Potential DS8100/DS8300/DS8700 FICON Host Adapter Loss of Access during certain zHPF workloads

Just saw this Storage Flash pass by : 'Potential DS8100/DS8300/DS8700 FICON Host Adapter Loss of Access during certain zHPF workloads'.

What's it about ?

"Customers running zHPF enabled on DS8100/DS8300 with Release 4.3 code bundle levels 64.30.78.0 and higher or DS8700 with Release 5.0 code bundle level 75.0.x.y may see global CRC checks or repeating host adapter error recovery leading to unavailable host adapter cards and potential loss of access. DS8700s on Release 5.1 bundle levels 75.1.x.y are not exposed. DS8800s are not exposed"

Check out all the details over here.

What to do for the moment ?

• "DS8700s running zHPF on Release 5.0 should upgrade to Release 5.1 or higher (Release 6.2 bundle 76.20.82.0 is recommended). HIPER APAR OA38777 will also be available by the end of February to prevent Media Manager from using zHPF for Multi-Track Read I/O for records with data lengths less than 128 bytes; the chains will be done with FICON I/O instead.
• DS8100/DS8300s running zHPF should not be moved to a Release 4.3 bundle without applying the HIPER APAR OA38777, unless zHPF is disabled until the HIPER APAR is applied. DS8100s/DS8300s already on Release 4.3 code (64.3x.xx.0) and planning to update software service levels prior to the HIPER APAR OA38777 availability should disable zHPF until the HIPER APAR is applied."

As already indicated above : DS8800 customers are not affected.