Subject: "block size invariant failed" panic (was: Re: scsi hardware error)
To: None <email@example.com>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 01/02/2002 15:08:08
To further check out my hardware, I tried dd'ing one of my drives to
/dev/null. The result was a panic, with no sign of a hardware error...
dd if=/dev/sd1e of=/dev/null bs=10240
It churned for a while, then said "panic: getblk: block size invariant
failed". (This is under NetBSD 1.5.2.)
Is this something to worry about? Or is this "normal" when reading a
block special device without checking if the file system size is, in
fact, a multiple of the blocksize I specified? (Note that I did *not*
I'd try to get a dump, but with drive 0 showing serious signs of ill
health I don't think I could write the dump anywhere.
--Steve Bellovin, http://www.research.att.com/~smb
Full text of "Firewalls" book now at http://www.wilyhacker.com