Exadata: Oracle Enterprise Manager shows Management Server is DOWN but ping shows SUCCESS

With MOS document "EXADATA:OEM errors MS Status is DOWN and Ping Status is SUCCESS" from note ID 2112971.1 we learn that in Exadata Cell server software 12.1.2.2.0 the ipconf utility restarts the Management Server and that since ipconf runs with Exachk the MS gets restarts every time you run Exachk!  Seems like a problem huh?  The good news is that cellsrv does not actually go down, so there is no service interruption, but this is something you may need to know for your next patch application!

Exadata: Cellsrv process could crash on Storage Servers during cell-to-cell offload operations

If you are running Exadata platforms, do you know what version of software you have in your Storage Servers or what is running on your Grid Infrastructure?  Find out because the article "(DB35) Cellsrv process on storage servers may crash when performing a cell-to-cell offload operation" on My Oracle Support affects only certain combinations of software and note ID 2074393.1 details both of the patches that are needed to combat this situation!

Exadata: Cell corruption due to repeated CREATE and ALTER GRIDDISK CLI commands

Tonight you need to read "Oracle Exadata Storage Server Software 12.1.1.1.1 and Earlier may Cause Cell Disk Metadata Corruption if Many 'Create' or 'Alter' griddisk Commands are Run Over Time" via note 2029568.1 on My Oracle Support and then open up the referenced document inside to verify if you have disks which have this corruption so you can open up an SR with Oracle as this corruption cannot be resolved and you need to engage them immediately!!

Exadata: DB/ASM I/O request hangs if one cell has a problem

Very similar to my post on LCK0 hanging, there is a specific slant to the My Oracle Support document "Exadata Database Or ASM Instance Hung On IO Request When Single Cell Is Having Problem" via note ID 2002084.1 is worth checking out because there are some log entries we can look for to alert us about the next time we have this problem PLUS there is the bug that we can patch our system with too to prevent it!

Exadata: Cellsrv hangs after 12.1.1.1.1 upgrade

The good news from MOS article "Cellsrv is Hanging and RS Restarting with cellsrv RS-7445 After Upgrading to 12.1.1.1.1" in note 2013522.1 is that it may be confined to X2-2 cells, but there is always the chance that it will start to appear in other configurations as well!