HP 250 Operating page 133

In Case of Difficulty
An
*
appears in place of the sector number when successive
sectors of a track cause errors. When testing a flex disc, head
o
is the bottom side and head 1 is the top side.
When WITH RECOVERY is selected, the test stops to display the
location and type of each error. You may choose to attempt to
recover (re-write) the file (press YES) or simply log the error
and continue (press NO). If the recovery fails, note the file
name so you can attempt to manually read the file later.
• For type PROG files, manually recover by LOADing and SAVEing
the file. Then press CTRL HALT to erase any unexpected code.
Now GET the program and RE-STORE it on another media.
• For type DATA files, attempt to GET or manually read the
data.
• For type DSET or ROOT files, attempt to do a serial unload
(DBUNLD) and recreate the file as described in the System
Utilities Manual.
All other file types are not recoverable except via the VERIFY
routine.
IMPORTANT
The detection of any errors on a media
indicates that either the media is worn
or defective or the drive requires ser-
vice. After running VERIFY with recov-
ery, the media should be backed up onto
a known good media. Consult your prin-
cipal operator for details.
If Error in Main Directory appears when running WITH RECOVERY,
press EXIT and then press CHECK AVT to rebuild the availability
table. If the AVT fails, press RECORD 0 RECOVERY and copy the
spare directory to the main. Then run CHECK AVT again. Once the
main directory and availability table appear OK, run VERIFY
again.
10-12
In Case of Difficulty
An
*
appears in place of the sector number when successive
sectors of a track cause errors. When testing a flex disc, head
o
is the bottom side and head 1 is the top side.
When WITH RECOVERY is selected, the test stops to display the
location and type of each error. You may choose to attempt to
recover (re-write) the file (press YES) or simply log the error
and continue (press NO). If the recovery fails, note the file
name so you can attempt to manually read the file later.
• For type PROG files, manually recover by LOADing and SAVEing
the file. Then press CTRL HALT to erase any unexpected code.
Now GET the program and RE-STORE it on another media.
• For type DATA files, attempt to GET or manually read the
data.
• For type DSET or ROOT files, attempt to do a serial unload
(DBUNLD) and recreate the file as described in the System
Utilities Manual.
All other file types are not recoverable except via the VERIFY
routine.
IMPORTANT
The detection of any errors on a media
indicates that either the media is worn
or defective or the drive requires ser-
vice. After running VERIFY with recov-
ery, the media should be backed up onto
a known good media. Consult your prin-
cipal operator for details.
If Error in Main Directory appears when running WITH RECOVERY,
press EXIT and then press CHECK AVT to rebuild the availability
table. If the AVT fails, press RECORD 0 RECOVERY and copy the
spare directory to the main. Then run CHECK AVT again. Once the
main directory and availability table appear OK, run VERIFY
again.
10-12