Hello guys,

while upgrading from SLES SP2 to SP3 i can see, along with the common:
"sles11-sp3-pool-x86_64-sap-sp3"
"sles11-sp3-updates-x86_64-sap-sp3"

channels also this ones:

sles11-sp1-pool-x86_64-sap-sp3
sles11-sp1-updates-x86_64-sap-sp3
sles11-sp2-core-x86_64-sap-sp3
sles11-sp2-updates-x86_64-sap-sp3

Im a bit confused, thus the question here is what is the purpose of this channels?
Are they also mendatory for distribution upgrade process? As just mentioned, usualy i would only those:

sles11-sp2-updates-x86_64-sap-sp3
sles11-sp2-updates-x86_64-sap-sp3


Thanks,
Rafael