I had used ReadyNAS Duo v2 with 2 of 3TB HDDs on X-RAID2.
What's happning is ... 1) one of HDDs had a error 2) removed it 3) been using with one HDD for a while 4) shutdown (for my room cleanig) 5) didn't boot up (I forgot the status) 6) did [OS reinstall] from boot menu 7) RAIDar said [File System Check 100%] from start more than 1 day 😎 shutdown forcedly and did [memory test] and [disk test] from boot menu 9) passed both of tests 10) loged in from WEB-UI with default ID/password but couldn't see any files besides default [backup] folder in root 11) shutdown 12) did [OS reinstall] from boot menu again and [File System Check 100%] from start more than 1 day again
