As I posted in other messages I have had two drives fail in a raidz1 set. One drive failed a month before the second and I didn't notice before the second drive failed.
I would like to send this second drive to a data recovery company. I've talked to Seagate (which is also the manufacture of the drive), who said they could attempt to recover the drive, but since it was part of a ZFS RAIDZ1 pool they couldn't offer their "No Data – No Charge Guarantee". Two questions: * is there a way to use the block checksums to discover how much data on a single drive is corrupted? * Do the members of the list have any recommendations for data recovery service company that knows about ZFS? Thanks, myers
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