Friday December 07, 2007 Today's Page Hits: 349
Friday December 07, 2007 Not long ago I posted about installing the RW ZFS beta seed on Leopard after updating to 10.5.1.
As I said after the end of that post, It does work. On the one hand I haven't had this many system
panics on a mac ever. On the other hand I have repartitioned my laptop and now have ZFS pools
mirrored to an external USB stick and a firewire drive.
Since the simple tests below I have re-installed to get more partitioning flexibility. I couldn't do a live
repartition to get the space I wanted. Every attempt to repartition after the first was informing me that
there wasn't enough space.
After pulling the drive but before directing any traffic to the pool:
After initiating a scrub on the pool:
Disconnect while writing files to the volume via rsync:
When the disk went offline the IO slowed (somewhat dramatically), when it came back online it also slowed (again dramatically for ~1-2s). The resilver started and writing data to the pool while resilvering slowed everything down a bit but nothing horrible.
More to come. On a day to day basis I am running iTunes and my music library on ZFS.
My first hint: I recommend turning off spotlight indexing on the ZFS volume it seems SIGNIFICANTLY more stable.
As I said after the end of that post, It does work. On the one hand I haven't had this many system
panics on a mac ever. On the other hand I have repartitioned my laptop and now have ZFS pools
mirrored to an external USB stick and a firewire drive.
Since the simple tests below I have re-installed to get more partitioning flexibility. I couldn't do a live
repartition to get the space I wanted. Every attempt to repartition after the first was informing me that
there wasn't enough space.
After pulling the drive but before directing any traffic to the pool:
errors: No known data errors
pool: pool
state: ONLINE
scrub: resilver completed with 0 errors on Mon Dec 3 15:44:43 2007
config:
NAME STATE READ WRITE CKSUM
pool ONLINE 0 0 0
mirror ONLINE 0 0 0
disk0s3 ONLINE 0 0 0
disk1s1 ONLINE 0 0 0
errors: No known data errors
After initiating a scrub on the pool:
pool: pool
state: DEGRADED
status: One or more devices could not be opened. Sufficient replicas exist for
the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
see: http://www.sun.com/msg/ZFS-8000-D3
scrub: scrub in progress, 11.12% done, 0h1m to go
config:
NAME STATE READ WRITE CKSUM
pool DEGRADED 0 0 0
mirror DEGRADED 0 0 0
disk0s3 ONLINE 0 0 0
disk1s1 UNAVAIL 0 0 0 cannot open
errors: No known data errors
zpool online pool disk1s1
Disconnect while writing files to the volume via rsync:
pool: pool
state: DEGRADED
status: One or more devices could not be opened. Sufficient replicas exist for
the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
see: http://www.sun.com/msg/ZFS-8000-D3
scrub: resilver completed with 0 errors on Mon Dec 3 15:56:10 2007
config:
NAME STATE READ WRITE CKSUM
pool DEGRADED 0 0 0
mirror DEGRADED 0 0 0
disk0s3 ONLINE 0 0 0
disk1s1 UNAVAIL 0 595 0 cannot open
errors: No known data errors
When the disk went offline the IO slowed (somewhat dramatically), when it came back online it also slowed (again dramatically for ~1-2s). The resilver started and writing data to the pool while resilvering slowed everything down a bit but nothing horrible.
More to come. On a day to day basis I am running iTunes and my music library on ZFS.
My first hint: I recommend turning off spotlight indexing on the ZFS volume it seems SIGNIFICANTLY more stable.
Post a Comment:
Comments are closed for this entry.
You know, OS X has raid support for a long time, and you can create large volumes using ride also.
Posted by teon on December 07, 2007 at 08:31 AM EST #
:) yes, I am already using the native RAID support.
It works, I trust it. I have more than one CCC backup of my system prior to trusting important
data to a beta RW implementation of ZFS written to native RAID 1.
My goal here isn't to create large volumes. As part of my external storage solution
I have an OWC enclosure with 400GB of mirrored storage and 100GB of striped storage.
As well as another external enclosure for backups.
My ZFS implementation is mirroring a 60GB drive to a 60GB partition.
Why when I don't need the space? Because I use my music most every day and
this allows me to do simple "tests" by just using my mac.
I also want some storage that I can move between systems that isn't using FAT
as the underlying disk format.
Posted by Shawn Ferry on December 07, 2007 at 10:54 AM EST #
testing white space...I don't know why it is working for @lskrocki
good way to drive more traffic to your blog.
I knew about auto-formatted links, but I expect that when I post this,
all the lines will run together.
Guess I'll find out in a moment. And if they don't what did I do diferently here? http://blogs.sun.com/yakshaving/entry/rw_and_zfs_leopard_my#comments
Posted by Shawn Ferry on December 07, 2007 at 11:22 AM EST #
Testing line breaks.
This is paragraph two.
This is paragraph three with a link to http://blogs.sun.com
Posted by Skrocki on December 07, 2007 at 11:25 AM EST #
testing again, after enabling convert linebreaks for entries....
Maybe it applies to comments as well.
Posted by Shawn Ferry on December 07, 2007 at 11:25 AM EST #
one more test.
this time w/ three returns between paragraphs.
if it's still busted, i'm blaming template customizations. :-)
Posted by Skrocki on December 07, 2007 at 11:26 AM EST #
Creating an off topic conversation to drive readers to my blog...
OR
Trying to figure out why I don't get line breaks in comments.
YOU decide!
Posted by Shawn Ferry on December 07, 2007 at 11:29 AM EST #
It is possible that it is theme customization. Is there something special in theme that controls comments?
Is this the impetus to refresh the look of my blog? I can be a follower and drop all this customization
Posted by Shawn Ferry on December 07, 2007 at 11:34 AM EST #