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March 9th, 2021 06:00
ME4012 virtual volume access from multiple hosts
Hello All,
I have one DELL Powervault ME4012 connected to two host servers (DELL PowerEdge R740 on Ubuntu 18.04) using 12 Gbps SAS HBAs. The ME4012 storage is configured as one virtual volume with RAID type ADAPT. The volume is mounted on both host servers (EXT4). When i write a file on the mounted volume from Host A, the file does not appear on the volume mounted on Host B. The file shows up on Host B Only after I un-mount and then re-mount the volume on Host B.
I have tried changing the virtual volume cache setting using ME4012 management interface from default "Write-back" to "Write-through" to no effect. So what else can i try to make the files written from Host A visible on Host B immediately.
All help in this regard is appreciated!
Dell-DylanJ
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March 9th, 2021 10:00
Hello Amir,
Do you have your hosts clustered at all? You don't mention it and making sure the storage is cluster aware may be helpful.
As far as the storage itself goes, I don't believe you'll find much luck in changing it's configuration so that the 2 hosts get a sort of push notification from the storage. I think you'll find better success in checking the cluster configuration, so that the two hosts are aware that the storage is shared.