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03-26-2012 05:08 AM
03-26-2012 05:08 AM
Hi Guys,
I am using RHEL 5.6 and i am using LVM . I want to know how can i check whether a lv is striped or not in RHEL 5.6.
Commonly in HPUX i can get this detail from lvdisplay -v . but in this case i am not able to get this detail ,
Could anyone please help me on this ....
Regards
Laiju.C.Babu
Solved! Go to Solution.
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03-26-2012 06:29 AM
03-26-2012 06:29 AM
SolutionTry "lvdisplay -m" instead.
In HP-UX, "lvdisplay -v" will display each logical extent on a separate line.
In Linux LVM2 (= all 2.6.* kernels) "lvdisplay -m" will display a more condensed listing. Here's an example:
# lvdisplay -m /dev/vg00/home --- Logical volume --- LV Name /dev/vg00/home VG Name vg00 LV UUID 9v3cKt-40dV-vpWa-NNVv-ptZk-ZVc8-ZBWlxE LV Write Access read/write LV Status available # open 1 LV Size 100.00 GiB Current LE 25600 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 6144 Block device 253:3 --- Segments --- Logical extent 0 to 20921: Type linear Physical volume /dev/dm-0 Physical extents 15616 to 36537 Logical extent 20922 to 25599: Type linear Physical volume /dev/dm-0 Physical extents 2560 to 7237
This is a LV that has been extended once after creation, so it exists as two linear mappings.
The key word here is "linear": it is the default and means "not striped".
I don't have any LVM-striped LVs configured (we usually let the big SAN storage system do the striping), but with a striped LV, I think the "Type" field would say "striped" instead.
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03-26-2012 06:47 AM
03-26-2012 06:47 AM
Re: checking striping in linux
Hi MK,
Thanks for the reply ,,
I got some more commands to get this information
lvs -v --segments
lvs -a -o +devices
Regards
Laiju C Babu