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Date: Wed, 26 Feb 1997 19:19:07 -0500
From: "Jeffrey M. Metcalf" <metcalf@snet.net>
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Subject: Using bad144 to scan for bad blocks
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Hello,

I recently wrote questions@freebsd.org to ask about a FreeBSD program
for scanning a hard disk 
for errors.  I was told that bad144 was the way to go.  However, when I
run the following

bad144 -s -v /dev/wd0s2

I get the following (abbreviated)


-----------------------------------------------------


bad block information at sector 1024065 in /dev/wd0s2:
cartridge serial number: -2097151993(10)
bt_flag=8875(16)?
sn=62466193, cn=15491, tn=100, sn=181
sn=28224, cn=7, tn=0, sn=0
sn=70657159, cn=17524, tn=4, sn=139
sn=116335303, cn=28853, tn=0, sn=7
bad144: /dev/wd0s2: bad flag in bad-sector table
bad144: /dev/wd0s2: bad magic number
bad144: cyl/trk/sect out of range in existing entry: sn=62466193,
cn=15491, tn=1
00, sn=181
bad144: bad sector file is out of order
bad144: cyl/trk/sect out of range in existing entry: sn=70657159,
cn=17524, tn=4
, sn=139
bad144: cyl/trk/sect out of range in existing entry: sn=116335303,
cn=28853, tn=
0, sn=7
bad144: cyl/trk/sect out of range in existing entry: sn=135217463,
cn=33536, tn=
1, sn=248
bad144: cyl/trk/sect out of range in existing entry: sn=58282122,
cn=14453, tn=1
17, sn=255
bad144: cyl/trk/sect out of range in existing entry: sn=263274849,
cn=65296, tn=
20, sn=117
bad144: cyl/trk/sect out of range in existing entry: sn=54708625,
cn=13567, tn=1
00, sn=181
bad144: cyl/trk/sect out of range in existing entry: sn=42840, cn=7,
tn=232, sn=
0
bad144: cyl/trk/sect out of range in existing entry: sn=262128576,
cn=65008, tn=
255, sn=255
bad144: cyl/trk/sect out of range in existing entry: sn=202846215,
cn=50307, tn=
133, sn=12


--------------------------------------------

and many more lines similar to the last few are displayed.  I am not at
all sure how
to interpret this.  Does the fact that the hard drive I am using is set
up to dual
boot with WIN95 and FreeBSD have anything to due with the following
error:

bad block information at sector 1024065 in /dev/wd0s2:

Is it also responsible for all of the out of range errors as well?  If
so, is there a 
way that I can get bad144 to only analyze and report on the portion of
the hard drive
with the FreeBSD slices?  If not, are there any other FreeBSD utilities
for scanning hard 
drives for errors?  I don't imagine that I can convince DOS/WIN95
versions of scandisk to
search for physical errors on my FreeBSD partition.

Thank you,




-- 
Jeffrey M. Metcalf
metcalf@snet.net

http://ruddles.stat.uconn.edu/~jeff