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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!jvnc.net!yale.edu!yale!gumby!destroyer!ubc-cs!unixg.ubc.ca!ocgy.ubc.ca!laplante
- From: laplante@ocgy.ubc.ca (Denis Laplante)
- Subject: updating bad block list on SCSI disk using fx
- Message-ID: <1992Aug28.191401.29136@unixg.ubc.ca>
- Sender: news@unixg.ubc.ca (Usenet News Maintenance)
- Nntp-Posting-Host: nessie.ocgy.ubc.ca
- Organization: University of British Columbia, Vancouver, B.C., Canada
- Date: Fri, 28 Aug 1992 19:14:01 GMT
- Lines: 31
-
-
- I tried to use the fx command 'auto' to reformat a disk suspected of having
- bad blocks. The man page says
- auto Initializes a new disk. The disk is formatted, a label is created
- and written to it, and it is exercised to detect and map out bad
- blocks.
- Fx then printed 213 cryptic 2-line errors, all the same except for a block
- number near the block in error, in the form:
- fx/auto/complete: warning - data mismatch
- fx/auto/complete: Error 0 -- Couldn't find bad block on track starting with \
- block 283590 after 2 tries
- then
- writing label info to dksc(0,2,)
- ----- done-----
-
- However , when I later did 'fx/badblock/showbb' it displayed the
- same list of 57 defects as before formatting and testing with 'auto' .
- I've ignored these messages, and now have my root partition and user files
- installed with no apparent problem, but have 4 questions:
-
- 1- How likely are those 213 ignored bad blocks to come back and haunt me?
- Will these blocks just invisibly suffer from automatically recovered
- errors?
- 2- Is there a way to log recovered SCSI disk errors, as a warning of trouble
- 3- What did I do wrong for the bad block list to not be updated?
- 4- Is there a way to declare new bad blocks without losing data, and without
- I would guess that on an unmounted partition the following might do it:
- badblock/addbb
- debug/writebuf (the same block address now accesses a new disk sector)
-
- -- Denis Laplante <laplante@ocgy.ubc.ca>
-