On 2010-10-19 03:07, Eugene Vilensky wrote: > Stepping back a bit, with RHEL I usually have a variation of the > default setup, with a /boot and one giant PV sliced up. Is the > following correct: lvm metadata defaults on RHEL are 64Kbytes, so PVs > and resultant filesystems should stay aligned with any reasonable > stripe size assuming partitions are aligned?
I'm not sure about the default LVM size on RHEL, but I'm pretty sure it's at least 64 KB. You can specify metadata size with pvcreate to make sure it's a multiple of stripe size. If you're not sure what you've got you can check for alignment mismatch using dd with the direct I/O flag as I posted in an earlier message--you just have to be sitting in front of the server so you can see the disk activity lights. _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
