It best if you would have upgraded in increments since 1.1 & 1.5 is a big leap. This seems the file system has become corrupted from the upgrade and a clean install needs to be done. I would pull out drives about an inch, while system is down. After drives are pulled, now boot up NSS, Use Discovery tool to find unit and start system wizard. Step 6 where it ask about RAID Level, this is where you will push your drives back in. This will completely redo your system using 1.5.0 from internal Dom.
It’s possible that a drive with bad blocks also is causing the hang up, but since this happen on an upgrade then I feel it’s the file system, but doesn’t hurt to try. Pull drive 3 out about an inch and try booting up the NSS324 to see if this will allow system to completely boot. For some reason I have seen drives 3 with bad blocks stop a boot on NSS324.
Disaster recovery: Before doing any upgrades on any system its best practice to have a backup of all sensitive data just in case worst case scenario happens. Hopefully we have a backup~! In any system upgrade it's easy for errors to occur with possible system failure.
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