Date: Mon, 12 Oct 1998 11:23:57 -0400 (EDT) From: Alfred Perlstein <bright@hotjobs.com> To: Zach Heilig <zach@gaffaneys.com> Cc: current@FreeBSD.ORG Subject: Re: bitten 3 times already. Message-ID: <Pine.BSF.4.05.9810121113130.13201-100000@porkfriedrice.ny.genx.net> In-Reply-To: <19981012023022.A18715@znh.org>
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On Mon, 12 Oct 1998, Zach Heilig wrote:
> > this is the third time freebsd has decided that wd0s1b wasn't "comfy"
> > enough for a crashdump and ate a different partition while dumping.
> ....
> > also, anyone have something i can do to get a dump of my partitions to
> > examine why it's confusing the crashdump mechanism?
>
> A few questions that maybe might help to sort this out (You can mail these
> answers to me if you want me to check them):
>
> Is that swap partition at least 64K bigger than the amount of RAM you have?
> (It is good to make at least one swap partition ~25-50% bigger than physical
> ram if you have multiple swap partitions.. and at least twice as big if
> you have only one swap partition).
>
> Does /usr and the swap device overlap (check 'disklabel wd0s1', /usr is usually
> on the next partition after the swap partition in the default install)?
> (size + offset should be equal to the offset of the next used partition)
>
> check what 'dumpon -v /dev/wd0s1b' says.
> make sure 'sysctl kern.dumpdev' matches.
disklabel -r wd0s1
a: 81920 0 4.2BSD 0 0 0 # (Cyl. 0 - 5*)
b: 614400 163840 swap # (Cyl. 10*-48*)
c: 8385867 0 unused 0 0 # (Cyl. 0 -521*)
e: 81920 81920 4.2BSD 0 0 0 # (Cyl. 5*-10*)
f: 4096000 778240 4.2BSD 0 0 0 # (Cyl. 48*-303*)
g: 3511627 4874240 4.2BSD 0 0 0 # (Cyl. 303*-521*)
/dev/wd0s1a on / (local, soft-updates, writes: sync 4 async 375)
/dev/wd0s1f on /usr (local, soft-updates, writes: sync 12 async 7952)
/dev/wd0s1e on /var (local, soft-updates, writes: sync 77 async 350)
/dev/wd0s1g on /usr/home (local, soft-updates, writes: sync 201 async1131)
/dev/wd0s2e on /spare (local, soft-updates, writes: sync 2 async 0)
Please for the love of god don't tell me all my partitions overlap by one
cyl :( (well, unless they do, so i can dump them quick and fix this) :)
top:
Mem: 44M Active, 29M Inact, 16M Wired, 33M Cache, 7340K Buf, 616K Free
Swap: 300M Total, 300M Free
So i have plenty of swap vs RAM which is 128megs
I double checked the dump device before _the bad thing_ happened.
it said:
kern.dumpdev: { major = 0, minor = 131073 }
brw-r----- 1 root operator 0, 0x00020001 Oct 11 14:58 /dev/wd0s1b
Also:
wdc0 at 0x1f0-0x1f7 irq 14 flags 0x7fff7fff on isa
wdc0: unit 0 (wd0): <IBM-DHEA-38451>, LBA, DMA, multi-block-16, sleep-hack
wd0: 8063MB (16514064 sectors), 17475 cyls, 15 heads, 63 S/T, 512 B/S
i'm quite sure i have LBA translations going on, however i'm kinda certain
that the disk driver isn't running amok because all my other partitions
were fine (except /usr)
thank you for taking the time to help me with this, go an idea of what's
going on here?
thanks,
Alfred Perlstein - Programmer, HotJobs Inc. - www.hotjobs.com
-- There are operating systems, and then there's FreeBSD.
-- http://www.freebsd.org/ 3.0-current
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