The only time you should realistically see disks going into read-only mode from ScaleIO is if you’re having _major_ underlying issues, e.g. something like major networking issues, which may cause mass drops of MDMs or bad oscillating network failures. ScaleIO (VxFlex OS) can handle MDMs disconnecting fairly well, but the only time you’d really see issues if there’s something seriously wrong with the environment; this would be similar in a Ceph or any other software defined storage platform. We actually run ScaleIO environments (MDM, SDC and SDS) on top our Compute Nodes to offer instances block storage, but there’s also no issue in connecting external SDC’s to a ScaleIO cluster (e.g. if SDS is on storage only nodes) as it’s fully supported. _____________________________________________________________________ The information transmitted in this message and its attachments (if any) is intended only for the person or entity to which it is addressed. The message may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information, by persons or entities other than the intended recipient is prohibited. If you have received this in error, please contact the sender and delete this e-mail and associated material from any computer. The intended recipient of this e-mail may only use, reproduce, disclose or distribute the information contained in this e-mail and any attached files, with the permission of the sender. This message has been scanned for viruses. _____________________________________________________________________