What you’re seeing
- The server's management tool, an email alert or a front-panel light reports the RAID 1 array as "Degraded."
- One drive shows as failed, missing, offline or "predictive failure," and the server may be beeping.
- Both drives in the mirror report media errors, reallocated sectors or SMART warnings.
- A rebuild started but has stalled, failed or restarted repeatedly.
- The server feels slower than usual, especially during the morning rush or nightly backups.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- One drive in the mirror has failed outright, leaving the array running on a single copy with no redundancy.
- Both drives were bought together and have reached the end of their life at about the same time.
- Unreadable sectors on the surviving drive cause a rebuild to fail, because the controller cannot copy data it cannot read.
- A loose cable, faulty backplane slot or failing RAID controller is dropping a healthy drive out of the array.
- Outdated controller firmware or a dead cache battery is causing drives to be marked bad incorrectly.
- A replacement drive is smaller, incompatible or a different type than the controller expects.
Why it matters
A degraded mirror means the server is one drive failure away from losing everything stored on it: shared files, line-of-business databases, email archives or virtual machines. If both drives are showing errors, that margin may already be gone. A failed rebuild done without care can turn a recoverable situation into a costly data recovery job, and a server outage can stop the entire office. Confirming that a working backup exists is just as urgent as fixing the array.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
Is our data safe right now?
It is at elevated risk. The server is still running on one copy of the data, so we prioritize confirming a current, restorable backup before any rebuild or drive replacement is attempted.
Can we just swap in a new drive and let it rebuild?
Sometimes, but a rebuild puts heavy load on the remaining drive, and if that drive also has errors the rebuild can fail partway. We assess the health of both drives and the controller first so the replacement is done in the right order.
Can this be managed remotely?
The diagnosis, backup verification and rebuild monitoring can be done remotely. Physically swapping a drive needs someone on site, and we guide them through exactly which drive to remove.