Will upgrading Azure VM wipe out vm? -
we'd upgrade azure vm we're running our sql instance on larger server. when upgrade vm wipe out installed on server sql server?
your vhd stored in blob (a page blob, exact). separate virtual machine resources ("compute") running os within vhd.
if upgrade, won't have issue os disk, nor attached disks (up 2 per core). do run risk of losing temporary storage (typically on d drive), that's local storage , not considered durable. and... when increase instance size, there's chance current host box doesn't have enough resources larger vm size, resulting in being moved host os box (and lose temporary storage, still... no loss os disk).
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