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From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga.tech
Subject: Re: ChkDsk for Amiga?
Message-ID: <1741@lpami.wimsey.bc.ca>
Date: 15 Jun 90 21:18:34 GMT
Lines: 38
Return-Path: <lpami!lphillips>
To: van-bc!rnews

In <3655@eklektik.UUCP>, danbabcock@eklektik.UUCP (/dev/ph1) writes:
>Well, the dos.library crashed yet again. As usual, the problem is
>untested error-handling code. I inserted an unformatted disk and got a
>guru #3. The last time I reported a similar problem a wiseguy blamed it
>on the ARP command I was using. This time merely inserting a disk was
>sufficient to crash dos.library.
>
>Anyway, to get to the point of the message...at the time of the crash,
>my assembler was writing to my hard drive, meaning that it was left in
>a corrupt state. When I rebooted, AmigaDOS refused to access my hard
>drive. I loaded up DiskX and looked at the root block. The checksum was
>bad, so I fixed it and wrote out the block. Now I can use my hard drive -
>and I haven't had any problems yet - but that checksum was bad for a
>*reason*!
>
>So.....is there a utility similar to ChkDsk for ms-dos that verifies the
>disk structure (and reports any problems)? Maybe no serious damage was
>done. On the other hand, my hard drive may be a "time bomb".
>[yes, I have already copied important files to floppies]
>
>Any help would be greatly appreciated!!!

Use DiskX again, and take a look at the 'bitmap valid' flag.  It's the longword
at 0x138 (bytes) offset in the root block. Zero it out, exit, and do a
'diskchange' on that partition. The validator will kick in and rebuild the
bitmap. Check to see if you have everything, and if not, it's time for a
sojourn with DiskSalv. Since you say you have copied everything imprtant off,
it's relatively safe to try this.

-larry

--
The raytracer of justice recurses slowly, but it renders exceedingly fine.
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|   //   Larry Phillips                                                 |
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