Data recovery

Recovering Datasets from Broken ZFS raidz Pools

There are generally two kinds of people–those who’ve suffered a severe data loss and those who are about to suffer a severe data loss. I repeatedly jump back and forth between the two kinds. Recently, a combination of hardware defects and a series of power outages rendered the raidz pool of the NAS of my previous research group unreadable. The OS, an old Solaris 10 x86, would not import the pool with a dreaded I/O error message.