[Lustre-discuss] Confusion regarding deactivating OSTs

[Adeyemi Adesanya]

Hi.

We are attempting to recover from a RAID controller issue in a storage  
array that holds a couple of OSTs. We would like to tread carefully  
and eventually remount the OSTs read-only so that clients can read  
files striped to these OSTs but not write data. According to the 1.8  
manual, running 'lctl deactivate' on just the MDS will prevent new  
objects from being allocated to the OST but will allow reads AND  
writes to existing objects. Is there any way of preventing all kinds  
of write activity to the OST (not just new object creation)?

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Yemi