How to convert Thick Lazy Zeroed Hard disks to Thick Eager Zero via Commandline

Lazy Zeroed Thick: Simple and predictable, but not efficient in storage if the VM does not use all the space. Eager Zeroed Thick: The best performance for critical workloads, but creates disks more slowly and wastes unused space.

Disk provisioning comes in three main types: thin, thick (with eager-zeroed and lazy-zeroed variations), and dynamic provisioning. Each method has unique benefits and trade-offs, impacting how storage resources are used and managed.

ESXi supports two virtual disk types, thick provisioned and thin provisioned, as described in this section. Thick virtual disks, which have all their space allocated at creation time, are further divided into two subtypes: eager-zeroed and lazy-zeroed.

Eager-Zeroed Thick disks suit high-performance environments like databases, while Lazy-Zeroed Thick provides a balanced approach for general workloads. Thin Provisioning: Provides storage efficiency by allocating space dynamically as data grows, reducing

Thick provisioning is a type of storage pre-allocation. With thick provisioning, the complete amount of virtual disk storage capacity is pre-allocated on the physical storage when the virtual disk is created. A thick-provisioned virtual disk consumes all

This blog explores VMware's Thin and Thick Provisioning methods, including their features, benefits, and limitations. Discover how to convert virtual machine disks between these provisioning types.

從上述的測試結果可以得到結論，其實就虛擬磁碟 I/O 效能評比來說 Thin 與 Thick Lazy 其實 差不多，若 VM 虛擬主機需要最好的虛擬磁碟 I/O ，那麼選擇 Thick Eager 準沒錯。