RAID Data Recovery Singapore

RAID exists to protect against a single disk failure — but it's not a backup, and it fails in ways that panic even experienced IT teams: a second disk drops during a rebuild, a controller dies, a volume goes offline, or a rebuild completes onto the wrong data. When that happens, business-critical files, databases and virtual machines are suddenly inaccessible.

CBL has reconstructed thousands of arrays across every RAID level and controller — hardware and software RAID, on servers and NAS units alike. We work from the member disks, rebuild the parity and stripe order, and extract your data safely. For downtime-critical systems we offer emergency and priority service, with NDAs and proper invoicing for businesses.

What we actually see in the lab

• Drives from the same batch. Members bought together and written to identically wear out together. A second failure days after the first is normal, not bad luck.
• A second failure during the rebuild. A rebuild reads every sector of every surviving member — the heaviest load the array will ever see. Marginal drives fail exactly then.
• Silent bad blocks. Sectors written years ago and never read back since. Everything looks healthy until a rebuild reaches them and stalls.
• Controller or backplane failure. A dead card orphans the configuration; a failing backplane or cable drops members intermittently, which looks like disk failure but is not.
• A member dropped offline, then re-added. A disk that fell out holds stale data. Re-inserting it after the array has moved on gives the controller two versions of the truth.
• The wrong disk replaced. Under pressure the healthy member gets pulled instead of the failed one. On a RAID 5 that is instantly two members down.
• Power events. An outage or surge mid-write leaves parity that no longer matches the data it protects.
• Accidental re-initialise. "Create new array" or "initialise" chosen at a controller prompt, usually while trying to make a missing volume reappear.

The last one is the most dangerous, because it can overwrite the layout itself. The rest is routine RAID data recovery work, provided the array is powered down before anyone tries to fix it.

Most people describe an array by the controller sitting in front of it. Each family writes its own metadata to the member disks, and knowing where that metadata lives — and when to ignore it entirely — is most of the work.

• Dell PERC. LSI-derived, with a DDF-style configuration region at the end of each member. The "foreign configuration found" prompt at boot is where PERC arrays are most often destroyed.
• HP / HPE Smart Array. Proprietary metadata and a delayed parity rotation that generic tools misread — producing a volume that mounts and then hands back corrupt files.
• LSI / Broadcom MegaRAID. The engine inside many OEM cards. Spanned levels such as RAID 50 and 60 must be reassembled span by span, in the right order.
• Adaptec. Its own metadata block, and a parity rotation that changed between card generations — so the layout is proven from the data, never assumed.
• Areca. Much of the volume-set definition lives on the card itself. A dead Areca can leave perfectly healthy members that look unpartitioned.
• Intel RST (fakeRAID). Assembled by the driver, not by a controller. A Windows reinstall, BIOS reset or motherboard swap can orphan the whole set.
• Linux mdadm software RAID. The superblock sits at a different offset depending on metadata version, usually with LVM and ext4 or XFS on top.
• Windows Storage Spaces. Slab-based rather than classic striping. Parity spaces need the pool database read before a single file can be addressed.

We also see ZFS, Btrfs and vendor variants such as Synology SHR — covered on our NAS data recovery and server recovery pages. If your controller is not listed, tell us the model anyway; the reconstruction comes from the disks either way.

People arrive here typing "RAID data recovery", "raid recovery singapore", "RAID 5 recovery", or simply "my server won't boot". The words differ. The confusion behind them is usually one of the four below.

Degraded, failed, offline

A degraded array is still running with a member missing — your data is live, but there is no protection left. A failed array has lost more members than its level tolerates and will not present a volume at all. Offline usually means the controller can see the disks but refuses to assemble them, often because the metadata on the members disagrees. Degraded is the moment to get a copy of the data off while the volume is still stable — or, if a second member is already throwing errors, to power the system down and call us. It is never the moment to experiment.

A rebuild is not a recovery

A rebuild is the controller regenerating a replacement member from parity. A recovery is a lab reconstructing your data from images of the members. They are opposites: a rebuild writes, a recovery only reads. That is why starting a rebuild onto a member that is itself failing goes so badly: the controller overwrites good parity as it goes, then stops halfway when the weak drive gives out.

Hardware RAID, software RAID, fakeRAID

Hardware RAID runs on a dedicated controller with its own processor and cache. Software RAID — mdadm, Storage Spaces, and most NAS data recovery cases — is assembled by the operating system. FakeRAID, such as Intel RST, is a driver pretending to be a controller. All three are recoverable. They simply keep their layout in different places, which is why we identify the type before touching anything.

RAID is redundancy, not backup

RAID protects against a disk dying. It does nothing about deletion, ransomware, a corrupted file system, fire or theft — every member sees those instantly and faithfully. If the array is your only copy, you do not have a backup.

CBL Data Recovery (S) Pte Ltd (UEN 201101007Z) is the service provider — not a reseller, referral service or agent. We are a data recovery laboratory. You bring or ship your storage device to our own lab at 6 Harper Road, Leong Huat Building #05-02, beside Tai Seng MRT. Our own engineers image the media in our in-house cleanroom and return your recovered files.

We do not bypass encryption or account security. Where a device is encrypted, recovery requires the owner’s own password or key. Diagnosis is free, and all work is quoted in writing before it begins.