windows - Can some other Azure role read unwiped disk data left by my role when my role Azure VM is reclaimed? -


suppose azure role stores data on vm local disk , terminated. local disk mapped onto physical storage , data stored onto local disk written storage. when role terminates vm reclaimed , physical storage reclaimed.

now other role started , local disk happens mapped onto same physical storage used my role. i'm aware that logical structure of new local disk rebuilt , files possibly left role disappear. physical storage underneath newly created logical disk happens same.

specifically suppose new role creates empty file , calls setendoffile() "extend" file , opens reading , reads data stored on logical disk. unless special measures taken in azure infrastructure i'm not sure won't result in extending file on data stored role , reading data.

is technically possible new role read data written role?

the short answer no,

all i/o requests guest os handled hypervisor, hypervisor ensures insance can access assigned storage.

the way access data old roles physical access in containers , grab there (if ever succeed passed datacenters physical security measures , sealed containers.) , it's not going easy it's understanding logical disks not map one-to-one individual physical drives, clusters of drives, physically data dispersed across several disks well.

furthermore there offical disposal procedures in place ensure data removed disks being disposed of.

kind regards, yves


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