> > Error writing block 269, (Attempt to write block from filesystem
resulted
> > in short write) Error writing block 269, (Attempt to write block from
> > filesystem resulted in short write)
>
> I presume you've written a script for domain 1 that does a
> 'physical grant -phda14 -w' ? It looks like part of the problem
> is that you don't have write access to the partition.
We hadn't... we were under the impression that physical grant alone gave
read and write access, which is why we were wary of it.
This fixes that device's errors.
> If you still have problems, please can you tell us a bit more
> about your exact file system configuration, your xenctl.xml file,
> the scripts you've written to start each domain, etc.
Great--let us know if there's any other information you think will help us
narrow down what's going on.
The filesystem data is included below, along with xenctl.xml,
xen-mynewdom, and our fstab file. We have logs from attempts to start xen
if you'd like to see those too.
> It's odd that you're having so much trouble as at least as far as
> I can figure from previous emails you're not trying to setup a
> configuration that's at all unusual. I'm sure we can get this
> figured out...
I think part of the problem is that we're not really strong on kernel
hacking and linux installation. I think there's some background that, if
we had it, would make everything we need help on very plain and obvious.
We've really just been following instructions step by step and hoping it
works, and when encountering difficulties it's hard to guess what the
problem is... so we just grope around as best we can trying to see what
could correspond to the error, typing things into google like mad.
Also, we might not have mentioned this earlier, but earlier than two weeks
ago we discovered some of our errors were hardware related(the demo CD
wouldn't run). (We were running on a PII 400mhz w/256mb RAM). Since then
we've switched to a PIII 633mhz w/256mb RAM. So part of our errors were
not-fixable, earlier on.
Anyway. Let us know if we can do anything to make things easier--this
must be annoying having us ask questions so often =/
-Jefferson
--
Some quick questions:
-Should there be directories and utilities inside the roots for each xen
domain? When we used the demo CD it had data from the initrd.gz, but
we're not sure if that's necessary.
A summary of our errors:
-If we give a domain a physical grant of our root(/dev/hda2) readonly, we
get a kernel panic--it says the root is unclean, tries to clean it, and
finds it doesn't have write access.
-If we give a physical grant of readwrite to a xen partition(100mb ofempty
space, /dev/hda14), and readonly to everything else, it tries to
recover a journal on one of the other xen partitions and runs out of file
descriptors.
Data about our filesystem:
>From df:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda2 16128668 2603208 12706148 18% /
/dev/hda1 101089 11755 84115 13% /boot
none 63820 0 63820 0% /dev/shm
**these xens are normally unmounted
/dev/hda5 101089 4127 91743 5% /xen10
/dev/hda14 101089 4127 91743 5% /xen1
/dev/hda13 101089 4127 91743 5% /xen2
/dev/hda12 101089 4127 91743 5% /xen3
/dev/hda11 101089 4127 91743 5% /xen4
/dev/hda10 101089 4127 91743 5% /xen5
/dev/hda9 101089 4127 91743 5% /xen6
/dev/hda8 101089 4127 91743 5% /xen7
/dev/hda7 101089 4127 91743 5% /xen8
/dev/hda6 101089 4127 91743 5% /xen9
>From /etc/fstab:
LABEL=/ / ext3 defaults 1 1
/dev/hda1 /boot ext3 defaults 1 2
none /dev/pts devpts gid=5,mode=620 0 0
none /proc proc defaults 0 0
none /dev/shm tmpfs defaults 0 0
#/dev/hda14 /xen1 ext3 defaults 1 2
#/dev/hda5 /xen10 ext3 defaults 1 2
#/dev/hda13 /xen2 ext3 defaults 1 2
#/dev/hda12 /xen3 ext3 defaults 1 2
#/dev/hda11 /xen4 ext3 defaults 1 2
#/dev/hda10 /xen5 ext3 defaults 1 2
#/dev/hda9 /xen6 ext3 defaults 1 2
#/dev/hda8 /xen7 ext3 defaults 1 2
#/dev/hda7 /xen8 ext3 defaults 1 2
#/dev/hda6 /xen9 ext3 defaults 1 2
/dev/hda3 swap swap defaults 0 0
Our /etc/xenctl.xml file:
<?xml version="1.0"?>
<domctl_defaults>
<domain_name>XenoLinux</domain_name>
<domain_size_kb>98304</domain_size_kb>
<domain_image>/boot/xenolinux.gz</domain_image>
<domain_vifs>1</domain_vifs>
<root_device>/dev/hda2</root_device>
<root_args>ro</root_args>
<args>DOMID=+</args>
<nw_ip>169.254.1.0+</nw_ip>
<nw_gw>169.254.1.0</nw_gw>
<nw_mask>255.255.0.0</nw_mask>
<nw_nfs_server>169.254.1.0</nw_nfs_server>
<max_domain_number>1000</max_domain_number>
<xi_tools_dir>/usr/local/bin/</xi_tools_dir>
</domctl_defaults>
Our /etc/xen-mynewdom file:
domain new
physical grant -phda14 -w
domain start
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