Question: When using a virtual disk, I understand that on a HDD there is often a write speed penalty while the drive is still growing. But for an SSD is this penalty mostly eliminated? Is there any other advantage of using a fixed size?
Answer: I don’t think that a fixed sized virtual disk give that much difference. The opposite may be true because I’ve experienced a lot of problem with sparse file allocation on some embedded devices. Hence using a SSD instead of a HDD doesn’t simplified solving the task. A fixed disk size would just eat up all free disk space and SSD is still an expensive storage hence I wouldn’t recommend to use a fixed size disk on a SSD.