EVERHART%ARISIA%rca.com@RELAY.CS.NET (10/31/86)
Alan Silverman reported a file corruption problem with "unsupported file structure" errors. We saw exactly that error on the VAX 8800 at DECUS S.F. when making up the sig tapes. The 8800 had just been rebooted and we suspected at the time that it was some kind of problem with mount/cluster vs. mount/system/cluster. Luckily we had an interim tape backup and cured the problem by dismounting and remounting the disk /cluster, deleting the garbaged files, and reloading them off tape. The problem did not recur that evening. The system was running V4.4 VMS but we didn't investigate further. It WAS an RA81 pack on an HSC though. (There were two HSCs in the cluster, an HSC50 and an HSC70; I don't know which was currently getting the disk requests at that point.) The particular systems had been undergoing some reconfigurations earlier in the day, and at least one of the tapes was REALLY bad, bad enough to force reboot of the HSCs to regain control of the situation, before any of this occurred. The HSCs had been rebooted, well before this started, but some residual problems may have remained lurking on disk in spite of failover.