Unlike removing CPU or Memory through Dynamic LPAR operation, removing physical I/O adapters requires few additional steps at the OS level. Each physical I/O adapters do have a parent PCI device and they belong to a slot. To remove an IO adapter, PCI and its child devices and the holding PCI I/O slot need to be removed first.
Steps are detailed below.
In the following example, device fcs0 is removed through Dynamic LPAR operation.
1. Use lsdev -Cl fcs0 -F parent to find the parent pci device. Lets assume it returns "pci2"
2. Use lsslot -c slot or lsslot -c pci to find the respective slot. e.g. U001.781.DERTRGD.P1-C3
3. Remove pci and child devices. Devices shouldn't be busy. i.e. for fcs devices, volume group must be varied off and for ent devices, network interfaces
must be down.
Use the following command to remove them: rmdev -Rdl pci2
4. After removing the devices, respective slot has to be removed using
"drslot -r -s U001.781.DERTRGD.P1-C3 -c pci "
5. Now, Go to HMC and perform the DLPAR physical IO adapter remove operation. Slot must be listed in the DLPAR window.
Steps are detailed below.
In the following example, device fcs0 is removed through Dynamic LPAR operation.
1. Use lsdev -Cl fcs0 -F parent to find the parent pci device. Lets assume it returns "pci2"
2. Use lsslot -c slot or lsslot -c pci to find the respective slot. e.g. U001.781.DERTRGD.P1-C3
3. Remove pci and child devices. Devices shouldn't be busy. i.e. for fcs devices, volume group must be varied off and for ent devices, network interfaces
must be down.
Use the following command to remove them: rmdev -Rdl pci2
4. After removing the devices, respective slot has to be removed using
"drslot -r -s U001.781.DERTRGD.P1-C3 -c pci "
5. Now, Go to HMC and perform the DLPAR physical IO adapter remove operation. Slot must be listed in the DLPAR window.
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