[linux-lvm] Bad disk?
Stuart D. Gathman
stuart at bmsi.com
Thu Nov 11 16:46:37 UTC 2010
On Wed, 10 Nov 2010, Mauricio Tavares wrote:
> > Tell us exactly what you mean by "put a LVM on it". Did you run
> > pvcreate? vgcreate? lvcreate? You might find the output of "pvs"
> > enlightening. That will tell us what PVs you have created.
> > And list /dev/mapper so we know what dm-0 is, and include the output of
> > "lvs".
> Let me put this way, I thought I did. I mean, after creating the
> partition, setting it to LVM (8e), then running
> pvcreate /dev/sdc1
> vgcreate export /dev/sdc1
> lvcreate -L 400G --name vms export
> I used mkfs.ext4 to create partition (on /dev/mapper/export-vms) and off I
> went. Do you think I missed a step?
Great. Now include output of "lvs"
BTW, if you really suspect a disk error, test for it directly.
E.g., you can run
# dd if=/dev/sdc1 of=/dev/null bs=256k
to read through the partition or
# smartctl -t long /dev/sdc
To initiate a long self test of the disk (need smartmontools installed).
A brand new disk that flunks self test is indeed defective.
However, for real physical I/O errors, there would be errors logged
in /var/log/messages referencing sdc (as opposed to dm-0), so I still
think it is a logical error.
Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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