[Info-vax] Odd BACKUP error: unsupported file structure !

[JF Mezei]

A disk to saveset image back on the same system turned out to have the
same low speed (about 45KB/s according to Backup). So I decided to end
it (it would have taken about 21 hours to complete and I have electrical
work to do requiring the system be shutdown).

So I decided to do an ana/disk/repair to get the strange error messages
that don't seem to go away:

-ANALDISK-I-BAD_FIDNUM, unexpected FID_NUM or FID_NMX field
-ANALDISK-I-INVHEADER_BUSY, invalid file header marked "busy"
        in index file bitmap
%ANALDISK-W-BADHEADER, file (4479,639,0)
        invalid file header


Any hints on what this really means ? Interesting that backup only found
a couple of "invalid structure level files", but ana/disk finds a few
hundred of the above messages. It does not seem to repair them.

My hope is that with a reboot (and a volume rebuild that takes 45
minutes), I'll be able to do a proper backup and then reinitialise the
disk with a smaller indexf.sys and perhaps it will work fine.

What is interesting is that performance when running ALLIN1 did not eem
impacted at all. But Backup is slower than a TK50 on an all mighty
microvax II.