Greetings,
I was experimenting with zfs, and i made the following test, i shutdown the
computer during a write operation
in a mirrored usb storage filesystem.
Here is my configuration
NGS USB 2.0 Minihub 4
3 USB Silicom Power Storage Pens 1 GB each
These are the ports:
hub devices
/-------------------------------------------\
| port 2 | port 1 |
| c10t0d0p0 | c9t0d0p0 |
---------------------------------------------
| port 4 | port 4 |
| c12t0d0p0 | c11t0d0p0 |
\________________________/
Here is the problem:
1)First i create a mirror with port2 and port1 devices
zpool create myPool mirror c10t0d0p0 c9t0d0p0
-bash-3.2# zpool status
pool: myPool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
myPool ONLINE 0 0 0
mirror ONLINE 0 0 0
c10t0d0p0 ONLINE 0 0 0
c9t0d0p0 ONLINE 0 0 0
errors: No known data errors
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c5t0d0s0 ONLINE 0 0 0
errors: No known data errors
2)zfs create myPool/myfs
3)created a random file (file.txt - more or less 100MB size)
digest -a md5 file.txt
3f9d17531d6103ec75ba9762cb250b4c
4)While making a second copy of the file:
cp file.txt test &
I've shutdown the computer while the file was being copied. And restarted
the computer again. And here is the result:
-bash-3.2# zpool status
pool: myPool
state: UNAVAIL
status: One or more devices could not be used because the label is missing
or invalid. There are insufficient replicas for the pool to continue
functioning.
action: Destroy and re-create the pool from a backup source.
see: http://www.sun.com/msg/ZFS-8000-5E
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
myPool UNAVAIL 0 0 0 insufficient replicas
mirror UNAVAIL 0 0 0 insufficient replicas
c12t0d0p0 OFFLINE 0 0 0
c9t0d0p0 FAULTED 0 0 0 corrupted data
pool: rpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
rpool ONLINE 0 0 0
c5t0d0s0 ONLINE 0 0 0
errors: No known data errors
-------------------------------------------------------------------
I was expecting that only one of the files was corrupted, not the all the
filesystem.
Thanks & Regards
Paulo
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