/* Start an asynchronous write of buffer contents to block on volume */
public void startPush() {
isPinned = true;
try {
_disk.startRequest(this, DiskOperationType.WRITE);
} catch (IllegalArgumentException | IOException e) {
e.printStackTrace();
}
isClean = true;
}
/* Start an asynchronous fetch of associated block from the volume */
public void startFetch() {
isPinned = true;
// fetch
try {
_disk.startRequest(this, DiskOperationType.READ);
} catch (IllegalArgumentException | IOException e) {
e.printStackTrace();
}
isValid = true;
}
