On Sep 26, 2011, at 11:18 AM, Paras pradhan <pradhanpa...@gmail.com> wrote:
> Hi Lamar, > > On Mon, Sep 26, 2011 at 5:53 AM, Lamar Owen <lo...@pari.edu> wrote: >> On Friday, September 23, 2011 04:29:39 PM Paras pradhan wrote: >>> This is a SAN drive mounted. I have checked with my storage >>> administrator if this has been re mapped or any similar events and he >>> verified that nothing has happened...(I trust him) >> >> May I ask what sort of SAN? Fibre Channel or iSCSI? Are there any access >> controls (such as EMC's Access Logix or zoning in the switch) in place to >> prevent multiple initiators connecting to a particular LUN? > > Its a Hitachi OpenV fibre channel SAN (4Gbps HBA). My storage admin > checked if this LUN can be accessible by others and he found no other > hosts have access to it. > >> >> SAN attachment mildly complicates things; I've seen some odd LUN reshuffling >> before, but it was an older FLARE than what I'm currently running on our >> Clariions and it was something that was a corner case but was fixed in a >> later NDU, and it had to do with Access Logix (I don't remember the Primus >> number right off, as it has been several years now). > > reshuffling here means automatically changing disk's geometry as I am > having an issue? It would be interesting to know if this can happen. > >> >> If the SAN OS keeps event logs you could try to correlate with the event; >> beyond that you may just have to do some testing. >> >> As you say, someone somewhere had to do a repartition; the hard part is >> determining where the error is. Good luck. > > > Here are some new additional info : > > My colleague mounted this LUN to a different host and we found the > same partitions over there too which is normal. > > I dd a 1st device to a file and opened the image file with bvi and > found some hosts name, VG name etc etc. in there. Then he ran a > recovery tool (R studio) in all three devices and was able to recover > most of this data. > So my question is: if the LUN has been re partitioned for ex: say to > install windows , why am i seeing our data in these newly created > partitions? Is it possible to see data in a reapportioned drive? Might it be possible you ran KVM on the host and accidentally set the guest disk to /dev/sda? -Ross _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
