<br><br><div class="gmail_quote">On Mon, Oct 19, 2009 at 9:23 AM, David Knight <span dir="ltr"><<a href="mailto:dlknight@sdf.lonestar.org">dlknight@sdf.lonestar.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
On Mon, October 19, 2009 1:34 am, Jean-Yves Avenard wrote:<br>
> 2009/10/19 Greg Grotsky <<a href="mailto:spikeygg@gmail.com">spikeygg@gmail.com</a>>:<br>
<div class="im">><br>
>><br>
>> 1) plug in the new drive.<br>
>> 2) create a pv, vg, and lv on the new drive.<br>
>> 3) copy all the movies from the�jfs�drive to the new lv.<br>
>> 4) wipe the partition info and create and LVM partition on it.<br>
>> 5) extend the new lv onto the old disk.<br>
>> 6) extend the filesystem.<br>
>> (let me know if I'm missing anything here)<br>
>><br>
>> Because of this I need to use a filesystem that can be resized.� I know<br>
>> that<br>
>> JFS can but I worry that it can not be shrunk (I'm not sure why).<br>
><br>
</div><div class="im">> The more valid question may be, how likely are you going to want to<br>
> shrink a partition size?<br>
><br>
> I run 5x 1.5TB in raid5 + LVM + JFS<br>
><br>
> no trouble here<br>
><br>
> one of my 1.5TB died after only 4 months, got it replaced under<br>
> warranty, glad I had RAID<br>
><br>
><br></div></blockquote></div><br>I've had some issues with my RAID configuration in the past several months. I was running 6 x 500GB drives in a RAID5 with JFS sitting on top. It was working fine until I had 2 drives detach from the array. I was able to rebuild the array and not lose much data thanks to JFS. The fsck.jfs replayed the journal log and saved most of my data. This happened to me several times and I lost my recordings directory along with some Documents. I finally figured out this was all due to a couple bad drives that I got replaced under warranty. I was able to salvage most of my data after the last (4th or 5th corrupted array) and saved it to a server at work. I then went about recreating my array as a RAID6 with 7 drives. This whole setup is running on an old Athlon 2800+ board. The array creation was running at around 12MB/s. It was very slow. But when the array rebuilt, I was able to pull my data back, and it's been running well since. That's been a couple months. However, because I have such a slow PCI bus, I'm having issues with recordings and playing music through Myth. Every once in a while, the playback of a recording will hang. After a couple of minutes, I get dumped back to the recordings screen where I can start the recording over again. I can even FF to just before the point in the playback before the hang and it plays just fine right through. This also happens when I play back music. The music will hang for a few minutes, then it continues.<br>
The point I'm trying to make is, lots of drive space is GREAT, just make sure that your mobo can handle the throughput. I'm not really sure why you'd want LVM to run on top of RAID. That just sounds like extra processing cycles. You can expand RAID without much difficulty. And expanding the JFS partition is as simple as rebooting the box and your space is available right away. I'm pretty sure that my issues stem from the slow mobo along with RAID6. But I think it's worth having the extra protection. Just food for thought.<br>
<br>Jim<br>