I wanted to stress test ZFS. There was a folder /root/save/ocz. There were 5-6 files there, most of them were about 40GB. Huge parts of these files were totally identical. Dedup was turned on. This is how they fit on a 149GB USB HDD. I ran rm -rf /root/save. The hard drive was working hard. After a minute I did a hard reset while the drive was working. In my experience power loss occurs time to time even with UPS. Even in data centers I experienced power losses on my servers.
The system booted fine. Some of the files seemed to be deleted in /root/save/ocz/, some of them were still there. I deleted the rest normally (without another reset). The disk space seems to be still referenced. The falsely referenced space is 40GB. Same as the average file size was in that folder. The data is not important, I would like to fix this just to be able to fix this. And because I plan to migrate my desktop and my servers to FreeBSD/ZFS.
After running scrub the space is still missing. I also read that I should run zdb -bb zroot, however it says:
OpenIndiana doesn't boot on this computer and honestly I would like to fix it with FreeBSD alone.
The system booted fine. Some of the files seemed to be deleted in /root/save/ocz/, some of them were still there. I deleted the rest normally (without another reset). The disk space seems to be still referenced. The falsely referenced space is 40GB. Same as the average file size was in that folder. The data is not important, I would like to fix this just to be able to fix this. And because I plan to migrate my desktop and my servers to FreeBSD/ZFS.
After running scrub the space is still missing. I also read that I should run zdb -bb zroot, however it says:
# zdb -bb zroot
Code:
zdb: can't open 'zroot': No such file or directoryOpenIndiana doesn't boot on this computer and honestly I would like to fix it with FreeBSD alone.
# uname -a
Code:
FreeBSD eve 9.0-RC3 FreeBSD 9.0-RC3 #0: Sun Dec 4 08:56:36 UTC 2011
[email]root@farrell.cse.buffalo.edu[/email]:/usr/obj/usr/src/sys/GENERIC amd64 # zpool status
Code:
pool: zroot
state: ONLINE
scan: scrub repaired 0 in 0h39m with 0 errors on Thu Dec 15 22:01:50 2011
config:
NAME STATE READ WRITE CKSUM
zroot ONLINE 0 0 0
ada0p2 ONLINE 0 0 0
errors: No known data errors # zfs list -t all
Code:
NAME USED AVAIL REFER MOUNTPOINT
zroot 59.0G 90.3G 40.3G legacy
zroot/swap 4.13G 94.3G 111M -
zroot/tmp 118M 90.3G 118M /tmp
zroot/usr 14.0G 90.3G 6.56G /usr
zroot/usr/home 4.46G 90.3G 4.46G /usr/home
zroot/usr/ports 2.59G 90.3G 487M /usr/ports
zroot/usr/ports/distfiles 2.11G 90.3G 2.11G /usr/ports/distfiles
zroot/usr/ports/packages 32K 90.3G 32K /usr/ports/packages
zroot/usr/src 350M 90.3G 350M /usr/src
zroot/var 125M 90.3G 10.1M /var
zroot/var/crash 31.5K 90.3G 31.5K /var/crash
zroot/var/db 99.0M 90.3G 81.9M /var/db
zroot/var/db/pkg 17.1M 90.3G 17.1M /var/db/pkg
zroot/var/empty 31K 90.3G 31K /var/empty
zroot/var/log 1.88M 90.3G 1.88M /var/log
zroot/var/mail 60K 90.3G 60K /var/mail
zroot/var/run 83.5K 90.3G 83.5K /var/run
zroot/var/tmp 14.1M 90.3G 14.1M /var/tmp # zfs get all zroot
Code:
NAME PROPERTY VALUE SOURCE
zroot type filesystem -
zroot creation Tue Dec 13 2:24 2011 -
zroot used 59.0G -
zroot available 90.3G -
zroot referenced 40.3G -
zroot compressratio 1.01x -
zroot mounted yes -
zroot quota none default
zroot reservation none default
zroot recordsize 128K default
zroot mountpoint legacy local
zroot sharenfs off default
zroot checksum on default
zroot compression off default
zroot atime on default
zroot devices on default
zroot exec on default
zroot setuid on default
zroot readonly off default
zroot jailed off default
zroot snapdir hidden default
zroot aclmode discard default
zroot aclinherit restricted default
zroot canmount on default
zroot xattr off temporary
zroot copies 1 default
zroot version 5 -
zroot utf8only off -
zroot normalization none -
zroot casesensitivity sensitive -
zroot vscan off default
zroot nbmand off default
zroot sharesmb off default
zroot refquota none default
zroot refreservation none default
zroot primarycache all default
zroot secondarycache all default
zroot usedbysnapshots 0 -
zroot usedbydataset 40.3G -
zroot usedbychildren 18.7G -
zroot usedbyrefreservation 0 -
zroot logbias latency default
zroot dedup sha256 received
zroot mlslabel -
zroot sync standard default
zroot refcompressratio 1.00x - # cd / && du -shx
Code:
544M .