FREQUENTLY ASKED QUESTIONS:

RAID reconstruction (go back)


Q: Will RAID reconstructor modify any data on source RAID drives?
A: NO, UFS Explorer will not modify any data on source disks.

Q: What means "Disk 0 not contains supported structures to identify RAID automatically. Do you want to continue with RAW RAID mode and user-defined RAID parameters?"
A: This is warning message informing you that RAID has no data for RAID layout auto-detection. After this message you may allow UFS Explorer to use user-defined RAID configuration.

Q: What is parity distribution in my RAID5?
A: This depends of controller for hardware RAID and software settings for software RAID. Most widely used parity distributions are:

• Left Asymmetric - most mass NAS devices and most hardware RAIDs;
• Left Asymmetric with delayed parity - older Compaq/HP hardware RAIDs;
• Right Symmetric - most MacOS software RAIDs.

Please read your controller/software technical specification to find which parity distribution is used in your case.

Q: Will it recover data on an XYZ RAID Array?
A: If RAID level and file system are supported it should. You have only set up right RAID configuration.

Q: I am trying to recover a XYZ system. Do you know all the settings to recover that RAID?
A: Currently we are working on logical data recovery only and thus could not know all RAID device models. Please check system manual or your notes to find right RAID configuration. Alternatively you may apply for our data analysis service.

Q: Disks still have data on them, but I cannot see it. See only 'unknown' partition.
A: Some RAID configurations (including most software RAIDs) does not have nasted partition structures thus UFS Explorer is unable to detect partition automatically. Instead it shows one 'unknown' partition. Right click it and choose 'File systems: fast detect' to find correct file system. If it does not detect, probably virtual RAID configuration is invalid.
Additionally some NAS (like 'FalconStor') use own nasted structures to define nasted partitions. Use Data Recovery: lost partitions recovery method for these cases.

Q: I have Buffalo Terastation... How to recover the data?
A: Currently Buffalo Terastation is one of most popular mass NAS storages and UFS Explorer fully supports data recovery from this NAS.
Good instruction about data recovery from Buffalo Terastation is available here.

Q: I have XYZ NAS... How to recover the data?
A: UFS Explorer supports data recovery from most mass NAS.
Please refer to this article for general information about NAS recovery. You may also read full instruction about data recovery from Buffalo Terastation as example.

Q: How long RAID reconstruction runs?
A: UFS Explorer builds RAID on-the-fly with no intermediate files creation. Thus actual RAID reconstruction usually takes less then second.