Category Archives: vmware

Do RDMs need MPIO?

I got a great question the other day regarding VMware Raw Device Mappings: If an RDM is a direct pass though of a volume from Storage Device to VM, does the VM need MPIO software like a physical machine does? … Continue reading

Posted in IBM Storage, Storwize V3700, Storwize V7000, Uncategorized, vmware | Tagged , | 7 Comments

vSphere ESXi6.0 CBT (VADP) bug that affects incremental backups / snapshots.

VMware recently posted a new KB article 2136854 to advertise a new issue that has been found with their Changed Block Tracking (CBT) code. It’s important to note that this is not the same one as posted recently also for ESXi 6.0 … Continue reading

Posted in Actifio, vmware | 2 Comments

Do not install ESXi 5.5 Update 3 if you rely on VMware snapshots

ESXi 5.5 Update 3 was released on September 16, 2015.   Since it was released it has emerged that after upgrading an ESXi host to this update, a snapshot consolidation task can result in the relevant Virtual Machine suffering an … Continue reading

Posted in vmware | Tagged | 1 Comment

VMworld 2013 – a view from the expo floor

So I just spent four days manning the Actifio stand in the expo hall at VMworld 2013.   I wish I could tell you about all the amazing sessions I attended, but that wasn’t why I was there (although I … Continue reading

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Is auto VM-protection a good idea?

VMware snapshot backups rock. They are fast, easy and frankly quite popular.  The ability of a data protection product to leverage changed block tracking is proof positive of the power of the hypervisor. One topic we frequently debate at Actifio … Continue reading

Posted in Actifio, vmware | Tagged , , , , , | 4 Comments

The third law of the Time Lords

There is a great old saying that the marvellous thing about standards is that there are so many of them….  and things don’t get much worse than date and time formats.   Are we using DD-MM-YY or MM-DD-YY or DD-MM-YYYY…   I … Continue reading

Posted in advice, SAN, vmware | Tagged , , | 5 Comments

VMware VAAI corruption issue with DS3500

IBM recently released a flash for DS3500 and DCS3700 entitled: RETAIN tip H206954: Data corruption issue using XCOPY in VAAI   The contents of the flash are shown at the bottom of this post, so if you are a DS3500 user, … Continue reading

Posted in IBM Storage, vmware | Tagged , , , , , , | 2 Comments