A theoretical question (I do not have spare hardware to test for this).
If RAID 0 is used (no redundancy of data) with HFS Plus, and if a disk within the array is disconnected for a while whilst the file system is mounted by OS X, then I assume that:
- the OS will at least present a red alert for an improper eject
- worse behaviours may occur.
I'm not particularly interested in the behaviours of the Mac around the time of disconnection. Most interested in the aftermath …
Logically, I guess: switch off all hardware, replace the missing part of the RAID 0 array (reintroduce the missing disk) then restart the Mac.
How likely is it that the end user – the person who found or made the disconnection of the disk – might recover data in the following situations?
- Where the RAID 0 is software-controlled (for example, created by Apple Disk Utility)
- where the RAID 0 is hardware-controlled.
I imagine that the end user would find recovery difficult or impossible; that the RAID-specific expert services of a company might be required.
Whilst the question is theoretical, I will greatly appreciate any experience-based answers.