage Array Disk (Solstice DiskSuite)".
SSVM or CVM:
- For a controller or tray, refer to the applicable steps in the procedure "11.4.4 How to Return a SPARCstorage Array Tray to Service (SSVM or CVM)".
- For a disk, refer to the applicable steps in the procedure "11.6.6 How to Replace a SPARCstorage Array Disk (SSVM or CVM)".