[Info-vax] Backup/physical question

[JF Mezei]

Turns out that MOUNT/DENSITY only accepts numbers on VAX. And none of
them made a difference.

BUT :-)

I had a disk drive cleaning diskette. Drop a bit of alchool onto the
special paper disk, put in in disk drive, attempt to mount it so it
spins sone and then put in a different diskette from first one and:


$ mount/foreign/override=id dua2:

%MOUNT-I-MOUNTED,  mounted on _$7$DUA2: (VELOVX)
$ backup/physica
%%%%%%%%%%%  OPCOM   1-JAN-2005 06:04:03.62  %%%%%%%%%%%
Message from user SYSTEM on VELOVX
Volume "            " mounted, on physical device _VELOVX$DUA2:

Yippie ! So it isn't the Mac formatting or density that was the problem,
just the drive being unreadable.



Now...

> $ backup/physical/log dua2: dua2.save/save
> %BACKUP-E-READBLOCK, error reading block 1020 of DUA2:
> -SYSTEM-F-DRVERR, fatal drive error
> %BACKUP-S-COPIED, copied DUA2:

Does this mean a single sector was bad ? Would this mean that on the
output device, block 1020 will be full of nulls or random characters ?
Or that block 1021 on origimal device will be at block 1020 on new device ?



> $ show dev dua2/full
> 
> Disk $7$DUA2: (VELOVX), device type RX23, is online, allocated, deallocate on
>     dismount, mounted foreign, file-oriented device, shareable, error logging is
>     enabled.
> 
>     Error count                    2    Operations completed                167
>     Owner process           "SYSTEM"    Owner UIC                      [SYSTEM]
>     Owner process ID        00000213    Dev Prot            S:RWPL,O:RWPL,G:R,W
>     Reference count                2    Default buffer size                 512
>     Total blocks                2880    Sectors per track                    18
>     Total cylinders               80    Tracks per cylinder                   2
>     Allocation class               7
> 
>     Volume label                  ""    Relative volume number                0
>     Cluster size                   0    Transaction count                     1
>     Free blocks                    0    Maximum files allowed                 0
>     Extend quantity                0    Mount count                           1
>     Mount status             Process    ACP process name                     ""
> 
>   Volume Status:  Unknown ACP type.
>