How long does server data recovery take, and what is the success rate?

It depends on the failure type. Logical damage (accidental deletion, partition or file system failure) recovers faster: a few hours for simple cases, 1-3 days for complex ones, with over 90% success. Physical damage (firmware corruption, head failure, platter scratches) needs specialized equipment, usually 3-7 days, with a 60%-80% success rate. ZhongLianDa's data recovery center has a dust-free lab and professional equipment; we test free of charge first, quote after recoverability is confirmed, and charge nothing if recovery fails.