I tried some more things:
I created a load of 1G lv's and did mkfs -t xfs on each one in turn.
First few were fine, then the same problem came back again. Here's the
tail of the syslog that's relevant:
Aug 1 17:02:00 picard modprobe: modprobe: Can't locate module
block-major-43
Aug 1 17:02:00 picard last message repeated 31 times
Aug 1 17:02:00 picard kernel: I/O error: dev 08:00, sector 2789278336
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784559747
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784821891
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784821891
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2785083904
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784559744
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784559752
Aug 1 17:02:19 picard kernel: Aug 1 17:05:11 picard kernel: I/O
error: dev 08:00, sector 2785870467
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2786132611
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2786394755
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2786656899
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2786919043
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2786919043
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2785084032
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2786132640
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2786133664
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2786134688
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2786135712
Aug 1 17:05:12 picard kernel: I/O error: dev 08:00, sector 2786137760
I/O error: dev 08:00, sector 2784821888
Aug 1 17:02:19 picard kernel: I/O error: dev 08:00, sector 2784821896
Then, when I tried with any of the lv's created after that one, I get a
load of the same error:
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2785084032
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2785084032
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2785346179
Aug 1 17:05:11 picard kernel: I/O error: dev 08:00, sector 2785608323
...and so on and so on.
Oh, don't know if this helps, but the lvm PE size is set to 32MB (which
I think is the default). I can't quite make this number do anything
significant with the gaps between the errors - I mean, there are exactly
128 x 32 in 4096, but I'm not sure that helps...
Paul.
On Fri, 2003-08-01 at 16:39, Eric Sandeen wrote:
> On Fri, 1 Aug 2003, Bogdan Costescu wrote:
>
> > The numbers are not sequential, but they are monotonically increasing :-)
> > The difference between any 2 values is 8388608. Now if these are 512 byte
> > sectors, this is exactly 4294967296 bytes which is 2^32...
> >
> > This won't help you directly... but might give somebody some idea :-)
>
> The maximum AG size is 4G, for a very large fliesystem. mkfs.xfs writes
> allocation group headers at the start of each AG.
>
> howver, if this was split into small pieces & mkfs'd, then the AGs should
> not be that large... hm.
>
> -Eric
>
>
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