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Appendix D: Loading System Software
D–10
DAS System User Manual
If you type c in step 5, the file system Check procedure repairs the damaged file
system after a system failure occurs. An unexpected loss of power or certain
software or hardware failures can corrupt the file system and cause the system to
shut down in an uncontrolled fashion. When this happens, recent file system
changes may not be completely written to the hard disk and the file system on
the hard disk may be inconsistent.
NOTE
. If you run the File System Check procedure from the floppy disks, the
logic analyzer will ignore the settings in the Boot Option overlay.
The system normally performs the file system Check procedure at power on
unless you change the parameters in the Boot Option overlay to the Diagnostics
menu (refer to Boot Option Overlay on page 3–57). Under certain conditions, the
system may ask you to perform the file system Check procedure manually. (In
this case you would perform this procedure.) The file system Check procedure
may not be able to completely recover from all types of damage to the file
system. If system software files are either corrupted or cleared, you must rebuild
the file system using the file system Install utility.
NOTE
. You must run the file system Check procedure when (at power on) a
message indicates that the file system has been damaged and cannot be
automatically repaired. The system will not operate with a damaged file system
that it cannot repair.
There are six phases of the file system Check procedure (described later in
detail). During these phases, software attempts to reconstruct the file system by
deleting unreferenced files, rebuilding the free block list, and fixing any
inconsistencies. It may take multiple attempts to complete the repair process.
You should run the file system Check procedure until you no longer get errors or
queries (normally no more than five times).
Once you have started the file system Check procedure, it proceeds automatically.
The check procedure goes through six phases which are described beginning on
page D–11. Tables list typical messages that can be displayed during each phase of
the file system Check procedure and give an explanation of each message. The
tables also contain recommended responses to the error messages.
NOTE
. Where a message in these tables is followed by a word in parentheses, the
word indicates the actual prompt message you will see on the screen.
File System Check
Procedure
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