Tag Archives: CBT

VMware ESXi CBT bug PT3 — ESXi 5.5 now fixed.

This now becomes the 3rd post regarding the infamous Changed Block Tracking bug that was/is evident in all versions of ESXi 4+. If you missed them, Part 1  &  Part 2 Finally today we see the bug squashed in ESXi 5.5 with the release of Patch ESXi-5.5.0-20150104001-standard (2099271). This still leaves 4.x susceptible though so I urge any good folk using… Read more »

VMware ESXi CBT bug — FIXED, sort of.

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I’ve previously posted in detail about the VMware ESXi CBT bug here It’s taken a while but VMware have today released patches to address this issue for older versions of ESXI 5.0 & 5.1 Disappointingly, still no fix for ESXI 4.0 and more importantly ESXi 5.5 (Rumoured to be coming Jan 2015) ESXi 5.0 Patch 10; Release Notes ESXi 5.1… Read more »

VMware ESXi CBT Bug – Your data may be at risk

Changed Block Tracking (CBT) is a great feature introduced in ESXi 4.0, that effectively brought incremental backup technology to our virtual machines. Third parties were able to leverage this so backups would only require the processing of blocks that have changed rather than all blocks. This saved inordinate amounts of time, data and effort while allowing vendors to support flexible backup… Read more »