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

[JF Mezei]

Alpha VMS 8.3, the source disk is ODS5

backup/image/ignore=interlock disk1: lda2:/init

%BACKUP-E-OPENIN, error opening $11$DQB0:[ALLIN1.LIB_SHARE]BALLCAP.EPS;1
as input
-SYSTEM-W-FILESTRUCT, unsupported file structure level



$ dir/full $11$DQB0:[ALLIN1.LIB_SHARE]BALLCAP.EPS;1

Directory $11$DQB0:[ALLIN1.LIB_SHARE]

BALLCAP.EPS;1                 File ID:  (58136,1,0)
Size:           12/18         Owner:    [ALLIN1]
Created:    30-MAR-1996 18:20:43.55
Revised:    30-MAR-1996 21:29:14.43 (6)
Expires:    10-JUL-2022 00:00:00.00
Backup:     <No backup recorded>
Effective:  <None specified>
Recording:  <None specified>
Accessed:   <None specified>
Attributes: <None specified>
Modified:   <None specified>
Linkcount:  1
File organization:  Sequential
Shelved state:      Online
Caching attribute:  Writethrough
File attributes:    Allocation: 18, Extend: 0, Global buffer count: 0
                    No version limit
Record format:      Stream_CR, maximum 0 bytes, longest 96 bytes
Record attributes:  Carriage return carriage control
RMS attributes:     None
Journaling enabled: None
File protection:    System:RWED, Owner:RWED, Group:RE, World:RE
Access Cntrl List:  None
Client attributes:  None

Total of 1 file, 12/18 blocks.


The other *.EPS files in that directory are also Stream_CR and didn't
generate any error. ANA/RMS on the file uncovered no errors.

I do not trust the disk (which is why I am doing an /IMAGE to a
temporary disk with goal of reinitialzing this disk and repopulating it.
But if the backup is unreliable, I may have to think twice about it.

INDEXF.SYS had grown to over 170,000 blocks (I had done a backup of a
mac on it it it created a gazillion files which took forever to delete.

Knowing what causes this error message might help understanding the
health level of the disk and the trustability of the backup I am making.

BACKUP is being extremely slow and also slows down disk accesses in
another DCL process  despite CPU being at 0 and the disk IOs being
generally below 1 operation per second (sometimes peaks to about 25-30
for a short time)



Also, Backup is only using a working set of about 1200 pages. Isn't
backup supposed to use over 10k pages to make itself more efficient ? Or
was that only on VAX ?