On Thu, 27 Feb 2014 12:19:05 -0600 Justin Brown <otakujunct...@gmail.com> wrote:
> I've a 18 tera hardware raid 5 (areca ARC-1170 w/ 8 3 gig drives) in Do you sleep well at night knowing that if one disk fails, you end up with basically a RAID0 of 7x3TB disks? And that if 2nd one encounters unreadable sector during rebuild, you lost your data? RAID5 actually stopped working 5 years ago, apparently you didn't get the memo. :) http://hardware.slashdot.org/story/08/10/21/2126252/why-raid-5-stops-working-in-2009 > need of help. Disk usage (du) shows 13 tera allocated yet strangely > enough df shows approx. 780 gigs are free. It seems, somehow, btrfs > has eaten roughly 4 tera internally. I've run a scrub and a balance > usage=5 with no success, in fact I lost about 20 gigs after the Did you run balance with "-dusage=5" or "-musage=5"? Or both? What is the output of the balance command? > terra:/var/lib/nobody/fs/ubfterra # btrfs fi df . > Data, single: total=17.58TiB, used=17.57TiB > System, DUP: total=8.00MiB, used=1.93MiB > System, single: total=4.00MiB, used=0.00 > Metadata, DUP: total=392.00GiB, used=33.50GiB ^^^^^^^^^ If you'd use "-musage=5", I think this metadata reserve should have been shrunk, and you'd gain a lot more free space. But then as others mentioned it may be risky to use this FS on 32-bit at all, so I'd suggest trying anything else only after you reboot into a 64-bit kernel. -- With respect, Roman
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