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<TITLE>The Answer Guy 32:
Another Non-Linux Question!
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Bad Clusters on Hard Drive
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<H4>"Linux Gazette...<I>making Linux just a little more fun!</I>"
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<H4 align="center">By James T. Dennis,
<a href="mailto:answerguy@ssc.com">answerguy@ssc.com</a>
<BR>Starshine Technical Services, <A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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<H3><img src="../gx/dennis/qbub.gif" alt="(?)"
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>Another Non-Linux Question!</H3>
<p><strong>From weasel_90 on 02 Aug 1998</strong></p>
<!-- begin body -->
<strong><p>Hi,
</p></strong>
<p><strong>I have a 1.2GB Hard Drive. It has a few Bad Clusters, which
are mostly at the end of the drive. Everytime I use <TT>Scandisk</TT> it
freezes on 99%. All my programs run fine, but sometimes they freeze
and I have to reboot the computer. I assume it is accessing data
from the bad clusters and it freezes sometimes. I thought <TT>scandisk</TT>
was suppose to mark bad clusters and tell the computer not to use
them. Is there any way that is really safe where I can either
seperate or put all those bad clusters away so that the computer
doesn't use them and store data on them? I would appreciate your
help. This one has stumped me. Thank You!
</strong></p>
<BLOCKQUOTE><IMG SRC="../gx/dennis/bbub.gif" ALT="(!)" width="50" height="28" border="0" lign="bottom"
>So, what happens when you install Linux and run the
'<TT>badblocks</TT>' program (or make the filesystem using the
<TT>mke2fs -c</TT> option)?
</blockquote>
<BLOCKQUOTE>This may seem like an unsatisfying answer --- but you
should probably be aware that
"<A HREF="mailto:answerguy@ssc.com">answerguy@ssc.com</A>" is
for the "<a href="http://www.linuxgazette.com/">Linux Gazette</a>
Answer Guy." I volunteer my time to answer questions that related to
Linux. I do that to show my appreciation for all the effort that Linus
Torvalds, Alan Cox, Stephen Tweedie, Ted T'so, and hundreds of other
programmers have put into creating the operating system that
I use. </blockquote>
<BLOCKQUOTE>I do NOT volunteer my time to answer questions that are
purely about Microsoft's operating system (or any other
proprietary software, for that matter). The companies that
produce these products can pay for their own support staff.
If they choose not to do so, or are otherwise unwilling or
unable to provide you with support that meets your needs
--- you should probably reconsider your purchasing decisions.
</blockquote>
<BLOCKQUOTE>Sigh!</blockquote>
<BLOCKQUOTE>Since I suffer from a compulsion to answer questions
thoroughly here's a few suggestions:
</blockquote>
<BLOCKQUOTE>Your obvious alternative would be to replace that
drive with a newer, less defective one. Normal, modern IDE
and SCSI drives have extra sectors on every track which are
"mapped" over any bad sectors on that track. Thus it is
relatively rare for bad sectors to be visible to the operating
system's drivers. You could put the new drive in as the
"master" and you could install Linux over the old drive ---
just to learn more about it.
</blockquote>
<BLOCKQUOTE>Another alternative would be to use something like
the <a href="http://www.symantec.com/">Norton</a> Utilities.
Perhaps one of those is more robust than the
accessories that came with your OS.
</blockquote>
<BLOCKQUOTE>If none of that works, backup your system, re-install the OS
from scratch and see if the re-FORMAT detects and properly
handles these bad sectors --- or re-partition, make the last
partition a couple of percent smaller and then re-install.
</blockquote>
<BLOCKQUOTE>If you don't have a backup system which is sufficiently reliable
and of sufficient capacity to do a full system backup and
restore --- then you're hopeless.
</blockquote>
<blockquote>While we're on the subject of "hopeless" --- it may
seem awfully curmudgeonly of me, but surely <em>some</em> of these
options must have occurred to you. I really hope that you
weren't actually "stumped" by this!
</blockquote>
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<H5 align="center"><a href="http://www.linuxgazette.com/ssc.copying.html"
>Copyright ©</a> 1998, James T. Dennis <BR>
Published in <I>Linux Gazette</I> Issue 32 September 1998</H5>
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