At first bring-up, the engineer opens the storage views to check the Data Domain's filesystem status against the expected usable capacity. What result means this check passes?
Select an answer to reveal the explanation.
Short Explanation
Online by itself means little. You want two numbers to agree - filesystem up and usable capacity matching what the purchase order says you bought. Healthy-looking systems of the wrong size are exactly quiet build errors waiting weeks to bite.
Full Explanation
The result that passes is the one reporting filesystem online and usable capacity matching purchased configuration, because any build mistake in shelf setup can show up as healthy-looking system of wrong size. The filesystem check at bring-up is two-part assertion: storage filesystem must be online before any data service can function, and usable capacity must reconcile with ordered configuration. Capacity depends on shelf and disk counts plus system configuration, so any shelf failing to present full disk set, or any configuration element left off build, produces system that is online but structurally wrong; catching it before backup traffic arrives is the entire point of doing the check now. The result reporting only online state, or treating capacity arithmetic as customer acceptance work, concedes half the question and hands sizing surprise to customer at exactly the moment they are least able to absorb it. The result reporting usable capacity exceeding purchased configuration is also failure: more capacity than purchased is still discrepancy - it may mean resource was miscounted or wrong units are being compared - and variance in either direction gets investigated, not celebrated. The result pointing to strong deduplication reduction on first writes proves nothing about reduction working at all; there is no user data to reduce, and efficiency claims belong with real data set, not day-zero baseline noise. Exam caveat: raw, usable, and post-dedup estimated capacity are three different views with different meanings - compare expected value against same view order was quoted in. Operational check: filesystem status online, and capacity view matching purchased configuration within documented tolerances, both recorded on acceptance sheet.