Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Kelly Byrd wrote: > > On Thu, 18 Oct 2007 18:48:56 +0200, "Rudi Ahlers" > <Rudi at SoftDux.com> wrote: > > Hi all > > > > I'm new to drbd and have some questions, hoping someone > could help me. > I'd > > like to use software RAID & LVM to make it easier to upgrade in the > future. > > > > > how do I manage such a setup? > > Do I first setup the RAID, then the LVM volumes and the drbd? > > Can I install & setup drbd on partitions with existing data? > > > > What are you looking for in the end? One big replicated chunk > of space? Do you need smaller granularity? For the local > RAID, what are the requirements there? RAID0? RAID5? RAID1? > > If you're going to run raid and lvm underneath drbd, I'm not > sure how you'll keep existing data. Wouldn't creating LVMs on > top of an existing partition with data in it destroy that > filesystem? > > I'm pretty sure you can't directly create a drbd with existing > data, drbd is a block device, so it would run underneath a > filesystem. If you had a filesystem with data in it already, > making a drbd out of that space would screw up the filesystem > and the data. Just like when you create a RAID1 from existing > data, you copy the data into the RAID1. Create the RAID, whether it is HW or SW. Create a LVM VG out of the RAID array(s). Create LVM LVs out of the VG. You can create a drbd volume after the fact, you just CANNOT create it with the meta-data on that volume you have to locate the meta-data on a separate volume. I prefer to locate the meta-data separately anyways, I create a separate LV for drbd meta-data, and do drbd per-LV instead of per RAID array. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.