Legacy HDS Forums

COW Pool fills up - what happens to PVOL I/O ?

Discussion created by Legacy HDS Forums on Dec 4, 2009
Latest reply on Dec 4, 2009 by Legacy HDS Forums

Originally posted by: snowyx5



We try and keep our COW Pools under close watch and right sized, however recently we ran quite close to filling one up. The pairs had been Suspended for some time (many days) and as writes continued on the PVOLs the Pool usage crept upwards.

It made me realise I'm not 100% sure what happens if a Pool gets full. Would host I/O be able to continue on the PVOL and the COW SVOLs become invalid ? Or would write I/O to the PVOLs be suspended in order to preserve a valid COW SVOL copy ?

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