Search <book_title>...

InfoScale™ 9.0 Dynamic Multi-Pathing Administrator's Guide - Solaris

Last Published: 2025-04-14

Product(s): InfoScale & Storage Foundation (9.0)

Platform: Solaris

Using DMP devices as swap devices or dump devices

Oracle recommends that the swap device and the dump device are ZFS volumes. Oracle also recommends that you use the ZFS root pool to create both swap volumes and dump volumes. If both swap and dump devices are ZFS volumes created on the root pool, DMP automatically controls the swap and dump devices when you enable DMP support for native devices. That is, when you turn on the dmp_native_support tunable, the swap and dump devices are migrated to DMP control.

You can also add DMP devices as swap and dump devices.

To add a DMP devices as a swap device

To add the DMP device hitachi_vsp0_058as1 as a swap device, run the following command.
```
# swap -a /dev/dsk/hitachi_vsp0_058as1
```
To permanently add the value, update the /etc/vfstab file.
```
/dev/dsk/hitachi_vsp0_058as1 - - swap - no -
```

To verify the status of the swap device, use the following command.

# swap -l 
swapfile dev                           swaplo   blocks     free 
/dev/dsk/hitachi_vsp0_058as1 287,169       16  3071984  3071984

To delete the DMP device from swap

To delete the DMP device from swap, run the following command.
```
# swap -d /dev/dsk/hitachi_vsp0_058as2
```

To add a DMP device as a dump device

To add the DMP device hitachi_vsp0_058as2 as a dump device, run the following command.

# dumpadm -d /dev/dsk/hitachi_vsp0_058as2
Dump content: all pages
Dump device: /dev/dsk/hitachi_vsp0_058as2 (dedicated) 
Savecore directory: /var/crash  
Savecore enabled: yes   
Save compressed: on