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For a given PV you can also determine which server the IOC is running on and if rebooting the IOC does not help you can consider rebooting the server. Be mindful that this will restart all the IOCs on that server! One way to do that is using "serverStat <machine name> cycle" for any machine with ipmi. serverStat also has a "reset' option that should ideally be tried first, in particular for recorder nodes which have a RAID arrayBe particularly mindful if the machine in question is a recorder machine as the RAID arrays ideally get extra care. serverStat also takes DAQ devices names (aliases) or PVs (only for PVs originating from the same subnet). 

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