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- From: das@eplunix.UUCP (David Steffens)
- Newsgroups: comp.sys.sun.admin,comp.sys.sun.hardware
- Subject: Re: Anyone know what a "writeback error" is?
- Message-ID: <1275@eplunix.UUCP>
- Date: 15 Sep 92 04:10:21 GMT
- References: <1992Sep11.022648.28954@galois.mit.edu>
- Organization: Eaton-Peabody Lab, Boston, MA
- Lines: 33
-
- Yikes! Just answered this a month ago. Guess it's deja vu all over again :-)
-
- In article <1992Sep11.022648.28954@galois.mit.edu>,
- sangho@runge.mit.edu (Sangho Yoon) says:
- > I've been getting these errors every time I try to run dump onto an exabyte.
- > The system is configured like this :
- > 4/260 running SunOS 4.1.1
- > ... the system crashes with the following error:
- > panic: writeback error
-
- There is a bug in 4.1.1 on Sun 4/200-class processors that causes a panic
- if you have an entry in /etc/fstab for your _primary_ swap partition.
- For example, my disks are xd0 and xd1. I have a swap partition on each,
- namely /dev/xd0b and /dev/xd1b, but /dev/xd0b is my _primary_ swap
- partition because root is on /dev/xd0a. If /dev/sd0a is your root,
- then /dev/sd0b is your primary swap partition and so on.
-
- Fix: If you have a primary swap partition entry in your /etc/fstab, e.g.
- /dev/xd0b swap swap rw 0 0
- then you must either delete it or comment it out with # and reboot.
-
- Note: Entries for secondary swap partitions in /etc/fstab are OK, e.g.
- /dev/xd1b swap swap rw 0 0
- These other, non-primary entries are also required if you want "swapon -a"
- to install secondary swap partitions automatically from /etc/rc at boot time.
-
- Credits: This bug was found and reported by someone at Columbia University so
- long ago that I've lost the original posting and forgotten the poster's name.
- --
- David Allan Steffens | I believe in learning from past mistakes...
- Eaton-Peabody Laboratory | but why does a good education require so many?
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